IEC 60335-2-79:2002

INTERNATIONAL IEC
STANDARD 60335-2-79
Edition 2.1
2005-01
Edition 2:2002 consolidated with amendment 1:2004
Household and similar electrical appliances –
Safety –
Part 2-79:
Particular requirements for high pressure cleaners
and steam cleaners
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

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edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD 60335-2-79
Edition 2.1
2005-01
Edition 2:2002 consolidated with amendment 1:2004
Household and similar electrical appliances –
Safety –
Part 2-79:
Particular requirements for high pressure cleaners
and steam cleaners
 IEC 2005  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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Commission Electrotechnique Internationale
International Electrotechnical Commission
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For price, see current catalogue

– 2 – 60335-2-79  IEC:2002+A1:2004(E)

CONTENTS
FOREWORD.3

INTRODUCTION.5

1 Scope .6

2 Normative references .7

3 Definitions .7

4 General requirement.9

5 General conditions for the tests .9
6 Classification.9
7 Marking and instructions.10
8 Protection against access to live parts .13
9 Starting of motor-operated appliances.14
10 Power input and current.14
11 Heating .14
12 Void .15
13 Leakage current and electric strength at operating temperature .15
14 Transient overvoltages .15
15 Moisture resistance .15
16 Leakage current and electric strength .17
17 Overload protection of transformers and associated circuits .17
18 Endurance.17
19 Abnormal operation .18
20 Stability and mechanical hazards .20
21 Mechanical strength .21
22 Construction.22
23 Internal wiring.25
24 Components .25
25 Supply connection and external flexible cords .26
26 Terminals for external conductors .27
27 Provision for earthing.27
28 Screws and connections .27
29 Clearances, creepage distances and solid insulation .27
30 Resistance to heat and fire .27

31 Resistance to rusting .27
32 Radiation, toxicity and similar hazards .27
Annexes .31
Bibliography .31
Figure 101– Warning symbol.28
Figure 102 – Impact test apparatus .29
Figure 103 – Reactions on handle .30

60335-2-79 © IEC:2002+A1:2004(E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-79: Particular requirements for

high pressure cleaners and steam cleaners

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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.
This part of International Standard IEC 60335 has been prepared by sub-committee 61J:
Electrical motor-operated cleaning appliances for industrial use, of IEC technical committee 61:
Safety of household and similar electrical appliances.
This consolidated version of IEC 60335-2-79 consists of the second edition (2002)
[documents 61J/128/FDIS and 61J/133/RVD] and its amendment 1 (2004) [documents
61J/165/FDIS and 61J/171/RVD].
The technical content is therefore identical to the base edition and its amendment and has
been prepared for user convenience.
It bears the edition number 2.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
– 4 – 60335-2-79  IEC:2002+A1:2004(E)

This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) 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: Safety requirements for electric high pressure
cleaners and steam cleaners.
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 the base publication and its amendments will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The following differences exist in the countries indicated below.
– Clause 1: Different pressure limitations apply (USA).
– 6.1: Ground fault current interrupters are required for appliances rated 250 V or less, single phase (USA).
– 7.12: No requirements for sound and vibration markings exist (USA).
– 11.101: The losses of burners are subject to regulations (Germany). Smoke spot requirements are different

(USA).
– 20.103: The fuel tank capacity is limited (USA).
– 21.101, 21.101.2 and 21.102: Different burner tests are required (USA).
– 25.7: Different power supply cord lengths are required (Canada, USA).
– Clause 32: The connection with the water mains is subject to regulations (Canada).
A bilingual version of this publication may be issued at a later date.

60335-2-79  IEC:2002+A1:2004(E) – 5 –

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.

