IEC 60335-2-99:2021

IEC 60335-2-99 ®
Edition 2.1 2025-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
Household and similar electrical appliances – Safety –
Part 2-99: Particular requirements for commercial electric hoods

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IEC 60335-2-99 ®
Edition 2.1 2025-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
Household and similar electrical appliances – Safety –
Part 2-99: Particular requirements for commercial electric hoods
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.040.20 ISBN 978-2-8327-0223-9
REDLINE VERSION – 2 – IEC 60335-2-99:2021+AMD1:2025 CSV
© IEC 2025
CONTENTS
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 General requirement . 9
5 General conditions for the tests . 9
6 Classification . 9
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 . 14
21 Mechanical strength . 14
22 Construction . 14
23 Internal wiring . 15
24 Components . 15
25 Supply connection and external flexible cords . 15
26 Terminals for external conductors . 16
27 Provision for earthing . 16
28 Screws and connections . 16
29 Clearances, creeping distances and solid insulation . 17
30 Resistance to heat and fire . 17
31 Resistance to rusting . 18
32 Radiation, toxicity and similar hazards . 18
Annexes . 19
Annex B (normative) Battery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances .
Annex P (informative) Guidance for the application of this standard to appliances used
in tropical climates . 21
Bibliography . 22

Table 101 – Assembling torques for screwed connections providing earthing continuity . 17

© IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-99: Particular requirements for commercial electric hoods

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 consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 60335-2-99 edition 2.1 contains the second edition (2021-11) [documents
61/6371/FDIS and 61/6421/RVD] and its amendment 1 (2025-02) [documents 61/7238/CDV
and 61/7358/RVC].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red
text. A separate Final version with all changes accepted is available in this publication.

REDLINE VERSION – 4 – IEC 60335-2-99:2021+AMD1:2025 CSV
© IEC 2025
IEC 60335-2-99 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 2003 and
Amendment 1:2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 11.7, 22.102, 22.104, 27.2,
30.101);
c) exclusion of battery-operated appliances and appliances used in areas open to the public
(Clause 1);
d) addition of requirement for appliances incorporating means for ionizing air (32.101);
e) conciliation of the text of IEC 60335-2-99 with other standards under IEC/TC61/MT32.
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 in the IEC 60335 series, published 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 commercial electric hoods.
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.

© IEC 2025
The committee has decided that the contents of this document and its amendment 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, or
• revised.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may 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.
The following differences exist in the countries indicated below.
– 6.1: Class 01 hoods are allowed (Japan).
– 13.2: Leakage current limits are different (Japan).
– 16.2: Leakage current limits are different (Japan).

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© IEC 2025
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.
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 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 for 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.

© IEC 2025
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-99: Particular requirements for commercial electric hoods

1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of electrically operated commercial hoods intended
for installation above commercial cooking appliances such as ranges, griddles, griddle grills
and deep fat fryers, their rated voltage being not more than 250 V for single phase hoods
connected between one phase and neutral, and 480 V for other hoods. Only single complete
units and hoods supplied as separate parts which when assembled form a complete working
hood, incorporating a fan, are within the scope of the standard including direct current (DC)
supplied appliances.
The hood may be used above one or more appliance or types of appliances.
The following extraction systems are within the scope of this standard:
– back-draft ventilation systems;
– down-draft ventilation systems;
– fume extraction modules.
These appliances are not intended for household and similar purposes. They are used in areas
not open to the public, for example in kitchens of restaurants, canteens, hospitals and in
commercial enterprises such as bakeries and butcheries.
As far as is practicable, this standard deals with the common hazards presented by these types
of appliances.
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 including ventilation 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:
– domestic range hoods (IEC 60335-2-31);
– purpose-built hoods, although this standard can be used as a guide (a purpose-built hood
is either constructed on-site or specially constructed in the factory and is not mass
produced);
– appliances not incorporating a fan;
– appliances designed exclusively for industrial purposes;
– 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);.
– battery-operated appliances.

