IEC 60335-2-109:2023

IEC 60335-2-109 ®
Edition 2.0 2023-12
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60335-2-109:2023 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-109: Particular requirements for UV radiation water treatment appliances

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IEC 60335-2-109 ®
Edition 2.0 2023-12
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60335-2-109:2023 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-109: Particular requirements for UV radiation water treatment appliances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120, 97.030 ISBN 978-2-8322-7989-2

IEC 60335-1:2020/ISH1:2021 – 1 –
© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 60335-1
Edition 6.0  2020-09
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –

Part 1: General requirements
INTERPRETATION SHEET 1
This interpretation sheet has been prepared by IEC technical committee 61: Safety of
household and similar electrical appliances.
The text of this Interpretation Sheet is based on the following documents:
Draft Report on voting
61/5999/DISH 61/6009/RVDISH
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
___________
INTRODUCTION
Edition 6 of IEC 60335-1:2020 defines and introduces requirements for a detachable
power supply part of an appliance. In the document, 24.2 prohibits the use of a power
supply in a flexible cord.
QUESTION:
Does Subclause 24.2 prohibit the use of a detachable power supply part?
ANSWER
No, a "detachable power supply part" is a defined term and is not captured by the term
"power supply" as used in Subclause 24.2.
NOTE A detachable power supply part is captured by the defined term when the output of the power supply
part is detachable from the class III construction part of the appliance at:
– the power supply part, or
– the class III construction part of the appliance.
However, the supply cord (if any) does not have to be detachable from the detachable power supply part.
ICS 13.120; 97.030
IEC 60335-1:2020-09/ISH1:2021-11(en)

– 2 – IEC 60335-2-109:2023 EXV © IEC 2023
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 15
4 General requirement . 27
5 General conditions for the tests . 27
6 Classification . 31
7 Marking and instructions . 32
8 Protection against access to live parts . 41
9 Starting of motor-operated appliances . 43
10 Power input and current . 43
11 Heating . 46
12 Charging of metal-ion batteries . 52
13 Leakage current and electric strength at operating temperature . 53
14 Transient overvoltages . 56
15 Moisture resistance . 57
16 Leakage current and electric strength . 59
17 Overload protection of transformers and associated circuits . 61
18 Endurance . 62
19 Abnormal operation . 62
20 Stability and mechanical hazards . 72
21 Mechanical strength . 74
22 Construction . 75
23 Internal wiring . 89
24 Components . 91
25 Supply connection and external flexible cords . 96
26 Terminals for external conductors . 104
27 Provision for earthing . 106
28 Screws and connections . 108
29 Clearances, creepage distances and solid insulation . 110
30 Resistance to heat and fire . 119
31 Resistance to rusting . 123
32 Radiation, toxicity and similar hazards . 123
Annex A (informative) Routine tests . 137
Annex B (normative) Battery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances . 139
Annex C (normative) Ageing test on motors . 160
Annex D (normative) Thermal motor protectors . 161
Annex E (normative) Needle-flame test . 162
Annex F (normative) Capacitors . 163
Annex G (normative) Safety isolating transformers . 165

Annex H (normative) Switches . 166
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 168
Annex J (normative) Coated printed circuit boards . 170
Annex K (informative) Overvoltage categories . 171
Annex L (informative) Guidance for the measurement of clearances and creepage
distances . 172
Annex M (informative) Pollution degree . 175
Annex N (normative) Proof tracking test . 176
Annex O (informative) Selection and sequence of the tests of Clause 30 . 177
Annex P (informative) Guidance for the application of this standard to appliances
used in tropical climates . 182
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits . 184
Annex R (normative) Software evaluation . 187
Annex S (informative) Guidance for the application of this standard on measurement
of power input and current based on the requirements of 10.1 and 10.2 concerning the
representative period . 201
Annex T (normative) UV-C radiation effect on non-metallic materials . 202
Annex U (normative) Appliances intended for remote communication through public
networks . 205
Bibliography . 209
Index of defined terms . 212

Figure 1 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of class II appliances and for parts of class ll construction . 124
Figure 2 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of other than class II appliances or parts of class ll
construction . 125
Figure 3 – Circuit diagram for leakage current measurement at operating temperature
for three-phase with neutral class II appliances and for parts of class ll construction . 126
Figure 4 – Circuit diagram for leakage current measurement at operating temperature
for three-phase with neutral appliances other than those of class II or parts of class ll
construction . 127
Figure 5 – Small part . 128
Figure 6 – Example of an electronic circuit with low-power points . 128
Figure 7 – Test finger nail . 129
Figure 8 – Flexing test apparatus . 130
Figure 9 – Constructions of cord anchorages . 131
Figure 10 – An example of parts of an earthing terminal . 132
Figure 11 – Examples of clearances . 133
Figure 12 – Example of the placement of the cylinder . 134
Figure 13 – Small parts cylinder . 135
Figure 14 – Example of a specified operating region of a lithium-ion cell during
charging . 136
Figure 101 – Probe for measuring surface temperatures . 136
Figure B.1 – Examples of battery-operated appliance constructions and application of
normative Annex B (1 of 2) . 157

– 4 – IEC 60335-2-109:2023 EXV © IEC 2023
Figure B.2 – Examples of correct polarity connection marking representing three
batteries . 159
Figure I.1 – Simulation of faults . 169
Figure L.1 – Sequence for the determination of clearances . 172
Figure L.2 – Sequence for the determination of creepage distances . 173
Figure L.3 – Measurement of clearances . 174
Figure O.1 – Tests for resistance to heat . 177
Figure O.2 – Selection and sequence of tests for resistance to fire in hand-held
appliances . 178
Figure O.3 – Selection and sequence of tests for resistance to fire in attended
appliances . 178
Figure O.4 – Selection and sequence of tests for resistance to fire in unattended
appliances . 179
Figure O.5 – Some applications of the term "within a distance of 3 mm" . 181
Figure Q.1 – Flowchart outlining the sequence of tests for the evaluation of electronic

circuits (1 of 2) . 185
Figure S.1 – Flowchart giving guidance on measurement of power input and current
concerning the representative period . 201

Table 1 – Power input deviation . 43
Table 2 – Current deviation . 45
Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 48
Table 3 – Maximum normal temperature rises . 49
Table 4 – Voltage for electric strength test . 55
Table 5 – Characteristics of high-voltage sources . 56
Table 6 – Impulse test voltage . 56
Table 7 – Test voltages. 61
Table 8 – Maximum winding temperature . 65
Table 9 – Maximum abnormal temperature rise . 70
Table 10 – Dimensions of cables and conduits . 97
Table 11 – Minimum cross-sectional area of conductors . 99
Table 12 – Pull force and torque . 101
Table 13 – Nominal cross-sectional area of conductors . 105
Table 14 – Torque for testing screws and nuts . 109
Table 15 – Rated impulse voltage . 111
Table 16 – Minimum clearances . 112
Table 17 – Minimum creepage distances for basic insulation . 116
Table 18 – Minimum creepage distances for functional insulation . 117
Table 19 – Minimum thickness for accessible parts of reinforced insulation consisting
of a single layer . 119
Table A.1 – Test voltages . 138
Table B.1 – Artificial source characteristics . 141
Table B.2 – Total area of openings for metal-ion cells . 149
Table B.3 – Volume of air injected at 2 070 kPa . 149
Table C.1 – Test conditions . 160

Table R.1 – General fault/error conditions . 189
Table R.2 – Specific fault/error conditions . 191
Table R.3 – Semi-formal methods . 197
Table R.4 – Software architecture specification . 197
Table R.5 – Module design specification . 198
Table R.6 – Design and coding standards . 199
Table R.7 – Software safety validation . 199
Table T.1 – Minimum property retention limits after UV-C exposure . 203
Table T.2 – Minimum electric strength for internal wiring after UV-C exposure . 204
Table U.1 – Examples of acceptable measures against unauthorised access and
transmission fault/error modes . 207

– 6 – IEC 60335-2-109:2023 EXV © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-109: Particular requirements
for UV radiation water treatment appliances

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s).
IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect
thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which may
be required to implement this document. However, implementers are cautioned that this may not represent the
latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC shall
not be held responsible for identifying any or all such patent rights.
This extended version (EXV) of the official IEC Standard provides the user with the
comprehensive content of the Standard.
made to IEC 60335-1:2020.
The specific content of IEC 60335-2-109:2023 is displayed on a blue background.