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.
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.
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.
– 6 – 60335-2-79  IEC:2002+A1:2004(E)

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-79: Particular requirements for

high pressure cleaners and steam cleaners

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of high pressure cleaners for household,
industrial and commercial use having a pressure not less than 2,5 MPa and not more than
25 MPa and with an input to the drive for the high pressure pump not exceeding 10 kW, their
rated voltage being not more than 250 V for single-phase appliances and 480 V for other
appliances.
It also applies to industrial and commercial steam cleaners having a water container with a
capacity not exceeding 1 000 l, a rated pressure not exceeding 3,2 MPa and a product of
capacity and rated pressure not exceeding 300.
It is also applicable to appliances making use of other forms of energy for the motor, but it is
necessary that their influence is taken into consideration.
As far as it 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
– the use of appliances by young children or infirm persons without supervision,
– playing with the appliance by young children.
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 be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour, the national water supply authorities and similar authorities.
NOTE 102 This standard does not apply to
– appliances that are incorporated in process equipment;

– appliances intended to be used in locations where special conditions prevail, such as the presence of
corrosive or explosive atmosphere (vapour or gas);
– audio, video and similar electronic apparatus (IEC 60065);
– appliances for medical purposes (IEC 60601);
– hand-held motor-operated electric tools (IEC 60745);
– personal computers and similar equipment (IEC 60950);
– transportable motor-operated electric tools (IEC 61029);
– steam cleaners for household use only (IEC 60335-2-54).

60335-2-79  IEC:2002+A1:2004(E) – 7 –

2 Normative references
This clause of Part 1 is applicable except as follows.

Addition:
IEC 60364-1, Electrical installations of buildings – Part 1: Fundamental principles,

assessment of general characteristics, definitions

IEC 60704-1, Household and similar electrical appliances – Test code for the determination of

airborne acoustical noise – Part 1: General requirements
IEC 61558-2-3, Safety of power transformers, power supply units and similar – Part 2-3:
Particular requirements for ignition transformers for gas and oil burners
ISO 5349 (all parts), Mechanical vibration – Measurement and evaluation of human exposure
to hand-transmitted vibration
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The appliance is supplied at rated voltage and operated at rated flow and rated pressure
with the nozzle and hose specified by the manufacturer fitted to it; all strainers and filters are
in a clean operating condition and the unloader valve is set to the rated pressure. The
water heater, if fitted, is operated at maximum power.
Power outlets for accessories are loaded with a resistive load in accordance with the marking.
3.101
unloader valve
pressure operated valve which, when the pump pressure exceeds the preset value, returns
the excess fluid to the inlet system. In addition it bypasses the total pump flow at reduced
pressure when its outlet flow is cut off

3.102
safety valve
pressure operated valve which, when the pump or steam cleaner pressure exceeds the preset
value, returns the excess fluid or steam to the inlet system or into the atmosphere
3.103
rated pressure
maximum pressure at the pump or at the steam cleaner assigned to the appliance by the
manufacturer
3.104
permissible pressure
limiting pressure up to which an appliance and/or parts of the appliance can be operated
without impairing its integrity

– 8 – 60335-2-79  IEC:2002+A1:2004(E)

3.105
rated flow
flow at rated pressure at the nozzle assigned to the appliance by the manufacturer

3.106
water heater
means of heating water or cleaning agent by electricity, gas, liquid fuel or heat exchanger

3.107
cleaning agent
water with or without the addition of a soluble or miscible chemical
3.108
pressure switch
device which, in response to varying fluid pressure, provides a controlling function at a pre-set
value
3.109
flow switch
device which, in response to a varying rate of fluid flow, provides a controlling function at a
pre-set value
3.110
primary safety control
control device that responds directly to flame properties sensing the presence of flame and, in
event of ignition failure or unintentional flame extinguishment, causes safety shut down
NOTE Primary safety controls are also known as flame failure devices.
3.111
trigger gun
device that shuts off the supply of fluid through its outlet if the trigger is not held in its
operating position
3.112
continuous ignition
ignition by an energy source that is continuously maintained throughout the time the burner is
in service, whether the burner is firing or not
3.113
rated temperature
maximum temperature of the cleaning agent assigned by the manufacturer

3.114
pencil jet nozzle
nozzle that gives a concentrated, parallel water jet; also called needle jet nozzle, solid jet
nozzle or 0 degree jet nozzle
3.115
water jetter
high-pressure pipe-cleaning device, consisting of a nozzle at the end of a high-pressure hose
3.116
water-suction cleaning appliance
appliance for aspirating an aqueous solution that may contain foaming detergent

60335-2-79  IEC:2002+A1:2004(E) – 9 –

3.117
motorized cleaning head
accessory containing a motor that is supplied from the appliance and which is attached to the

end of a hand-held hose or tube

NOTE The main cleaning head permanently attached is not regarded as a motorized cleaning head.