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2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-65:2002, Household and similar electrical appliances – Safety – Part 2-65:
Particular requirements for air-cleaning appliances
IEC 60335-2-65:2002/AMD1:2008
IEC 60335-2-65:2002/AMD2:2015
ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel – Part 1:
Bolts, screws and studs with specified property classes – Coarse thread and fine pitch thread
ISO 3506-1, Fasteners – Mechanical properties of corrosion-resistant stainless steel fasteners
– Part 1: Bolts, screws and studs with specified grades and property classes
ISO 3506-2, Fasteners – Mechanical properties of corrosion-resistant stainless steel fasteners
– Part 2: Nuts with specified grades and property classes
ISO 3506-3, Mechanical properties of corrosion-resistant stainless steel fasteners – Part 3: Set
screws and similar fasteners not under tensile stress
ISO 3506-4, Mechanical properties of corrosion-resistant stainless steel fasteners – Part 4:
Tapping screws
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.4 Addition:
Note 101 to entry The rated power input is the sum of the power inputs of all the individual elements in the
appliance that can be on at one time; where several of such combinations are possible, the one giving the highest
power input is used in determining the rated power input.
3.1.9 Replacement:
normal operation
Modification:
Replace the first paragraph with the following:
operation of the appliance under the following conditions:
The appliance is operated after installation in accordance with the instructions, except that it is
not connected to a duct.
Appliances intended to be used in combination with other appliances are tested in combination
with the other appliances in operation. Appliances that are not interlocked with other appliances
are also tested with the other appliances in operation and the fan switched off.
___________
There exists a consolidated edition 2.2:2015 that includes edition 2 and its Amendment 1 and Amendment 2.

© IEC 2025
3.5 Definitions relating to types of appliances
3.5.101
hood
motor-operated appliance intended to collect and remove contaminated air from catering
appliances
Note 1 to entry: The contaminated air may pass through filter systems and be discharged back into the room or
removed from the room.
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Appliances shall be class I with respect to protection against electric shock.
Compliance is checked by inspection and by the relevant tests.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances shall be marked on or near the lampholder with the maximum power input of
replaceable illumination lamps as follows:
lamp max. W
The word "lamp" may be replaced by symbol IEC 60417-5012 (2002-10).
7.12 Addition:
The instructions for use shall state the substance of the following:
– there shall be adequate air intake into the room when the appliance is used at the same
time with appliances burning gas or other fuels;
– that filters must be cleaned regularly;
– there is a fire risk if cleaning is not carried out in accordance with the instructions;
– do not flambé under the appliance.
Instructions for user maintenance, for example the method and frequency of cleaning, shall
also be given. They shall include a statement that the appliance is not to be cleaned with a
water jet or a steam cleaner.
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© IEC 2025
The instructions shall include the substance of the following:
These appliances are intended to be used for commercial applications, for example in
kitchens of restaurants, canteens, hospitals and in commercial enterprises such as bakeries,
butcheries, etc., but not for continuous mass production of food.
If the manufacturer wants to limit the use of the appliance to less than the above, this has to be
clearly stated in the instructions.
Modification:
The instruction concerning persons (including children) with reduced physical, sensory or
mental capabilities or lack of experience and knowledge and children playing with the appliance
is not applicable.
7.12.1 Replacement:
The appliance shall be accompanied by instructions detailing any special precautions necessary
for installation. The instructions for installation shall state:
– the minimum distance between the appliance and the lowest part of the appliance;
– that regulations concerning the air intake and discharge of exhaust air have to be fulfilled;
– that ventilation requirements specified for the cooking equipment shall be observed;
– that special consideration is needed when there are other open flued appliances in the same
room to prevent back-suction of flue gasses;
– that if the appliance is used above a gas appliance, a non-self-resetting device that turns
off the gas supply to the appliance if the appliance stops operating must be installed in
accordance with national gas regulations;
– that the installation of the appliance must not infringe gas regulations.
Compliance is checked by inspection.
7.12.9 Not applicable.
7.15 Addition:
The marking for maximum rated wattage of a replaceable illumination lamp shall be visible
during replacement of the lamp.
7.101 Equipotential bonding terminals shall be marked with symbol IEC 60417-1-5021
(2002-10).
The marking shall not be placed on screws, removable washers or other parts which can be
removed when conductors are being connected.
Compliance is checked by inspection.
8 Protection against access to live parts
This clause of Part 1 is applicable.