IEC 60335-2-109 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This second edition cancels and replaces the first edition published in 2010, Amendment 1:2013
and Amendment 2:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with IEC 60335-1:2020;
b) modification or conversion of some notes to normative text (Clause 1, 6.2, 22.102);
c) introduction of IEC 60417 symbol for maximum operating depth (7.1, 7.6, 7.12.1);
d) addition of external accessible surface temperature limits (11.3, 11.8);
e) clarification of requirements for remote operation (22.40, 22.49, 22.51);
f) the requirements to emit harmful radiation are deleted, because they are covered in Part 1
(Clause 32).
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7011/FDIS 61/7075/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert
that publication into the IEC standard: Particular requirements for UV radiation water treatment
appliances.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies as
far as is reasonable. When this standard states “addition”, “modification” or “replacement”, the
relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:

– 8 – IEC 60335-2-109:2023 EXV © IEC 2023
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations can need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation nationally
not earlier than 12 months or later than 36 months from the date of publication.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules can differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with in
Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal publications, basic safety publications and group safety publications covering a hazard are not
applicable since they have been taken into consideration when developing the general and particular requirements
for the IEC 60335 series of standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of the
requirements and, if found to be substantially equivalent, may be considered to comply with the
standard.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.

– 10 – IEC 60335-2-109:2023 EXV © IEC 2023
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-109: Particular requirements
for UV radiation water treatment appliances

1 Scope
This part of IEC 60335 deals with the safety of UV radiation water treatment appliances for
household and similar use, their rated voltage being not more than 250 V for single-phase
appliances and 480 V for other appliances including direct current (DC) supplied appliances
and battery-operated appliances.
Appliances not intended for normal household use but that nevertheless can be a source of
danger to the public, such as appliances intended to be used by laymen in shops and in light
industry and farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances
that are encountered by all persons in and around the home. However, in general, it does not
take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional
requirements can be necessary;
– in many countries, additional requirements are specified by the national health authorities,
the national authorities responsible for the protection of labour and similar authorities.
This standard does not apply to
– pumps (IEC 60335-2-41);
– luminaires for aquariums (IEC 60598-2-11);
– luminaires for swimming pools and similar applications (IEC 60598-2-18);
– appliances intended exclusively for professional use;
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60034-1, Rotating electrical machines – Part 1: Rating and performance

IEC 60061-1, Lamp caps and holders together with gauges for the control of interchangeability
and safety – Part 1: Lamp caps
IEC 60065:2014, Audio, video and similar electronic apparatus – Safety requirements
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-31, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling shocks,
primarily for equipment-type specimens
IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state
IEC TR 60083, Plugs and socket-outlets for domestic and similar general use standardized in
member countries of IEC
IEC 60085:2007, Electrical insulation – Thermal evaluation and designation
IEC 60112:2003, Method for the determination of the proof and the comparative tracking indices
of solid insulating materials
IEC 60112:2003/AMD1:2009
IEC 60127 (all parts), Miniature fuses
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
IEC 60227-5:2011, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 5: Flexible cables (cords)
IEC 60238, Edison screw lampholders
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including 450/750 V
IEC 60252-1:2010, AC motor capacitors – Part 1: General – Performance, testing and rating –
Safety requirements – Guidance for installation and operation
IEC 60252-1:2010/AMD1:2013
IEC 60309-2, Plugs, socket-outlets and couplers for industrial purposes – Part 2: Dimensional
interchangeability requirements for pin and contact-tube accessories
IEC 60320 (all parts), Appliance couplers for household and similar general purposes
IEC 60320-1, Appliance couplers for household and similar general purposes – Part 1: General
requirements
IEC 60320-2-3, Appliance couplers for household and similar general purposes – Part 2-3:
Appliance couplers with a degree of protection higher than IPX0
___________
There exists a consolidated edition 4.1:2009 that includes edition 4 and its Amendment 1.
There exists a consolidated edition 2.1:2013 that includes edition 2 and its Amendment 1.

– 12 – IEC 60335-2-109:2023 EXV © IEC 2023
IEC 60320-3, Appliance couplers for household and similar general purposes – Part 3: Standard
sheets and gauges
IEC 60384-14:2013, Fixed capacitors for use in electronic equipment – Part 14: Sectional
specification – Fixed capacitors for electromagnetic interference suppression and connection
to the supply mains
IEC 60384-14:2013/AMD1:2016
IEC 60417, Graphical symbols for use on equipment
IEC 60445:2017, Basic and safety principles for man-machine interface, marking and
identification – Identification of equipment terminals, conductor terminations and conductors
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)

IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
IEC 60598-1:2020, Luminaires − Part 1: General requirements and tests
IEC 60603-11, Connectors for frequencies below 3 MHz for use with printed boards – Part 11:
Detail specification for concentric connectors (dimensions for free connectors and fixed
connectors)
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60664-3:2016, Insulation coordination for equipment within low-voltage systems – Part 3:
Use of coating, potting or moulding for protection against pollution
IEC 60664-4:2005, Insulation coordination for equipment within low-voltage systems – Part 4:
Consideration of high-frequency voltage stress
IEC 60691, Thermal-links – Requirements and application guide
IEC 60695-2-11:2014, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (GWEPT)
IEC 60695-2-12, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods – Glow-
wire flammability index (GWFI) test method for materials
IEC 60695-2-13, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods – Glow-
wire ignition temperature (GWIT) test method for materials
IEC 60695-10-2, Fire hazard testing – Part 10-2: Abnormal heat – Ball pressure test
IEC 60695-11-5:2016, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method
– Apparatus, confirmatory test arrangement and guidance
___________
There exists a consolidated edition 4.1:2016 that includes edition 4 and its Amendment 1.
There exists a consolidated edition 2.2:2013 that includes edition 2 and its Amendment 1 and Amendment 2.

IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical
flame test methods
IEC 60730-1:2013, Automatic electrical controls – Part 1: General requirements
IEC 60730-1:2013/AMD1:2015
IEC 60730-2-8:2018, Automatic electrical controls – Part 2-8: Particular requirements for
electrically operated water valves, including mechanical requirements
IEC 60730-2-9:2015, Automatic electrical controls – Part 2-9: Particular requirements for
temperature sensing controls
IEC 60730-2-9:2015/AMD1:2018
IEC 60730-2-10, Automatic electrical controls for household and similar use – Part 2-10:
Particular requirements for motor-starting relays
IEC 60738-1, Thermistors – Directly heated positive temperature coefficient – Part 1: Generic
specification
IEC 60799, Electrical accessories – Cord sets and interconnection cord sets
IEC 60906-1, IEC system of plugs and socket-outlets for household and similar purposes –
Part 1: Plugs and socket-outlets 16 A 250 V a.c.
IEC 60934, Circuit-breakers for equipment (CBE)
IEC 60990:2016, Methods of measurement of touch current and protective conductor current
IEC 60999-1:1999, Connecting devices – Electrical copper conductors – Safety requirements
for screw-type and screwless-type clamping units – Part 1: General requirements and particular
2 2
requirements for clamping units for conductors from 0,2 mm up to 35 mm (included)
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement
techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test
IEC 61000-4-6, Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement
techniques – Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-4-11:2020, Electromagnetic compatibility (EMC) – Part 4-11: Testing and measure-
ment techniques – Voltage dips, short interruptions and voltage variations immunity tests for
equipment with input current up to 16 A per phase
___________
There exists a consolidated edition 5.1:2015 that includes edition 5 and its Amendment 1.
There exists a consolidated edition 4.1:2018 that includes edition 4 and its Amendment 1.

– 14 – IEC 60335-2-109:2023 EXV © IEC 2023
IEC 61000-4-13:2002, Electromagnetic compatibility (EMC) – Part 4-13: Testing and
measurement techniques – Harmonics and interharmonics including mai
...

IEC 60335-2-109 ®
Edition 2.0 2023-12
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60335-2-109:2023 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-109: Particular requirements for UV radiation water treatment appliances

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IEC 60335-2-109 ®
Edition 2.0 2023-12
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60335-2-109:2023 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-109: Particular requirements for UV radiation water treatment appliances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120, 97.030 ISBN 978-2-8322-7989-2

IEC 60335-1:2020/ISH1:2021 – 1 –
© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 60335-1
Edition 6.0  2020-09
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –

Part 1: General requirements
INTERPRETATION SHEET 1
This interpretation sheet has been prepared by IEC technical committee 61: Safety of
household and similar electrical appliances.
The text of this Interpretation Sheet is based on the following documents:
Draft Report on voting
61/5999/DISH 61/6009/RVDISH
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
___________
INTRODUCTION
Edition 6 of IEC 60335-1:2020 defines and introduces requirements for a detachable
power supply part of an appliance. In the document, 24.2 prohibits the use of a power
supply in a flexible cord.
QUESTION:
Does Subclause 24.2 prohibit the use of a detachable power supply part?
ANSWER
No, a "detachable power supply part" is a defined term and is not captured by the term
"power supply" as used in Subclause 24.2.
NOTE A detachable power supply part is captured by the defined term when the output of the power supply
part is detachable from the class III construction part of the appliance at:
– the power supply part, or
– the class III construction part of the appliance.
However, the supply cord (if any) does not have to be detachable from the detachable power supply part.
ICS 13.120; 97.030
IEC 60335-1:2020-09/ISH1:2021-11(en)