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.
5.1 Addition:
The burner is operated at rated power. Appliances intended for operation at more than one
rated power are additionally tested at the most disadvantageous power.
The burner-air adjustment, where provided, is regulated to establish the air/fuel ratio to
produce the combustion characteristics recommended in the user instructions. The
combustion characteristics may be specified by the appearance of the flame, the percentage
of carbon dioxide (CO ) in the flue gases, or by other characteristics.
On appliances designed for use with a flue pipe, a section of flue pipe is attached to the
appliance. Flue gas determinations are taken in this flue pipe.
The draught is adjusted to that recommended in the instructions for use.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Appliances shall be class I, class II or class III with respect to the protection against electric
shock. However, hand-held appliances and hand-held parts of steam cleaners and high
pressure cleaners shall be class II or class III.

Compliance is checked by inspection and by the relevant tests.
6.2 Replacement:
The appliances shall have a degree of protection against harmful ingress of water according
to Table 101:
– 10 – 60335-2-79  IEC:2002+A1:2004(E)

Table 101 – Degree of protection against harmful ingress of water

Protection class Protection degree

(electric shock) (IEC 60529)
Steam cleaners I – II IPX4
for indoor use only
III IPX3
for outdoor use I-II-III IP X5

II IPX7
Hand-held parts
III IP X3
Hand-held appliances II-III IP X7
High pressure
Other types of appliances I-II-III IP X5
cleaners
Hand-held parts II-III IP X7
However, fixed appliances that are specified for installation in an independent room, where
they will not be subject to spillage or splashing of water, shall be at least IPX0.
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:
– rated pressure in Pascal;
– permissible pressure in Pascal;
– maximum rated flow in litre per minute;
– maximum rated temperature where this is above 50 ºC;
– serial number;
– year of production. The year of production may be indicated by the last two digits of the
year;
– maximum inlet water pressure in Pascal if not given in the instruction manual;
– maximum power of the water heater in kW.
NOTE 101 For electric heaters the input power is specified.

For gas-fired or oil-fired heaters the output power is specified.
A yellow label with black lines showing the substance of the warning symbols in accordance
with Figure 101 shall be permanently fixed to the appliance.
All pressure hoses shall be marked with the permissible pressure in megapascals and the
maximum temperature in degrees Celsius and shall be marked with the name of the
manufacturer and the date of production. These data may be coded.
The trigger gun and the spray lance shall be marked with the permissible pressure in
megapascals and the maximum temperature in degrees Celsius and with a mark giving the
manufacturer of the trigger gun.
NOTE 102 It is recommended that the safety valve should be marked with an identification.

60335-2-79  IEC:2002+A1:2004(E) – 11 –

When the surface of a flue or duct for exhaust gases from the heater exceeds a temperature
rise of 60 K, a warning notice shall be fitted near to the hot surface stating

WARNING: Hot. Do not touch.
or displaying symbol No. 5041 of IEC 60417-1.

The height of the lettering shall be not less than 4 mm.

Steam cleaners shall be marked with symbol IEC 60417-5597.

Add the following subclause:
7.6 Addition:
[symbol IEC 60417-5597 (DB:2002-10)]steam
[symbol IEC 60417-5935 (DB:2002-10] motorized cleaning head for

water-suction cleaning
7.12 Addition:
The cover of the instruction sheet shall carry the following:
WARNING: Do not use the appliance without reading the instruction sheet.
This warning may be replaced by symbol 0434 and symbol 1641 of ISO 7000. In this case the
meaning of these symbols shall be explained.
If symbol No. 5041 of IEC 60417-1 is marked on the appliance, its meaning shall be
explained.
The instructions shall contain the substance of the following.
– The electric supply connection shall be made by a qualified electrician and comply with

IEC 60364-1.
NOTE 101 It is recommended that the electric supply to this appliance should include either a residual current
device that will interrupt the supply if the leakage current to earth exceeds 30 mA for 30 ms or a device that will
prove the earth circuit.
– WARNING: This appliance has been designed for use with the cleaning agent supplied
or recommended by the manufacturer. The use of other cleaning agents or
chemicals may adversely affect the safety of the appliance.
– WARNING: Do not use the appliance within range of persons unless they wear protective
clothing.
– WARNING: High pressure jets can be dangerous if subject to misuse. The jet must not be
directed at persons, live electrical equipment or the appliance itself.
– Do not direct the jet against yourself or others in order to clean clothes or foot-wear.
– Disconnect from the electrical power supply before carrying out user maintenance.
– High pressure cleaners shall not be used by children or untrained personnel.