© IEC 2025
9 Starting of motor-operated appliances
This clause of Part 1 is applicable except as follows.
9.101 Fan motors providing a cooling effect in order to comply with the requirements of
Clause 11 shall start under all voltage conditions which can occur in use.
Compliance is checked by the following tests using a supply source such that its drop in voltage
does not exceed 1 % during the tests, the appliance being returned to room temperature after
each test.
The appliance is started under the conditions occurring at the beginning of normal operation
or, for automatic appliances, at the beginning of the normal cycle of operation, a voltage equal
to 0,85 times rated voltage being applied to the input terminals of the appliance. For appliances
provided with motors having other than centrifugal starting switches, this test is repeated at a
voltage equal to 1,06 times rated voltage being applied to the input terminals of the appliance.
The test is carried out three times.
In all cases, the motor shall start and it shall function in such a way that safety is not affected,
and the overload protective devices of the motor shall not operate.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.2 Replacement:
Appliances intended to be placed above a hob are installed so that the distance between their
lowest point and the hob surface is the minimum distance specified in the instructions for
installation. The hob selected for the test shall have uniformly arranged gas burners with a total
heat input equal to 30 kW/m of the gross area (width times depth) of the appliance. Vessels
containing water are placed without lids on the gas burners, which are operated to maintain
boiling. The diameters or sizes of the vessels are approximately equal to that of the cooking
zones.
Other appliances are installed according to the manufacturer’s instructions.
Appliances are placed in a test corner as follows:
– appliances normally fixed to a wall are fixed to one of the walls, as near to the other wall
and floor or ceiling as is likely to occur, taking into account the instructions;
– appliances normally fixed to a ceiling are fixed to the ceiling as near to the walls as is likely
to occur, taking into account the instructions;
– other appliances are placed as near to the walls as possible.
Dull black-painted plywood approximately 20 mm thick is used for the test corner.
Appliances intended to be used in combination with other appliances are placed as required for
the other appliances.
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11.7 Replacement:
Modification:
Replace the first paragraph with the following:
Appliances are operated until steady conditions are established.
The duration of the test may consist of more than one cycle of operation.
11.8 Modification:
The temperature rise limit for external enclosures is not applicable.
12 Charging of metal-ion batteries
This clause of Part 1 is not applicable.
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.2 Modification:
Instead of the permissible leakage current for stationary class I appliances, the following
applies:
– for cord and plug connected 0,75 mA or 1 mA per kW rated power input of the
appliances appliance with a maximum of 10 mA, whichever is higher;
– for other appliances 0,75 mA or 1 mA per kW rated power input of the
appliance with no maximum, whichever is higher.

For portable class I appliances, instead of the permissible leakage current, the following
applies:
– for cord and plug connected 0,75 mA or 1 mA per kW rated power input of the
appliances appliance with a maximum of 10 mA, whichever is higher.

14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable.

© IEC 2025
16 Leakage current and electric strength
This clause of Part 1 is applicable except as follows.
16.2 Modification:
Instead of the permissible leakage current for stationary class I appliances, the following
applies:
– for cord and plug connected 0,75 mA or 1 mA per kW rated power input of the
appliances appliance with a maximum of 10 mA, whichever is higher;
– for other appliances 0,75 mA or 1 mA per kW rated power input of the
appliance with no maximum, whichever is higher.

For portable class I appliances, instead of the permissible leakage current, the following
applies:
– for cord and plug connected 0,75 mA or 1 mA per kW rated power input of the
appliances appliance with a maximum of 10 mA, whichever is higher.

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:
Compliance is also checked by the test of 19.101.
19.13 Addition:
During the test of 19.101, the temperature of the motor windings shall not exceed the values
shown in Table 8 of 19.7.
The appliance shall not deform to such an extent that parts fall from it.
19.101 Appliances intended to be placed above a hob are operated as specified in 11.2, but
without vessels and with all gas burners switched on.

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© IEC 2025
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.1 Addition:
Portable appliances provided with wheels are placed in the most unfavourable position against
an edge with a height equal to the radius of the wheels plus 10 mm. If the wheels differ in size,
that edge height that is the most unfavourable is chosen.
A force equal to 8 % of the mass of the fully equipped appliance is applied horizontally to the
middle of the top edge of the appliance but not higher than 900 mm, in the most unfavourable
direction.
The appliance shall not tilt.
Modification:
The test with the angle of inclination increased to 15° is not carried out.
20.2 Addition:
Filters are considered to be detachable parts.
21 Mechanical strength
This clause of Part 1 is applicable.
22 Construction
This clause of Part 1 is applicable except as follows.
22.8 Replacement:
For appliances having compartments to which access is gained during user maintenance, the
electrical connections shall be arranged so that they are not subjected to pulling during cleaning
or other user maintenance.
Compliance is checked by inspection and by manual test.
Detachable parts are removed. It shall not be possible to grasp wiring in such a way that the
connections are subjected to undue stress.
In case of doubt, the wiring is subjected to a pull of 10 N, applied without jerks three times in
succession, in the most unfavourable direction likely to occur during user maintenance. There
shall be no appreciable displacement of the connections.
22.101 Appliances shall be protected in such a manner that moisture and grease will not
collect in such a way as to affect creepage distance and clearance values. Electrical insulation
for which creepage distances and clearances are specified shall not be located in air ducts.
Compliance is checked by inspection.