– 2 – IEC 60335-2-109:2023 EXV © IEC 2023
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 15
4 General requirement . 27
5 General conditions for the tests . 27
6 Classification . 31
7 Marking and instructions . 32
8 Protection against access to live parts . 41
9 Starting of motor-operated appliances . 43
10 Power input and current . 43
11 Heating . 46
12 Charging of metal-ion batteries . 52
13 Leakage current and electric strength at operating temperature . 53
14 Transient overvoltages . 56
15 Moisture resistance . 57
16 Leakage current and electric strength . 59
17 Overload protection of transformers and associated circuits . 61
18 Endurance . 62
19 Abnormal operation . 62
20 Stability and mechanical hazards . 72
21 Mechanical strength . 74
22 Construction . 75
23 Internal wiring . 89
24 Components . 91
25 Supply connection and external flexible cords . 96
26 Terminals for external conductors . 104
27 Provision for earthing . 106
28 Screws and connections . 108
29 Clearances, creepage distances and solid insulation . 110
30 Resistance to heat and fire . 119
31 Resistance to rusting . 123
32 Radiation, toxicity and similar hazards . 123
Annex A (informative) Routine tests . 137
Annex B (normative) Battery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances . 139
Annex C (normative) Ageing test on motors . 160
Annex D (normative) Thermal motor protectors . 161
Annex E (normative) Needle-flame test . 162
Annex F (normative) Capacitors . 163
Annex G (normative) Safety isolating transformers . 165

Annex H (normative) Switches . 166
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 168
Annex J (normative) Coated printed circuit boards . 170
Annex K (informative) Overvoltage categories . 171
Annex L (informative) Guidance for the measurement of clearances and creepage
distances . 172
Annex M (informative) Pollution degree . 175
Annex N (normative) Proof tracking test . 176
Annex O (informative) Selection and sequence of the tests of Clause 30 . 177
Annex P (informative) Guidance for the application of this standard to appliances
used in tropical climates . 182
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits . 184
Annex R (normative) Software evaluation . 187
Annex S (informative) Guidance for the application of this standard on measurement
of power input and current based on the requirements of 10.1 and 10.2 concerning the
representative period . 201
Annex T (normative) UV-C radiation effect on non-metallic materials . 202
Annex U (normative) Appliances intended for remote communication through public
networks . 205
Bibliography . 209
Index of defined terms . 212

Figure 1 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of class II appliances and for parts of class ll construction . 124
Figure 2 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of other than class II appliances or parts of class ll
construction . 125
Figure 3 – Circuit diagram for leakage current measurement at operating temperature
for three-phase with neutral class II appliances and for parts of class ll construction . 126
Figure 4 – Circuit diagram for leakage current measurement at operating temperature
for three-phase with neutral appliances other than those of class II or parts of class ll
construction . 127
Figure 5 – Small part . 128
Figure 6 – Example of an electronic circuit with low-power points . 128
Figure 7 – Test finger nail . 129
Figure 8 – Flexing test apparatus . 130
Figure 9 – Constructions of cord anchorages . 131
Figure 10 – An example of parts of an earthing terminal . 132
Figure 11 – Examples of clearances . 133
Figure 12 – Example of the placement of the cylinder . 134
Figure 13 – Small parts cylinder . 135
Figure 14 – Example of a specified operating region of a lithium-ion cell during
charging . 136
Figure 101 – Probe for measuring surface temperatures . 136
Figure B.1 – Examples of battery-operated appliance constructions and application of
normative Annex B (1 of 2) . 157

– 4 – IEC 60335-2-109:2023 EXV © IEC 2023
Figure B.2 – Examples of correct polarity connection marking representing three
batteries . 159
Figure I.1 – Simulation of faults . 169
Figure L.1 – Sequence for the determination of clearances . 172
Figure L.2 – Sequence for the determination of creepage distances . 173
Figure L.3 – Measurement of clearances . 174
Figure O.1 – Tests for resistance to heat . 177
Figure O.2 – Selection and sequence of tests for resistance to fire in hand-held
appliances . 178
Figure O.3 – Selection and sequence of tests for resistance to fire in attended
appliances . 178
Figure O.4 – Selection and sequence of tests for resistance to fire in unattended
appliances . 179
Figure O.5 – Some applications of the term "within a distance of 3 mm" . 181
Figure Q.1 – Flowchart outlining the sequence of tests for the evaluation of electronic

circuits (1 of 2) . 185
Figure S.1 – Flowchart giving guidance on measurement of power input and current
concerning the representative period . 201

Table 1 – Power input deviation . 43
Table 2 – Current deviation . 45
Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 48
Table 3 – Maximum normal temperature rises . 49
Table 4 – Voltage for electric strength test . 55
Table 5 – Characteristics of high-voltage sources . 56
Table 6 – Impulse test voltage . 56
Table 7 – Test voltages. 61
Table 8 – Maximum winding temperature . 65
Table 9 – Maximum abnormal temperature rise . 70
Table 10 – Dimensions of cables and conduits . 97
Table 11 – Minimum cross-sectional area of conductors . 99
Table 12 – Pull force and torque . 101
Table 13 – Nominal cross-sectional area of conductors . 105
Table 14 – Torque for testing screws and nuts . 109
Table 15 – Rated impulse voltage . 111
Table 16 – Minimum clearances . 112
Table 17 – Minimum creepage distances for basic insulation . 116
Table 18 – Minimum creepage distances for functional insulation . 117
Table 19 – Minimum thickness for accessible parts of reinforced insulation consisting
of a single layer . 119
Table A.1 – Test voltages . 138
Table B.1 – Artificial source characteristics . 141
Table B.2 – Total area of openings for metal-ion cells . 149
Table B.3 – Volume of air injected at 2 070 kPa . 149
Table C.1 – Test conditions . 160

Table R.1 – General fault/error conditions . 189
Table R.2 – Specific fault/error conditions . 191
Table R.3 – Semi-formal methods . 197
Table R.4 – Software architecture specification . 197
Table R.5 – Module design specification . 198
Table R.6 – Design and coding standards . 199
Table R.7 – Software safety validation . 199
Table T.1 – Minimum property retention limits after UV-C exposure . 203
Table T.2 – Minimum electric strength for internal wiring after UV-C exposure . 204
Table U.1 – Examples of acceptable measures against unauthorised access and
transmission fault/error modes . 207

– 6 – IEC 60335-2-109:2023 EXV © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-109: Particular requirements
for UV radiation water treatment appliances

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s).
IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect
thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which may
be required to implement this document. However, implementers are cautioned that this may not represent the
latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC shall
not be held responsible for identifying any or all such patent rights.
This extended version (EXV) of the official IEC Standard provides the user with the
comprehensive content of the Standard.
made to IEC 60335-1:2020.
The specific content of IEC 60335-2-109:2023 is displayed on a blue background.

IEC 60335-2-109 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This second edition cancels and replaces the first edition published in 2010, Amendment 1:2013
and Amendment 2:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with IEC 60335-1:2020;
b) modification or conversion of some notes to normative text (Clause 1, 6.2, 22.102);
c) introduction of IEC 60417 symbol for maximum operating depth (7.1, 7.6, 7.12.1);
d) addition of external accessible surface temperature limits (11.3, 11.8);
e) clarification of requirements for remote operation (22.40, 22.49, 22.51);
f) the requirements to emit harmful radiation are deleted, because they are covered in Part 1
(Clause 32).
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7011/FDIS 61/7075/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert
that publication into the IEC standard: Particular requirements for UV radiation water treatment
appliances.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies as
far as is reasonable. When this standard states “addition”, “modification” or “replacement”, the
relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:

– 8 – IEC 60335-2-109:2023 EXV © IEC 2023
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations can need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation nationally
not earlier than 12 months or later than 36 months from the date of publication.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules can differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with in
Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal publications, basic safety publications and group safety publications covering a hazard are not
applicable since they have been taken into consideration when developing the general and particular requirements
for the IEC 60335 series of standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of the
requirements and, if found to be substantially equivalent, may be considered to comply with the
standard.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.