© IEC 2025
22.102 For multi-phase appliances, thermal cut-outs protecting motors the unexpected
starting of which can cause a hazard shall be of the non-self-resetting and trip-free type, and
shall provide all-pole disconnection from related supply circuits.
For single-phase appliances, thermal cut-outs protecting motors the unexpected starting of
which can cause a hazard shall be of the non-self-resetting and trip-free type, and shall provide
at least one-pole disconnection.
If the non-self-resetting thermal cut-out is only accessible after removing parts with the aid
of a tool, the trip-free type is not required.
NOTE Trip-free is an automatic action that is independent of manipulation or position of the actuating member.
Compliance is checked by inspection and by manual test.
22.103 Lights, switches or push-buttons for the indication of danger, alarm or similar situations
shall be coloured red.
Compliance is checked by inspection.
22.104 Appliances shall be constructed so that they can be fixed securely to a wall or other
support. Key-hole slots, hooks and similar means, without any further means to prevent the
appliance from being inadvertently lifted off the wall or other support shall not be used. Brackets
and similar means shall be of metal which shall not be liable to creep or deform.
Compliance is checked by inspection.
22.105 Appliances shall be constructed so that parts liable to accumulate deposits of grease,
including parts located behind a filter, can be cleaned.
Compliance is checked by inspection.
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.
25.3 Addition:
Appliances with a mass greater than 40 kg, intended for permanent connection to fixed wiring
and not provided with rollers, castors or similar means shall be constructed so that the
connection can be done after the appliance has been installed in accordance with the
manufacturer’s instructions.
The connection to the fixed wiring of built-in appliances may be made before the appliance is
installed.
REDLINE VERSION – 16 – IEC 60335-2-99:2021+AMD1:2025 CSV
© IEC 2025
Terminals for permanent connection of cables to fixed wiring may also be suitable for the type
X attachment of a supply cord. In this case, a cord anchorage complying with 25.16 shall be
fitted to the appliance.
25.7 Modification:
Instead of the types of supply cords specified, the following applies:
Supply cords shall be oil-resistant, sheathed flexible cable not lighter than ordinary
polychloroprene or other equivalent synthetic elastomer 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.
27.1 Addition:
Metal parts which become accessible during user maintenance are considered to be
accessible parts.
27.2 Addition:
Appliances shall be provided with a terminal for the connection of an external equipotential
conductor. This terminal shall
– be in effective electrical contact with all fixed exposed metal parts of the appliance, except
small fixed exposed metal parts such as nameplates and similar parts;
– allow the connection of a conductor having a nominal cross-sectional area of 2,5 mm to
6 mm ; and
– be located in a position convenient for the connection of the bonding conductor after
installation of the appliance.
28 Screws and connections
This clause of Part 1 is applicable except as follows.
28.1 Addition:
Screws made of carbon steel and alloy steel shall be made in accordance with ISO 898-1.
Screws made of corrosion-resistant stainless-steel shall be made in accordance with
ISO 3506-1, or ISO 3506-2, or ISO 3506-3, or ISO 3506-4.
28.4 Addition:
Screws that make mechanical connections and electrical connections shall be so designed that
the contact pressure does not change appreciably through loosening of the screwed assembly
parts during operational stress and contact corrosion.

© IEC 2025
Screws that make mechanical connections and provide earthing continuity shall be so designed
that the contact pressure does not change appreciably through loosening of the screwed
assembly parts due to operational stress and contact corrosion. They shall be designed so that
a minimum contact pressure remains.
Compliance is checked by inspection and by measuring the assembling torques for screwed
connections providing earthing continuity by applying a torque as specified in Table 101 to turn
the screw in the fastening direction. The screw shall not turn.
The screw shall not have been unfastened prior to performing this test.
Table 101 – Assembling torques for screwed connections providing earthing continuity
Assembling torque
Nm
Outer thread
diameter of
Screwed connections for the mechanical Screwed connections for the mechanical
the screw
strength of the screws A2-70 according to strength of the screws > 8.8 according to
ISO 3506-1, or ISO 3506-2, or ISO 3506-3, ISO 898-1
mm
or ISO 3506-4 and 5.8 according to
ISO 898-1
> 2,8 and ≤ 3,6 0,8 1,3
> 3,6 and ≤ 4,2 1,9 3,0
> 4,2 and ≤ 5,3 3,7 6,0
> 5,3 and ≤ 6,3 6,5 10,0
M 8 15,0 25,0
M 10 31,0 50,0
29 Clearances, creeping distances and solid insulation
This clause of Part 1 is applicable except as follows.
29.2 Addition:
The microenvironment is pollution degree 3 and the insulation shall have a comparative tracking
index (CTI) not less than 250, unless the insulation is enclosed or located so that it is unlikely
to be exposed to pollution during normal use of the appliance.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.1 Addition:
The ball pressure test is carried out on the exposed parts of the appliance at a temperature of
at least 105 °C ± 2 °C.
30.2.1 Modification:
The glow-wire test is carried out at 650 °C. The glow-wire flammability index (GWFI) according
to IEC 60695-2-12 shall be at least 650 °C.
30.2.2 Not applicable.
REDLINE VERSION – 18 – IEC 60335-2-99:2021+AMD1:2025 CSV
© IEC 2025
30.101 Appliances shall not incorporate combustible material liable to extend a fire originating
from a cooking surface.
Compliance is checked as follows.
Filters of non-metallic material or metallic filters coated with non-metallic material intended for
the absorption of fumes and/or grease are subjected to the burning test specified in ISO 9772
for category HBF material, if relevant, or shall be classified at least HB40 according to
IEC 60695-11-10, except that the thickness of the specimen is that of the filter. For the burning
test specified in ISO 9772, it may be necessary to support the specimen.
External parts having a total mass not exceeding 0,25 kg are subjected to the glow-wire test at
a temperature of 650 °C.
Other accessible parts of the enclosure are subjected to the needle-flame test of normative
Annex E.
Internal air-ducts and parts within them such as fans, are subjected to the needle-flame test of
normative Annex E, droplets of material being ignored.
Grease filters are not subjected to the test of normative Annex E.
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 For appliances incorporating a filter system with means for ionizing the air
...