– 10 – IEC 60335-2-109:2023 EXV © IEC 2023
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-109: Particular requirements
for UV radiation water treatment appliances

1 Scope
This part of IEC 60335 deals with the safety of UV radiation water treatment appliances for
household and similar use, their rated voltage being not more than 250 V for single-phase
appliances and 480 V for other appliances including direct current (DC) supplied appliances
and battery-operated appliances.
Appliances not intended for normal household use but that nevertheless can be a source of
danger to the public, such as appliances intended to be used by laymen in shops and in light
industry and farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances
that are encountered by all persons in and around the home. However, in general, it does not
take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional
requirements can be necessary;
– in many countries, additional requirements are specified by the national health authorities,
the national authorities responsible for the protection of labour and similar authorities.
This standard does not apply to
– pumps (IEC 60335-2-41);
– luminaires for aquariums (IEC 60598-2-11);
– luminaires for swimming pools and similar applications (IEC 60598-2-18);
– appliances intended exclusively for professional use;
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60034-1, Rotating electrical machines – Part 1: Rating and performance

IEC 60061-1, Lamp caps and holders together with gauges for the control of interchangeability
and safety – Part 1: Lamp caps
IEC 60065:2014, Audio, video and similar electronic apparatus – Safety requirements
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-31, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling shocks,
primarily for equipment-type specimens
IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state
IEC TR 60083, Plugs and socket-outlets for domestic and similar general use standardized in
member countries of IEC
IEC 60085:2007, Electrical insulation – Thermal evaluation and designation
IEC 60112:2003, Method for the determination of the proof and the comparative tracking indices
of solid insulating materials
IEC 60112:2003/AMD1:2009
IEC 60127 (all parts), Miniature fuses
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
IEC 60227-5:2011, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 5: Flexible cables (cords)
IEC 60238, Edison screw lampholders
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including 450/750 V
IEC 60252-1:2010, AC motor capacitors – Part 1: General – Performance, testing and rating –
Safety requirements – Guidance for installation and operation
IEC 60252-1:2010/AMD1:2013
IEC 60309-2, Plugs, socket-outlets and couplers for industrial purposes – Part 2: Dimensional
interchangeability requirements for pin and contact-tube accessories
IEC 60320 (all parts), Appliance couplers for household and similar general purposes
IEC 60320-1, Appliance couplers for household and similar general purposes – Part 1: General
requirements
IEC 60320-2-3, Appliance couplers for household and similar general purposes – Part 2-3:
Appliance couplers with a degree of protection higher than IPX0
___________
There exists a consolidated edition 4.1:2009 that includes edition 4 and its Amendment 1.
There exists a consolidated edition 2.1:2013 that includes edition 2 and its Amendment 1.

– 12 – IEC 60335-2-109:2023 EXV © IEC 2023
IEC 60320-3, Appliance couplers for household and similar general purposes – Part 3: Standard
sheets and gauges
IEC 60384-14:2013, Fixed capacitors for use in electronic equipment – Part 14: Sectional
specification – Fixed capacitors for electromagnetic interference suppression and connection
to the supply mains
IEC 60384-14:2013/AMD1:2016
IEC 60417, Graphical symbols for use on equipment
IEC 60445:2017, Basic and safety principles for man-machine interface, marking and
identification – Identification of equipment terminals, conductor terminations and conductors
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)

IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
IEC 60598-1:2020, Luminaires − Part 1: General requirements and tests
IEC 60603-11, Connectors for frequencies below 3 MHz for use with printed boards – Part 11:
Detail specification for concentric connectors (dimensions for free connectors and fixed
connectors)
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60664-3:2016, Insulation coordination for equipment within low-voltage systems – Part 3:
Use of coating, potting or moulding for protection against pollution
IEC 60664-4:2005, Insulation coordination for equipment within low-voltage systems – Part 4:
Consideration of high-frequency voltage stress
IEC 60691, Thermal-links – Requirements and application guide
IEC 60695-2-11:2014, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (GWEPT)
IEC 60695-2-12, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods – Glow-
wire flammability index (GWFI) test method for materials
IEC 60695-2-13, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods – Glow-
wire ignition temperature (GWIT) test method for materials
IEC 60695-10-2, Fire hazard testing – Part 10-2: Abnormal heat – Ball pressure test
IEC 60695-11-5:2016, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method
– Apparatus, confirmatory test arrangement and guidance
___________
There exists a consolidated edition 4.1:2016 that includes edition 4 and its Amendment 1.
There exists a consolidated edition 2.2:2013 that includes edition 2 and its Amendment 1 and Amendment 2.

IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical
flame test methods
IEC 60730-1:2013, Automatic electrical controls – Part 1: General requirements
IEC 60730-1:2013/AMD1:2015
IEC 60730-2-8:2018, Automatic electrical controls – Part 2-8: Particular requirements for
electrically operated water valves, including mechanical requirements
IEC 60730-2-9:2015, Automatic electrical controls – Part 2-9: Particular requirements for
temperature sensing controls
IEC 60730-2-9:2015/AMD1:2018
IEC 60730-2-10, Automatic electrical controls for household and similar use – Part 2-10:
Particular requirements for motor-starting relays
IEC 60738-1, Thermistors – Directly heated positive temperature coefficient – Part 1: Generic
specification
IEC 60799, Electrical accessories – Cord sets and interconnection cord sets
IEC 60906-1, IEC system of plugs and socket-outlets for household and similar purposes –
Part 1: Plugs and socket-outlets 16 A 250 V a.c.
IEC 60934, Circuit-breakers for equipment (CBE)
IEC 60990:2016, Methods of measurement of touch current and protective conductor current
IEC 60999-1:1999, Connecting devices – Electrical copper conductors – Safety requirements
for screw-type and screwless-type clamping units – Part 1: General requirements and particular
2 2
requirements for clamping units for conductors from 0,2 mm up to 35 mm (included)
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement
techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test
IEC 61000-4-6, Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement
techniques – Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-4-11:2020, Electromagnetic compatibility (EMC) – Part 4-11: Testing and measure-
ment techniques – Voltage dips, short interruptions and voltage variations immunity tests for
equipment with input current up to 16 A per phase
___________
There exists a consolidated edition 5.1:2015 that includes edition 5 and its Amendment 1.
There exists a consolidated edition 4.1:2018 that includes edition 4 and its Amendment 1.

– 14 – IEC 60335-2-109:2023 EXV © IEC 2023
IEC 61000-4-13:2002, Electromagnetic compatibility (EMC) – Part 4-13: Testing and
measurement techniques – Harmonics and interharmonics including mai
...

IEC 60335-2-109 ®
Edition 2.0 2023-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-109: Particular requirements for UV radiation water treatment appliances
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IEC 60335-2-109 ®
Edition 2.0 2023-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-109: Particular requirements for UV radiation water treatment appliances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120, 97.030 ISBN 978-2-8322-7988-5

– 2 – IEC 60335-2-109:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 General requirement . 8
5 General conditions for the tests . 8
6 Classification . 9
7 Marking and instructions . 9
8 Protection against access to live parts . 11
9 Starting of motor-operated appliances . 11
10 Power input and current . 11
11 Heating . 11
12 Void Charging of metal-ion batteries . 12
13 Leakage current and electric strength at operating temperature . 12
14 Transient overvoltages . 12
15 Moisture resistance . 12
16 Leakage current and electric strength . 13
17 Overload protection of transformers and associated circuits . 13
18 Endurance . 13
19 Abnormal operation . 13
20 Stability and mechanical hazards . 13
21 Mechanical strength . 13
22 Construction . 13
23 Internal wiring . 15
24 Components . 15
25 Supply connection and external flexible cords . 15
26 Terminals for external conductors . 15
27 Provision for earthing . 16
28 Screws and connections . 16
29 Clearances, creepage distances and solid insulation . 16
30 Resistance to heat and fire . 16
31 Resistance to rusting . 16
32 Radiation, toxicity and similar hazards . 16
Annexes . 18
Bibliography . 19

Figure 101 – Probe for measuring surface temperatures . 17

Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 12

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-109: Particular requirements
for UV radiation water treatment appliances

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60335-2-109:2010+AMD1:2013+AMD2:2016 CSV. A
vertical bar appears in the margin wherever a change has been made. Additions are in
green text, deletions are in strikethrough red text.