IEC 60335-2-99 ®
Edition 2.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-99: Particular requirements for commercial electric hoods

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-99: Exigences particulières pour les hottes de cuisine électriques
à usage commercial
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IEC 60335-2-99 ®
Edition 2.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-99: Particular requirements for commercial electric hoods

Appareils électrodomestiques et analogues – Sécurité –

Partie 2-99: Exigences particulières pour les hottes de cuisine électriques

à usage commercial
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.040.20 ISBN 978-2-8322-1045-5

– 2 – IEC 60335-2-99:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 General requirement . 9
5 General conditions for the tests . 9
6 Classification . 9
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 . 14
21 Mechanical strength . 14
22 Construction . 14
23 Internal wiring . 15
24 Components . 15
25 Supply connection and external flexible cords . 15
26 Terminals for external conductors . 16
27 Provision for earthing . 16
28 Screws and connections . 16
29 Clearances, creeping distances and solid insulation . 17
30 Resistance to heat and fire . 17
31 Resistance to rusting . 18
32 Radiation, toxicity and similar hazards . 18
Annexes . 19
Annex B (normative)  Battery-operated appliances, separable batteries and
detachable batteries for battery-operated appliances . 20
Annex P (informative) Guidance for the application of this standard to appliances used
in tropical climates . 21
Bibliography . 22

Table 101 – Assembling torques for screwed connections providing earthing continuity . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-99: Particular requirements for commercial electric hoods

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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60335-2-99 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 2003 and
Amendment 1:2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 11.7, 22.102, 22.104, 27.2,
30.101);
c) exclusion of battery-operated appliances and appliances used in areas open to the public
(Clause 1);
d) addition of requirement for appliances incorporating means for ionizing air (32.101);
e) conciliation of the text of IEC 60335-2-99 with other standards under IEC/TC61/MT32.

– 4 – IEC 60335-2-99:2021 © IEC 2021
The text of this International Standard is based on the following documents:
Draft Report on voting
61/6371/FDIS 61/6421/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 in the IEC 60335 series, published 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 commercial electric hoods.
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 may 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.
The following differences exist in the countries indicated below.
– 6.1: Class 01 hoods are allowed (Japan).
– 13.2: Leakage current limits are different (Japan).
– 16.2: Leakage current limits are different (Japan).

– 6 – IEC 60335-2-99:2021 © IEC 2021
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.
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 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 for 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 2-99: Particular requirements for commercial electric hoods

1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of electrically operated commercial hoods intended
for installation above commercial cooking appliances such as ranges, griddles, griddle grills
and deep fat fryers, their rated voltage being not more than 250 V for single phase hoods
connected between one phase and neutral, and 480 V for other hoods. Only single complete
units and hoods supplied as separate parts which when assembled form a complete working
hood, incorporating a fan, are within the scope of the standard.
The hood may be used above one or more appliance or types of appliances.
The following extraction systems are within the scope of this standard:
– back-draft ventilation systems;
– down-draft ventilation systems;
– fume extraction modules.
These appliances are not intended for household and similar purposes. They are used in areas
not open to the public, for example in kitchens of restaurants, canteens, hospitals and in
commercial enterprises such as bakeries and butcheries.
As far as is practicable, this standard deals with the common hazards presented by these types
of appliances.
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 including ventilation 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:
– domestic range hoods (IEC 60335-2-31);
– purpose-built hoods, although this standard can be used as a guide (a purpose-built hood
is either constructed on-site or specially constructed in the factory and is not mass
produced);
– appliances not incorporating a fan;
– appliances designed exclusively for industrial purposes;
– 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);
– battery-operated appliances.