– 4 – IEC 60335-2-109:2023 RLV © IEC 2023
IEC 60335-2-109 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This second edition cancels and replaces the first edition published in 2010, Amendment 1:2013
and Amendment 2:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with IEC 60335-1:2020;
b) modification or conversion of some notes to normative text (Clause 1, 6.2, 22.102);
c) introduction of IEC 60417 symbol for maximum operating depth (7.1, 7.6, 7.12.1);
d) addition of external accessible surface temperature limits (11.3, 11.8);
e) clarification of requirements for remote operation (22.40, 22.49, 22.51);
f) the requirements to emit harmful radiation are deleted, because they are covered in Part 1
(Clause 32).
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7011/FDIS 61/7075/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert
that publication into the IEC standard: Particular requirements for UV radiation water treatment
appliances.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies as
far as is reasonable. When this standard states “addition”, “modification” or “replacement”, the
relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:

– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations can need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation nationally
not earlier than 12 months or later than 36 months from the date of publication.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

– 6 – IEC 60335-2-109:2023 RLV © IEC 2023
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules may can differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with in
Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards Horizontal publications, basic safety publications and group safety
publications covering a hazard are not applicable since they have been taken into consideration when developing
the general and particular requirements for the IEC 60335 series of standards. For example, in the case of
temperature requirements for surfaces on many appliances, generic standards, such as ISO 13732-1 for hot surfaces,
are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of the
requirements and, if found to be substantially equivalent, may be considered to comply with the
standard.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-109: Particular requirements
for UV radiation water treatment appliances

1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of UV radiation water treatment appliances for
household and similar purposes use, their rated voltage being not more than 250 V for single-
phase appliances and 480 V for other appliances including direct current (DC) supplied
appliances and battery-operated appliances.
Appliances not intended for normal household use but that nevertheless may can be a source
of danger to the public, such as appliances intended to be used by laymen in shops and in light
industry and farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances
that are encountered by all persons in and around the home. However, in general, it does not
take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
NOTE 101 Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional
requirements may can be necessary;
– in many countries, additional requirements are specified by the national health authorities,
the national authorities responsible for the protection of labour and similar authorities.
NOTE 102 This standard does not apply to
– pumps (IEC 60335-2-41);
– luminaires for aquariums (IEC 60598-2-11);
– luminaires for swimming pools and similar applications (IEC 60598-2-18);
– appliances intended exclusively for professional use;
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).

– 8 – IEC 60335-2-109:2023 RLV © IEC 2023
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
IEC 60598-1:2020, Luminaires − Part 1: General requirements and tests
ISO 4892-2:2006, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-
arc lamps
Amendment 1 (2009)
ISO 4892-4:2004, Plastics – Methods of exposure to laboratory light sources – Part 4: Open-
flame carbon-arc lamps
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.9 Replacement Modification:
Replace the first paragraph with the following:
normal operation
operation of the appliance with water at the most onerous temperature specified in the
instructions
3.5 Definitions relating to types of appliances
3.1025.101
UV radiation water treatment appliance
appliance that treats water using electromagnetic energy at wavelengths in the ultraviolet band
using UV-C emitters
3.6 Definitions relating to parts of an appliance
3.6.101
UV-C emitter
radiating source constructed to emit non-ionizing electromagnetic energy at wavelengths of 100
nm to 280 nm
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.101 UV radiation water treatment appliances are tested as motor-operated appliances.

6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Addition:
UV radiation water treatment appliances shall be class I, class II or class III.
Appliances immersed in water shall be class III with a rated voltage not exceeding 12 V a.c.
or a no load voltage not exceeding 30 V d.c. or class I.
UV radiation water treatment appliances for use in swimming pools shall be class III with a
rated voltage not exceeding 12 V if they are immersed in the pool water, when persons are in
the pool.
6.2 Addition:
Appliances for use in water shall be IPX8.
Appliances for use above water shall be at least IPX7 unless they are intended to be fixed, in
which case they shall be at least IPX1.
Appliances intended to be used outdoors shall be at least IPX4.
NOTE 101 The wiring rules applicable to installation of appliances in locations containing items such as baths,
showers and swimming pools may can require a higher IP rating.
These requirements do not apply to class III appliances having a rated voltage not exceeding
24 V.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
UV radiation water treatment appliances containing replaceable UV-C emitters shall be
marked with the type reference of the emitter and with the substance of the following warning:
WARNING: UV radiation is dangerous for the eyes and skin. Do not operate the UV-C
emitter outside the appliance.
If it is intended that replacement of the UV-C emitter can be carried out by the user, the
appliance shall be marked with “Read the instructions” or with symbol ISO 7000-0790
(2004-01).
The appliance shall be marked with the minimum and maximum water temperatures with which
it can may be used.
The appliance shall be marked with the rated pressure if the appliance is intended to be
connected to a pressurized water system other than the water mains.
Appliances for use in water shall be marked with to indicate the maximum operating depth, if
greater than 1 m in metres, with a minimum of 1 m, using symbol IEC 60417-6444 (2020-12).

– 10 – IEC 60335-2-109:2023 RLV © IEC 2023
7.6 Addition:
. . . m
maximum operating depth
[symbol IEC 60417-6444 maximum operating depth where
(2020-12)] X specifies the value

Note 101 The indication of the maximum operating depth in metres can be located on the left or right side adjacent
to the arrows.
7.12 Addition:
The instructions for UV radiation water treatment appliances containing UV-C emitters shall
contain the substance of the following:
WARNING: Do not operate the UV-C emitter when it is removed from the appliance
enclosure.
The instructions for UV radiation water treatment appliances containing UV-C emitters shall
give details concerning
– the method, frequency of cleaning, and necessary precautions to be taken;
– precautions to be taken when replacing UV-C emitters and starters, if applicable.
The instructions of appliances containing UV-C emitters shall contain the substance of include
the following:
– if the replacement of the UV-C emitter by the user is not allowed, this must be clearly stated;
and
– the substance of the following:
• This appliance contains a UV-C emitter;
• Appliances that are obviously damaged must not be operated;
• Unintended use of the appliance or damage to the housing may result in the escape of
dangerous UV-C radiation. UV-C radiation may, even in little doses, cause harm to the
eyes and skin.
The instructions of appliances containing replaceable UV-C emitters shall also contain the
substance of the following:
– Read the maintenance instructions before opening the appliance.
– The appliance must be disconnected from the supply before replacing the UV-C emitter.
The instructions for appliances intended to be used in aquariums, garden ponds and the like,
except for those of class III construction, shall include the substance of the following:
WARNING: Disconnect the appliance from the supply before carrying out maintenance.
If symbols ISO 7000-0790 (2004-01) and IEC 60417-6444 (2020-12) are used, the meaning
shall be explained.
7.12.1 Addition:
The installation instructions shall state that the appliance is to be supplied through a residual
current device (RCD) having a rated residual operating current not exceeding 30 mA.
The installation instruction of class III appliances shall include details regarding the fixing and
location of safety isolating transformers to prevent them from falling into the water or from
being affected by water.
7.15 Addition:
The type reference of replaceable UV-C emitters shall be visible during their replacement.
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 101 may be used to measure the temperature rises of external accessible
surfaces specified in Table 101. The probe is applied with a force of 4 N ± 1 N to the surface
in such a way that the best possible contact between the probe and the surface is ensured. The
measurement is performed after a contact period of 30 s.
The probe may be held in place using a laboratory stand clamp or similar device. Any measuring
instrument giving the same results as the probe may be used.
11.7 Replacement Modification:
Replace the first paragraph with the following:
Appliances are operated until steady conditions are established.
11.8 Modification:
Replace the first paragraph with the following:
During the test, the temperature rises are monitored continuously and shall not exceed the
values shown in Table 3 and Table 101.

– 12 – IEC 60335-2-109:2023 RLV © IEC 2023
Table 101 – Maximum temperature rises
for specified external accessible surfaces under normal operating conditions
a
Surface Temperature rise of external accessible surfaces
K
Surfaces of appliances Surfaces of appliances
situated not more than situated more than 850 mm
850 mm above the floor after above the floor after
installation or in normal use installation or in normal use
Bare metal 38 42
b
Coated metal 42 49
Glass and ceramic 51 56
c, d
Plastic and plastic coating > 0,4 mm 58 62
NOTE The temperature rise limits of handles, knobs, grips, keyboards, keypads and similar parts are specified in
Table 3.
a
Temperature rises are not measured on:
– the underside of appliances intended to be used on a working surface or floor; where these surfaces are
inaccessible to a 75 mm diameter probe having a hemispherical end;
– the rear surface of appliances which, according to the instructions, shall be placed against a wall and where
these surfaces are inaccessible to a 75 mm diameter probe having a hemispherical end.
b
Metal is considered coated when a coating having a minimum thickness of 90 µm made of enamel, powder or
non-substantially plastic coating is used.
c
The temperature rise limit of plastic also applies for plastic material having a metal finish of thickness less than
0,1 mm.
d
When the thickness of the plastic coating does not exceed 0,4 mm, the temperature rise limits of coated metal
for underlying metal apply or the temperature rise limits for glass or ceramic material for underlying glass or

ceramic material apply.
12 Void Charging of metal-ion batteries
This clause of Part 1 is applicable.
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.1.1 Addition:
IPX8 appliances are tested as described in IEC 60529:1989 including IEC 60529:1989, 14.2.8,
and IEC 60529:1989/AMD1:1999 and IEC 60529:1989/AMD2:2013, the appliance being
immersed for a period of two hours. During the first hour of immersion, the appliance is supplied
at rated voltage; during the second hour of immersion, it is disconnected from the supply.

16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Addition:
UV radiation water treatment appliances are also subjected to the tests of 19.101 and 19.102.
19.13 Addition:
During and after the tests, the appliance shall comply with Clause 32.
19.101 UV radiation water treatment appliances are operated under the conditions of
Clause 11, but without water.
19.102 UV radiation water treatment appliances are operated under the fault conditions
specified in IEC 60598-1:2020, items a), d) and e) of 12.5.1, the appliance being supplied at
rated voltage.
The temperatures of ballast windings shall not exceed the values specified in
IEC 60598-1:2020, 12.5.2 when measured under the conditions specified.
20 Stability and mechanical hazards
This clause of Part 1 is applicable.
21 Mechanical strength
This clause of Part 1 is applicable.
22 Construction
This clause of Part 1 is applicable except as follows.
22.33 Addition:
Water is allowed to be in contact with reinforced insulation of UV radiation water treatment
appliances used in aquariums and having a glass enclosure.

– 14 – IEC 60335-2-109:2023 RLV © IEC 2023
22.40 Addition:
UV radiation water treatment appliances are not considered to be appliances that could give
rise to a hazard if operated continuously, automatically or remotely.
22.47 Addition:
For appliances intended to only be connected to a pressurized water system, other than the
water mains, the test is carried out at 1,5 times the marked rated pressure.
22.49 Not applicable.
22.51 Not applicable.
22.101 Class I UV radiation water treatment appliances having an enclosure of non-metallic
material shall be constructed so that leakage of liquids does not result in a hazard.
Compliance is checked by the following test.
A hole is made in the enclosure in the most unfavourable location.
The appliance is placed in the most unfavourable position that is possible according to the
instructions. Water containing approximately 1 % NaCI is poured into the enclosure at a rate of
approximately 100 ml/min, avoiding live parts. The accumulating water shall come into contact
with earthed metal before reaching live parts.
22.102 In UV radiation water treatment appliances, no UV radiation shall be discharged
from the appliance
– before, during or after installation;
– during operation;
– during maintenance;
– during cleaning;
– during replacement of the UV-C emitter.
NOTE This requirement may be met by mechanical construction, or by a switch that de-
energizes the UV-C emitter.
Compliance is checked by inspection and by the tests of Clause 32. It shall not be possible to
operate the switch, if any, with test probe B of IEC 61032 applied with a force of 5 N.
22.103 If the replacement of the UV-C emitter is allowed by the user, the appliance shall be
constructed so that
– the replacement of the UV-C emitter is easily possible;
– the UV-C emitter is correctly sealed after replacement;
– if screws, seals or components are omitted or incorrectly positioned or fastened, the
appliance is rendered inoperable or manifestly incomplete.
Compliance is checked by inspection and, for parts that are likely to be removed for the UV-C
emitter replacement, by disassembling and assembling these parts ten times, followed by the
tests of 15.1.2 and Clause 32.

22.104 If the replacement of the UV-C emitter by the user is not intended, this shall be
prevented by the construction of the appliance.
Compliance is checked by inspection and, if necessary, by manual test.
22.105 In class II appliances, there shall be no conductive connection between the UV-C
emitter and the supply mains. The insulation between the UV-C emitter and the supply mains
shall be at least reinforced insulation. In addition, the inlet and outlet water points shall be
maintained at the same potential under both normal operation and under abnormal operation
as specified in Clause 19.
Compliance is checked by inspection, measurements and appropriate tests.
22.106 Class III appliances immersed in water shall have a rated voltage not exceeding
12 V AC or 30 V DC. However, class III appliances for use in swimming pools shall have a
rated voltage not exceeding 12 V if they are intended to be immersed in the pool water when
persons are in the pool.
Compliance is checked by inspection and measurement.
23 Internal wiring
This clause of Part 1 is applicable.
23.5 Addition:
Internal wiring that is exposed to UV radiation shall be conditioned in accordance with
Annex AA. A voltage of 2 000 V is applied for 15 min between the conductor and metal foil
wrapped around insulation. There shall be no breakdown.
24 Components
This clause of Part 1 is applicable.
25 Supply connection and external flexible cords
This clause of Part 1 is applicable except as follows.
25.5 Addition:
Type X attachment is not allowed for IPX7 or IPX8 appliances.
Type Z attachment is allowed.
25.7 Addition:
The supply cord of appliances intended for outdoor use, other than class III appliances, shall
be polychloroprene sheathed and not be lighter than ordinary polychloroprene sheathed cord
(code designation 60245 IEC 57).
26 Terminals for external conductors
This clause of Part 1 is applicable.

– 16 – IEC 60335-2-109:2023 RLV © IEC 2023
27 Provision for earthing
This clause of Part 1 is applicable except as follows.
27.1 Addition:
Unless the water is insulated from live parts by double insulation, the inlet and outlet pipes
of class I appliances shall
– contain a metal sieve reliably connected to the earthing terminal; or
– be of metal and permanently and reliably connected to the earthing terminal. The other
accessible metal parts of the appliance in contact with the water shall also be permanently
and reliably connected to the earthing terminal.
28 Screws and connections
This clause of Part 1 is applicable.
29 Clearances, creepage distances and solid insulation
This clause of Part 1 is applicable.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.2.2 Not applicable.
31 Resistance to rusting
This clause of Part 1 is applicable.
32 Radiation, toxicity and similar hazards
This clause of Part 1 is replaced by the following applicable except as follows.
32.101 Appliances shall not emit radiation in hazardous amount.
Compliance is checked by the following test.
The appliance is supplied at rated voltage and operated under normal operation. The
irradiance is measured at a distance of 300 mm, the measuring instrument being positioned so
that the highest radiation is recorded. If the appliance has an inspection window, the measuring
distance is reduced to 0 mm.
The measuring instrument used shall measure the mean irradiance over a circular area having
a diameter not exceeding 20 mm. The response of the instrument shall be proportional to the
cosine of the angle between incident radiation and the normal to the circular area. The spectral
irradiance shall be measured at intervals not exceeding 2,5 nm in an appropriate
spectroradiometric system. The spectroradiometer shall have a bandwidth not exceeding
2,5 nm.
NOTE 101 A bandwidth of 1 nm is advisable for greater measurement accuracy in cases where a rapid change of
the spectral energy occurs within a small bandwidth area.

The irradiance is measured when the radiation from the UV-C emitter has stabilized.
Appliances shall have a total irradiance not exceeding 0,003 W/m , for wavelengths between
200 nm and 280 nm.
NOTE 102 The total irradiance is given by
280 nm
I = E Δλ
λ
∑
200 nm
where
I is the total irradiance;
E is the spectral irradiance in W/m nm;
λ
∆ λ is the wavelength interval in nm.
32.10232.101 The ozone concentration produced by UV radiation water treatment
appliances for indoor use shall not be excessive.
Compliance is checked by the following test that is carried out in a room without openings
having dimensions of 2,5 m × 3,5 m × 3,0 m, the walls being covered with polyethylene sheet.
The room is maintained at approximately 25 °C and 50 % relative humidity. The UV radiation
water treatment appliance is positioned in accordance with the instructions, supplied at rated
voltage and then operated until steady conditions are reached.
The ozone sampling tube is located 10 mm from the appliance. The background ozone
concentration measured prior to the test is subtracted from the maximum concentration
measured during the test.
-6
The percentage of ozone in the room shall not exceed 5 × 10 .

Key
A adhesive
B thermocouple wires 0,3 mm diameter to IEC 60584-1 Type K
C handle arrangement permitting a contact force of 4 N ± 1 N
D polycarbonate tube: inside diameter 3 mm, outside diameter 5 mm
E tinned copper disc: 5 mm diameter, 0,5 mm thick with flat contact face
Figure 101 – Probe for measuring surface temperatures

– 18 – IEC 60335-2-109:2023 RLV © IEC 2023
Annexes
The annexes of Part 1 are applicable.

Bibliography
The bibliography of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-41, Household and similar electrical appliances – Safety – Part 2-41: Particular
requirements for pumps
IEC 60598-2-11, Luminaires – Part 2-11: Particular requirements – Aquarium luminaires
IEC 60598-2-18, Luminaires – Part 2-18: Particular requirements – Luminaires for swimming
pools and similar applications
___________
IEC 60335-2-109 ®
Edition 2.0 2023-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-109: Particular requirements for UV radiation water treatment appliances

Appareils électrodomestiques et analogues – Securité –
Partie 2-109: Exigences particulières pour les appareils de traitement de l'eau
par rayonnements ultraviolets
– 2 – IEC 60335-2-109:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirement . 8
5 General conditions for the tests . 8
6 Classification . 8
7 Marking and instructions .
...