– 8 – IEC 60335-2-99:2021 © IEC 2021
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-65:2002, Household and similar electrical appliances – Safety – Part 2-65:
Particular requirements for air-cleaning appliances
IEC 60335-2-65:2002/AMD1:2008
IEC 60335-2-65:2002/AMD2:2015
ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel – Part 1:
Bolts, screws and studs with specified property classes – Coarse thread and fine pitch thread
ISO 3506-1, Fasteners – Mechanical properties of corrosion-resistant stainless steel fasteners
– Part 1: Bolts, screws and studs with specified grades and property classes
ISO 3506-2, Fasteners – Mechanical properties of corrosion-resistant stainless steel fasteners
– Part 2: Nuts with specified grades and property classes
ISO 3506-3, Mechanical properties of corrosion-resistant stainless steel fasteners – Part 3: Set
screws and similar fasteners not under tensile stress
ISO 3506-4, Mechanical properties of corrosion-resistant stainless steel fasteners – Part 4:
Tapping screws
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.4 Addition:
Note 101 to entry The rated power input is the sum of the power inputs of all the individual elements in the
appliance that can be on at one time; where several of such combinations are possible, the one giving the highest
power input is used in determining the rated power input.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions:
The appliance is operated after installation in accordance with the instructions, except that it is
not connected to a duct.
Appliances intended to be used in combination with other appliances are tested in combination
with the other appliances in operation. Appliances that are not interlocked with other appliances
are also tested with the other appliances in operation and the fan switched off.
___________
There exists a consolidated edition 2.2:2015 that includes edition 2 and its Amendment 1 and Amendment 2.

3.5 Definitions relating to types of appliances
3.5.101
hood
motor-operated appliance intended to collect and remove contaminated air from catering
appliances
Note 1 to entry: The contaminated air may pass through filter systems and be discharged back into the room or
removed from the room.
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Appliances shall be class I with respect to protection against electric shock.
Compliance is checked by inspection and by the relevant tests.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances shall be marked on or near the lampholder with the maximum power input of
replaceable illumination lamps as follows:
lamp max. W
The word "lamp" may be replaced by symbol IEC 60417-5012 (2002-10).
7.12 Addition:
The instructions for use shall state the substance of the following:
– there shall be adequate air intake into the room when the appliance is used at the same
time with appliances burning gas or other fuels;
– that filters must be cleaned regularly;
– there is a fire risk if cleaning is not carried out in accordance with the instructions;
– do not flambé under the appliance.
Instructions for user maintenance, for example the method and frequency of cleaning, shall
also be given. They shall include a statement that the appliance is not to be cleaned with a
water jet or a steam cleaner.
– 10 – IEC 60335-2-99:2021 © IEC 2021
The instructions shall include the substance of the following:
These appliances are intended to be used for commercial applications, for example in
kitchens of restaurants, canteens, hospitals and in commercial enterprises such as bakeries,
butcheries, etc., but not for continuous mass production of food.
If the manufacturer wants to limit the use of the appliance to less than the above, this has to be
clearly stated in the instructions.
Modification:
The instruction concerning persons (including children) with reduced physical, sensory or
mental capabilities or lack of experience and knowledge and children playing with the appliance
is not applicable.
7.12.1 Replacement:
The appliance shall be accompanied by instructions detailing any special precautions necessary
for installation. The instructions for installation shall state:
– the minimum distance between the appliance and the lowest part of the appliance;
– that regulations concerning the air intake and discharge of exhaust air have to be fulfilled;
– that ventilation requirements specified for the cooking equipment shall be observed;
– that special consideration is needed when there are other open flued appliances in the same
room to prevent back-suction of flue gasses;
– that if the appliance is used above a gas appliance, a non-self-resetting device that turns
off the gas supply to the appliance if the appliance stops operating must be installed in
accordance with national gas regulations;
– that the installation of the appliance must not infringe gas regulations.
Compliance is checked by inspection.
7.12.9 Not applicable.
7.15 Addition:
The marking for maximum rated wattage of a replaceable illumination lamp shall be visible
during replacement of the lamp.
7.101 Equipotential bonding terminals shall be marked with symbol IEC 60417-1-5021
(2002-10).
The marking shall not be placed on screws, removable washers or other parts which can be
removed when conductors are being connected.
Compliance is checked by inspection.
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 applicable except as follows.
9.101 Fan motors providing a cooling effect in order to comply with the requirements of
Clause 11 shall start under all voltage conditions which can occur in use.
Compliance is checked by the following tests using a supply source such that its drop in voltage
does not exceed 1 % during the tests, the appliance being returned to room temperature after
each test.
The appliance is started under the conditions occurring at the beginning of normal operation
or, for automatic appliances, at the beginning of the normal cycle of operation, a voltage equal
to 0,85 times rated voltage being applied to the input terminals of the appliance. For appliances
provided with motors having other than centrifugal starting switches, this test is repeated at a
voltage equal to 1,06 times rated voltage being applied to the input terminals of the appliance.
The test is carried out three times.
In all cases, the motor shall start and it shall function in such a way that safety is not affected,
and the overload protective devices of the motor shall not operate.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.2 Replacement:
Appliances intended to be placed above a hob are installed so that the distance between their
lowest point and the hob surface is the minimum distance specified in the instructions for
installation. The hob selected for the test shall have uniformly arranged gas burners with a total
heat input equal to 30 kW/m of the gross area (width times depth) of the appliance. Vessels
containing water are placed without lids on the gas burners, which are operated to maintain
boiling. The diameters or sizes of the vessels are approximately equal to that of the cooking
zones.
Other appliances are installed according to the manufacturer’s instructions.
Appliances are placed in a test corner as follows:
– appliances normally fixed to a wall are fixed to one of the walls, as near to the other wall
and floor or ceiling as is likely to occur, taking into account the instructions;
– appliances normally fixed to a ceiling are fixed to the ceiling as near to the walls as is likely
to occur, taking into account the instructions;
– other appliances are placed as near to the walls as possible.
Dull black-painted plywood approximately 20 mm thick is used for the test corner.
Appliances intended to be used in combination with other appliances are placed as required for
the other appliances.
– 12 – IEC 60335-2-99:2021 © IEC 2021
11.7 Replacement:
Appliances are operated until steady conditions are established.
The duration of the test may consist of more than one cycle of operation.
11.8 Modification:
The temperature rise limit for external enclosures is not applicable.
12 Charging of metal-ion batteries
This clause of Part 1 is not applicable.
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.2 Modification:
Instead of the permissible leakage current for stationary class I appliances, the following
applies:
– for cord and plug connected 0,75 mA or 1 mA per kW rated power input of the
appliances appliance with a maximum of 10 mA, whichever is higher;
– for other appliances 0,75 mA or 1 mA per kW rated power input of the
appliance with no maximum, whichever is higher.

For portable class I appliances, instead of the permissible leakage current, the following
applies:
– for cord and plug connected 0,75 mA or 1 mA per kW rated power input of the
appliances appliance with a maximum of 10 mA, whichever is higher.

14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable.

16 Leakage current and electric strength
This clause of Part 1 is applicable except as follows.
16.2 Modification:
Instead of the permissible leakage current for stationary class I appliances, the following
applies:
– for cord and plug connected 0,75 mA or 1 mA per kW rated power input of the
appliances appliance with a maximum of 10 mA, whichever is higher;
– for other appliances 0,75 mA or 1 mA per kW rated power input of the
appliance with no maximum, whichever is higher.

For portable class I appliances, instead of the permissible leakage current, the following
applies:
– for cord and plug connected 0,75 mA or 1 mA per kW rated power input of the
appliances appliance with a maximum of 10 mA, whichever is higher.

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:
Compliance is also checked by the test of 19.101.
19.13 Addition:
During the test of 19.101, the temperature of the motor windings shall not exceed the values
shown in Table 8 of 19.7.
The appliance shall not deform to such an extent that parts fall from it.
19.101 Appliances intended to be placed above a hob are operated as specified in 11.2, but
without vessels and with all gas burners switched on.

– 14 – IEC 60335-2-99:2021 © IEC 2021
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.1 Addition:
Portable appliances provided with wheels are placed in the most unfavourable position against
an edge with a height equal to the radius of the wheels plus 10 mm. If the wheels differ in size,
that edge height that is the most unfavourable is chosen.
A force equal to 8 % of the mass of the fully equipped appliance is applied horizontally to the
middle of the top edge of the appliance but not higher than 900 mm, in the most unfavourable
direction.
The appliance shall not tilt.
Modification:
The test with the angle of inclination increased to 15° is not carried out.
20.2 Addition:
Filters are considered to be detachable parts.
21 Mechanical strength
This clause of Part 1 is applicable.
22 Construction
This clause of Part 1 is applicable except as follows.
22.8 Replacement:
For appliances having compartments to which access is gained during user maintenance, the
electrical connections shall be arranged so that they are not subjected to pulling during cleaning
or other user maintenance.
Compliance is checked by inspection and by manual test.
Detachable parts are removed. It shall not be possible to grasp wiring in such a way that the
connections are subjected to undue stress.
In case of doubt, the wiring is subjected to a pull of 10 N, applied without jerks three times in
succession, in the most unfavourable direction likely to occur during user maintenance. There
shall be no appreciable displacement of the connections.
22.101 Appliances shall be protected in such a manner that moisture and grease will not
collect in such a way as to affect creepage distance and clearance values. Electrical insulation
for which creepage distances and clearances are specified shall not be located in air ducts.
Compliance is checked by inspection.