IEC 60335-2-109 ®
Edition 2.0 2023-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-109: Particular requirements for UV radiation water treatment appliances

Appareils électrodomestiques et analogues – Securité –
Partie 2-109: Exigences particulières pour les appareils de traitement de l'eau
par rayonnements ultraviolets
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IEC 60335-2-109 ®
Edition 2.0 2023-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-109: Particular requirements for UV radiation water treatment appliances

Appareils électrodomestiques et analogues – Securité –

Partie 2-109: Exigences particulières pour les appareils de traitement de l'eau

par rayonnements ultraviolets
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120, 97.030 ISBN 978-2-8322-7817-8

– 2 – IEC 60335-2-109:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirement . 8
5 General conditions for the tests . 8
6 Classification . 8
7 Marking and instructions . 9
8 Protection against access to live parts . 10
9 Starting of motor-operated appliances . 11
10 Power input and current . 11
11 Heating . 11
12 Charging of metal-ion batteries . 12
13 Leakage current and electric strength at operating temperature . 12
14 Transient overvoltages . 12
15 Moisture resistance . 12
16 Leakage current and electric strength . 13
17 Overload protection of transformers and associated circuits . 13
18 Endurance . 13
19 Abnormal operation . 13
20 Stability and mechanical hazards . 13
21 Mechanical strength . 13
22 Construction . 13
23 Internal wiring . 15
24 Components . 15
25 Supply connection and external flexible cords . 15
26 Terminals for external conductors . 15
27 Provision for earthing . 15
28 Screws and connections . 16
29 Clearances, creepage distances and solid insulation . 16
30 Resistance to heat and fire . 16
31 Resistance to rusting . 16
32 Radiation, toxicity and similar hazards . 16
Annexes . 18
Bibliography . 19

Figure 101 – Probe for measuring surface temperatures . 17

Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 12

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-109: Particular requirements
for UV radiation water treatment appliances

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60335-2-109 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This second edition cancels and replaces the first edition published in 2010, Amendment 1:2013
and Amendment 2:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with IEC 60335-1:2020;
b) modification or conversion of some notes to normative text (Clause 1, 6.2, 22.102);
c) introduction of IEC 60417 symbol for maximum operating depth (7.1, 7.6, 7.12.1);

– 4 – IEC 60335-2-109:2023 © IEC 2023
d) addition of external accessible surface temperature limits (11.3, 11.8);
e) clarification of requirements for remote operation (22.40, 22.49, 22.51);
f) the requirements to emit harmful radiation are deleted, because they are covered in Part 1
(Clause 32).
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7011/FDIS 61/7075/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert
that publication into the IEC standard: Particular requirements for UV radiation water treatment
appliances.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies as
far as is reasonable. When this standard states “addition”, “modification” or “replacement”, the
relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations can need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation nationally
not earlier than 12 months or later than 36 months from the date of publication.

– 6 – IEC 60335-2-109:2023 © IEC 2023
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules can differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with in
Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal publications, basic safety publications and group safety publications covering a hazard are not
applicable since they have been taken into consideration when developing the general and particular requirements
for the IEC 60335 series of standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of the
requirements and, if found to be substantially equivalent, may be considered to comply with the
standard.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-109: Particular requirements
for UV radiation water treatment appliances

1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of UV radiation water treatment appliances for
household and similar use, their rated voltage being not more than 250 V for single-phase
appliances and 480 V for other appliances including direct current (DC) supplied appliances
and battery-operated appliances.
Appliances not intended for normal household use but that nevertheless can be a source of
danger to the public, such as appliances intended to be used by laymen in shops and in light
industry and farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances
that are encountered by all persons in and around the home. However, in general, it does not
take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional
requirements can be necessary;
– in many countries, additional requirements are specified by the national health authorities,
the national authorities responsible for the protection of labour and similar authorities.
This standard does not apply to
– pumps (IEC 60335-2-41);
– luminaires for aquariums (IEC 60598-2-11);
– luminaires for swimming pools and similar applications (IEC 60598-2-18);
– appliances intended exclusively for professional use;
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
– 8 – IEC 60335-2-109:2023 © IEC 2023
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
IEC 60598-1:2020, Luminaires − Part 1: General requirements and tests
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.9 Modification:
Replace the first paragraph with the following:
operation of the appliance with water at the most onerous temperature specified in the
instructions
3.5 Definitions relating to types of appliances
3.5.101
UV radiation water treatment appliance
appliance that treats water using electromagnetic energy at wavelengths in the ultraviolet band
using UV-C emitters
3.6 Definitions relating to parts of an appliance
3.6.101
UV-C emitter
radiating source constructed to emit non-ionizing electromagnetic energy at wavelengths of
100 nm to 280 nm
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.101 UV radiation water treatment appliances are tested as motor-operated appliances.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Addition:
UV radiation water treatment appliances shall be class I, class II or class III.
Appliances immersed in water shall be class III or class I.
UV radiation water treatment appliances for use in swimming pools shall be class III.

6.2 Addition:
Appliances for use in water shall be IPX8.
Appliances for use above water shall be at least IPX7 unless they are intended to be fixed, in
which case they shall be at least IPX1.
Appliances intended to be used outdoors shall be at least IPX4.
NOTE 101 The wiring rules applicable to installation of appliances in locations containing items such as baths,
showers and swimming pools can require a higher IP rating.
These requirements do not apply to class III appliances having a rated voltage not exceeding
24 V.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
UV radiation water treatment appliances containing replaceable UV-C emitters shall be
marked with the type reference of the emitter and with the substance of the following warning:
WARNING: UV radiation is dangerous for the eyes and skin. Do not operate the UV-C
emitter outside the appliance.
If it is intended that replacement of the UV-C emitter can be carried out by the user, the
appliance shall be marked with “Read the instructions” or with symbol ISO 7000-0790
(2004-01).
The appliance shall be marked with the minimum and maximum water temperatures with which
it may be used.
The appliance shall be marked with the rated pressure if the appliance is intended to be
connected to a pressurized water system other than the water mains.
Appliances for use in water shall be marked to indicate the maximum operating depth, in metres,
with a minimum of 1 m, using symbol IEC 60417-6444 (2020-12).
7.6 Addition:
[symbol IEC 60417-6444 maximum operating depth where
(2020-12)] X specifies the value

Note 101 The indication of the maximum operating depth in metres can be located on the left or right side adjacent
to the arrows.
– 10 – IEC 60335-2-109:2023 © IEC 2023
7.12 Addition:
The instructions for UV radiation water treatment appliances containing UV-C emitters shall
contain the substance of the following:
WARNING: Do not operate the UV-C emitter when it is removed from the appliance
enclosure.
The instructions for UV radiation water treatment appliances containing UV-C emitters shall
give details concerning
– the method, frequency of cleaning, and necessary precautions to be taken;
– precautions to be taken when replacing UV-C emitters and starters, if applicable.
The instructions of appliances containing UV-C emitters shall include the following:
– if the replacement of the UV-C emitter by the user is not allowed, this must be clearly stated;
and
– the substance of the following:
• This appliance contains a UV-C emitter;
• Appliances that are obviously damaged must not be operated;
• Unintended use of the appliance or damage to the housing may result in the escape of
dangerous UV-C radiation. UV-C radiation may, even in little doses, cause harm to the
eyes and skin.
The instructions of appliances containing replaceable UV-C emitters shall also contain the
substance of the following:
– Read the maintenance instructions before opening the appliance.
– The appliance must be disconnected from the supply before replacing the UV-C emitter.
The instructions for appliances intended to be used in aquariums, garden ponds and the like,
except for those of class III construction, shall include the substance of the following:
WARNING: Disconnect the appliance from the supply before carrying out maintenance.
If symbols ISO 7000-0790 (2004-01) and IEC 60417-6444 (2020-12) are used, the meaning
shall be explained.
7.12.1 Addition:
The installation instructions shall state that the appliance is to be supplied through a residual
current device (RCD) having a rated residual operating current not exceeding 30 mA.
The installation instruction of class III appliances shall include details regarding the fixing and
location of safety isolating transformers to prevent them from falling into the water or from
being affected by water.
7.15 Addition:
The type reference of replaceable UV-C emitters shall be visible during their replacement.
8 Protection against access to live parts
This clause of Part 1 is applicable.

9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 101 may be used to measure the temperature rises of external accessible
surfaces specified in Table 101. The probe is applied with a force of 4 N ± 1 N to the surface
in such a way that the best possible contact between the probe and the surface is ensured. The
measurement is performed after a contact period of 30 s.
The probe may be held in place using a laboratory stand clamp or similar device. Any measuring
instrument giving the same results as the probe may be used.
11.7 Modification:
Replace the first paragraph with the following:
Appliances are operated until steady conditions are established.
11.8 Modification:
Replace the first paragraph with the following:
During the test, the temperature rises are monitored continuously and shall not exceed the
values shown in Table 3 and Table 101.