22.102 For multi-phase appliances, thermal cut-outs protecting motors the unexpected
starting of which can cause a hazard shall be of the non-self-resetting and trip-free type, and
shall provide all-pole disconnection from related supply circuits.
For single-phase appliances, thermal cut-outs protecting motors the unexpected starting of
which can cause a hazard shall be of the non-self-resetting and trip-free type, and shall provide
at least one-pole disconnection.
If the non-self-resetting thermal cut-out is only accessible after removing parts with the aid
of a tool, the trip-free type is not required.
NOTE Trip-free is an automatic action that is independent of manipulation or position of the actuating member.
Compliance is checked by inspection and by manual test.
22.103 Lights, switches or push-buttons for the indication of danger, alarm or similar situations
shall be coloured red.
Compliance is checked by inspection.
22.104 Appliances shall be constructed so that they can be fixed securely to a wall or other
support. Key-hole slots, hooks and similar means, without any further means to prevent the
appliance from being inadvertently lifted off the wall or other support shall not be used. Brackets
and similar means shall be of metal which shall not be liable to creep or deform.
Compliance is checked by inspection.
22.105 Appliances shall be constructed so that parts liable to accumulate deposits of grease,
including parts located behind a filter, can be cleaned.
Compliance is checked by inspection.
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.
25.3 Addition:
Appliances with a mass greater than 40 kg, intended for permanent connection to fixed wiring
and not provided with rollers, castors or similar means shall be constructed so that the
connection can be done after the appliance has been installed in accordance with the
manufacturer’s instructions.
The connection to the fixed wiring of built-in appliances may be made before the appliance is
installed.
– 16 – IEC 60335-2-99:2021 © IEC 2021
Terminals for permanent connection of cables to fixed wiring may also be suitable for the type
X attachment of a supply cord. In this case, a cord anchorage complying with 25.16 shall be
fitted to the appliance.
25.7 Modification:
Instead of the types of supply cords specified, the following applies:
Supply cords shall be oil-resistant, sheathed flexible cable not lighter than ordinary
polychloroprene or other equivalent synthetic elastomer 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.
27.1 Addition:
Metal parts which become accessible during user maintenance are considered to be
accessible parts.
27.2 Addition:
Appliances shall be provided with a terminal for the connection of an external equipotential
conductor. This terminal shall
– be in effective electrical contact with all fixed exposed metal parts of the appliance, except
small fixed exposed metal parts such as nameplates and similar parts;
– allow the connection of a conductor having a nominal cross-sectional area of 2,5 mm to
6 mm ; and
– be located in a position convenient for the connection of the bonding conductor after
installation of the appliance.
28 Screws and connections
This clause of Part 1 is applicable except as follows.
28.1 Addition:
Screws made of carbon steel and alloy steel shall be made in accordance with ISO 898-1.
Screws made of corrosion-resistant stainless-steel shall be made in accordance with
ISO 3506-1, or ISO 3506-2, or ISO 3506-3, or ISO 3506-4.
28.4 Addition:
Screws that make mechanical connections and electrical connections shall be so designed that
the contact pressure does not change appreciably through loosening of the screwed assembly
parts during operational stress and contact corrosion.

Screws that make mechanical connections and provide earthing continuity shall be so designed
that the contact pressure does not change appreciably through loosening of the screwed
assembly parts due to operational stress and contact corrosion. They shall be designed so that
a minimum contact pressure remains.
Compliance is checked by inspection and by measuring the assembling torques for screwed
connections providing earthing continuity by applying a torque as specified in Table 101 to turn
the screw in the fastening direction. The screw shall not turn.
The screw shall not have been unfastened prior to performing this test.
Table 101 – Assembling torques for screwed connections providing earthing continuity
Assembling torque
Nm
Outer thread
diameter of
Screwed connections for the mechanical Screwed connections for the mechanical
the screw
strength of the screws A2-70 according to strength of the screws > 8.8 according to
ISO 3506-1, or ISO 3506-2, or ISO 3506-3, ISO 898-1
mm
or ISO 3506-4 and 5.8 according to
ISO 898-1
> 2,8 and ≤ 3,6 0,8 1,3
> 3,6 and ≤ 4,2 1,9 3,0
> 4,2 and ≤ 5,3 3,7 6,0
> 5,3 and ≤ 6,3 6,5 10,0
M 8 15,0 25,0
M 10 31,0 50,0
29 Clearances, creeping distances and solid insulation
This clause of Part 1 is applicable except as follows.
29.2 Addition:
The microenvironment is pollution degree 3 and the insulation shall have a comparative tracking
index (CTI) not less than 250, unless the insulation is enclosed or located so that it is unlikely
to be exposed to pollution during normal use of the appliance.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.1 Addition:
The ball pressure test is carried out on the exposed parts of the appliance at a temperature of
at least 105 °C ± 2 °C.
30.2.1 Modification:
The glow-wire test is carried out at 650 °C. The glow-wire flammability index (GWFI) according
to IEC 60695-2-12 shall be at least 650 °C.
30.2.2 N
...