– 12 – IEC 60335-2-109:2023 © IEC 2023
Table 101 – Maximum temperature rises
for specified external accessible surfaces under normal operating conditions
a
Surface Temperature rise of external accessible surfaces
K
Surfaces of appliances Surfaces of appliances
situated not more than situated more than 850 mm
850 mm above the floor after above the floor after
installation or in normal use installation or in normal use
Bare metal 38 42
b
Coated metal 42 49
Glass and ceramic 51 56
c, d
Plastic and plastic coating > 0,4 mm 58 62
NOTE The temperature rise limits of handles, knobs, grips, keyboards, keypads and similar parts are specified in
Table 3.
a
Temperature rises are not measured on:
– the underside of appliances intended to be used on a working surface or floor; where these surfaces are
inaccessible to a 75 mm diameter probe having a hemispherical end;
– the rear surface of appliances which, according to the instructions, shall be placed against a wall and where
these surfaces are inaccessible to a 75 mm diameter probe having a hemispherical end.
b
Metal is considered coated when a coating having a minimum thickness of 90 µm made of enamel, powder or
non-substantially plastic coating is used.
c
The temperature rise limit of plastic also applies for plastic material having a metal finish of thickness less than
0,1 mm.
d
When the thickness of the plastic coating does not exceed 0,4 mm, the temperature rise limits of coated metal
for underlying metal apply or the temperature rise limits for glass or ceramic material for underlying glass or

ceramic material apply.
12 Charging of metal-ion batteries
This clause of Part 1 is applicable.
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.1.1 Addition:
IPX8 appliances are tested as described in IEC 60529:1989 including IEC 60529:1989, 14.2.8,
and IEC 60529:1989/AMD1:1999 and IEC 60529:1989/AMD2:2013, the appliance being
immersed for a period of two hours. During the first hour of immersion, the appliance is supplied
at rated voltage; during the second hour of immersion, it is disconnected from the supply.

16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Addition:
UV radiation water treatment appliances are also subjected to the tests of 19.101 and 19.102.
19.13 Addition:
During and after the tests, the appliance shall comply with Clause 32.
19.101 UV radiation water treatment appliances are operated under the conditions of
Clause 11, but without water.
19.102 UV radiation water treatment appliances are operated under the fault conditions
specified in IEC 60598-1:2020, items a), d) and e) of 12.5.1, the appliance being supplied at
rated voltage.
The temperatures of ballast windings shall not exceed the values specified in
IEC 60598-1:2020, 12.5.2 when measured under the conditions specified.
20 Stability and mechanical hazards
This clause of Part 1 is applicable.
21 Mechanical strength
This clause of Part 1 is applicable.
22 Construction
This clause of Part 1 is applicable except as follows.
22.33 Addition:
Water is allowed to be in contact with reinforced insulation of UV radiation water treatment
appliances used in aquariums and having a glass enclosure.

– 14 – IEC 60335-2-109:2023 © IEC 2023
22.40 Addition:
UV radiation water treatment appliances are not considered to be appliances that could give
rise to a hazard if operated continuously, automatically or remotely.
22.47 Addition:
For appliances intended to only be connected to a pressurized water system, other than the
water mains, the test is carried out at 1,5 times the marked rated pressure.
22.49 Not applicable.
22.51 Not applicable.
22.101 Class I UV radiation water treatment appliances having an enclosure of non-metallic
material shall be constructed so that leakage of liquids does not result in a hazard.
Compliance is checked by the following test.
A hole is made in the enclosure in the most unfavourable location.
The appliance is placed in the most unfavourable position that is possible according to the
instructions. Water containing approximately 1 % NaCI is poured into the enclosure at a rate of
approximately 100 ml/min, avoiding live parts. The accumulating water shall come into contact
with earthed metal before reaching live parts.
22.102 In UV radiation water treatment appliances, no UV radiation shall be discharged
from the appliance
– before, during or after installation;
– during operation;
– during maintenance;
– during cleaning;
– during replacement of the UV-C emitter.
This requirement may be met by mechanical construction, or by a switch that de-energizes the
UV-C emitter.
Compliance is checked by inspection and by the tests of Clause 32. It shall not be possible to
operate the switch, if any, with test probe B of IEC 61032 applied with a force of 5 N.
22.103 If the replacement of the UV-C emitter is allowed by the user, the appliance shall be
constructed so that
– the replacement of the UV-C emitter is easily possible;
– the UV-C emitter is correctly sealed after replacement;
– if screws, seals or components are omitted or incorrectly positioned or fastened, the
appliance is rendered inoperable or manifestly incomplete.
Compliance is checked by inspection and, for parts that are removed for the UV-C emitter
replacement, by disassembling and assembling these parts ten times, followed by the tests of
15.1.2 and Clause 32.
22.104 If the replacement of the UV-C emitter by the user is not intended, this shall be
prevented by the construction of the appliance.
Compliance is checked by inspection and, if necessary, by manual test.
22.105 In class II appliances, there shall be no conductive connection between the UV-C
emitter and the supply mains. The insulation between the UV-C emitter and the supply mains
shall be at least reinforced insulation. In addition, the inlet and outlet water points shall be
maintained at the same potential under normal operation and under abnormal operation as
specified in Clause 19.
Compliance is checked by inspection, measurements and appropriate tests.
22.106 Class III appliances immersed in water shall have a rated voltage not exceeding
12 V AC or 30 V DC. However, class III appliances for use in swimming pools shall have a
rated voltage not exceeding 12 V if they are intended to be immersed in the pool water when
persons are in the pool.
Compliance is checked by inspection and measurement.
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable.
25 Supply connection and external flexible cords
This clause of Part 1 is applicable except as follows.
25.5 Addition:
Type X attachment is not allowed for IPX7 or IPX8 appliances.
Type Z attachment is allowed.
25.7 Addition:
The supply cord of appliances intended for outdoor use, other than class III appliances, shall
be polychloroprene sheathed and not be lighter than ordinary polychloroprene sheathed cord
(code designation 60245 IEC 57).
26 Terminals for external conductors
This clause of Part 1 is applicable.
27 Provision for earthing
This clause of Part 1 is applicable except as follows.

– 16 – IEC 60335-2-109:2023 © IEC 2023
27.1 Addition:
Unless the water is insulated from live parts by double insulation, the inlet and outlet pipes
of class I appliances shall
– contain a metal sieve reliably connected to the earthing terminal; or
– be of metal and permanently and reliably connected to the earthing terminal. The other
accessible metal parts of the appliance in contact with the water shall also be permanently
and reliably connected to the earthing terminal.
28 Screws and connections
This clause of Part 1 is applicable.
29 Clearances, creepage distances and solid insulation
This clause of Part 1 is applicable.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.2.2 Not applicable.
31 Resistance to rusting
This clause of Part 1 is applicable.
32 Radiation, toxicity and similar hazards
This clause of Part 1 is applicable except as follows.
32.101 The ozone concentration produced by UV radiation water treatment appliances for
indoor use shall not be excessive.
Compliance is checked by the following test that is carried out in a room without openings
having dimensions of 2,5 m × 3,5 m × 3,0 m, the walls being covered with polyethylene sheet.
The room is maintained at approximately 25 °C and 50 % relative humidity. The UV radiation
water treatment appliance is positioned in accordance with the instructions, supplied at rated
voltage and then operated until steady conditions are reached.
The ozone sampling tube is located 10 mm from the appliance. The background ozone
concentration measured prior to the test is subtracted from the maximum concentration
measured during the test.
-6
The percentage of ozone in the room shall not exceed 5 × 10 .

Key
A adhesive
B thermocouple wires 0,3 mm diameter to IEC 60584-1 Type K
C handle arrangement permitting a contact force of 4 N ± 1 N
D polycarbonate tube: inside diameter 3 mm, outside diameter 5 mm
E tinned copper disc: 5 mm diameter, 0,5 mm thick with flat contact face
Figure 101 – Probe for measuring surface temperatures

– 18 – IEC 60335-2-109:2023 © IEC 2023
Annexes
The annexes of Part 1 are applicable.

Bibliography
The bibliography of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-41, Household and similar electrical appliances – Safety – Part 2-41: Particular
requirements for pumps
IEC 60598-2-11, Luminaires – Part 2-11: Particular requirements – Aquarium luminaires
IEC 60598-2-18, Luminaires – Part 2-18: Particular requirements – Luminaires for swimming
pools and similar applications

___________
– 20 – IEC 60335-2-109:2023 © IEC 2023
SOMMAIRE
AVANT-PROPOS . 21
INTRODUCTION . 24
1 Domaine d'application . 25
2 Références normatives . 25
3 Termes et définitions . 26
4 Exigences générales . 26
5 Conditions générales d'essais . 26
6 Classification . 26
7 Marquage et instructions . 27
8 Protection contre l'accès aux parties actives. 29
9 Démarrage des appareils à moteur . 29
10 Puissance et courant . 29
11 Échauffements. 29
12 Charge des batteries à ions métalliques . 30
13 Courant de fuite et rigidité diélectrique à la température de régime .
...