– 12 – 60335-2-79  IEC:2002+A1:2004(E)

– To ensure appliance safety, use only original spare parts from the manufacturer or

approved by the manufacturer.
– WARNING: High pressure hoses, fittings and couplings are important for the safety of the

appliance. Use only hoses, fittings and couplings recommended by the

manufacturer.
– Do not use the appliance if a supply cord or important parts of the appliance are

damaged, e.g. safety devices, high pressure hoses, trigger gun.

– If an extension cord is used, the plug and socket must be of watertight construction.

– WARNING: Inadequate extension cords can be dangerous.

– Where gas or liquid fuel are used the specification of the correct fuel and the following

warning:
• WARNING: Incorrect fuels shall not be used as they may prove hazardous.
– For oil fired appliances without a primary safety control, the statement:
• This appliance must be attended during operation.
– The intended use of the appliance.
– For gas or oil-heated appliances it is important to provide adequate ventilation and make
sure that the flue gases are properly discharged.
– Adequate information about the starting/stopping of the appliance and storage.
– For fixed appliances intended to be used in a dry independent room, and for steam
cleaners intended for indoor use only, the installation instructions shall carry the following
notice:
• Do not splash or wash down.
– Adequate information about the nozzles to be used, the danger of the kickback force and
the sudden torque on the spray assembly when opening the trigger gun.
– The kickback forces have to be given in the manual if they exceed 20 N.
– The functioning of the safety devices, e.g. safety valves, flow switches, pressure
switches.
– Adequate information about user maintenance.
– Adequate information about malfunction.
– Where provision is made for remote signalling, reference must be made to the wiring
installation requirements of the country.
– Adequate information about the connection with the water mains, including the maximum
inlet pressure, if not given on the rating plate.
– The A-weighted sound pressure level L in dB(A), emitted by the appliance. If the A
pA
weighted sound pressure level exceeds 85 dB(A), it shall also state the sound power level

L in dB(A) and that appropriate ear protection has to be used. The sound level is
WA
measured in accordance with IEC 60704-1.
– The weighted r.m.s. acceleration value to which the operators’ arms are subjected in m/s²,
separately for each arm (if applicable). The weighted r.m.s. acceleration value is
measured in accordance with ISO 5349 for arm vibrations, the appliance being supplied at
rated voltage or at the maximum rated voltage for machines with a range of voltages.
Instructions for use for water jetters (if applicable) shall be given, such as “Insert hose to red
mark before turning on the appliance”.

60335-2-79  IEC:2002+A1:2004(E) – 13 –

The instructions for appliances having a current-carrying hose operating at other than safety
extra-low voltage shall include the substance of the following:

CAUTION: This hose contains electrical connections:

– do not use to collect water;

– do not immerse in water for cleaning;

– the hose should be checked regularly and must not be used if damaged.

If the symbol IEC 60417-5935 is used, its meaning shall be explained.

7.14 Addition:
The height of symbol IEC 60417-5935 shall be at least 15 mm.
Compliance is checked by measurement.
7.101 Motorized cleaning heads shall be marked with
– rated voltage or rated voltage range in volts;
– rated power input in watts;
– name, trade mark or identification mark of the manufacturer or responsible vendor;
– model or type reference.
Motorized cleaning heads for water-suction cleaning appliances, except those of class III
construction having a working voltage up to 24 V shall be marked with symbol IEC 60417-
5935.
NOTE This symbol is an information sign and, except for the colours, the rules of ISO 3864-1 apply.
Compliance is checked by inspection.
7.102 Power outlets for accessories shall be marked with the maximum load in watts.
NOTE This marking may be on the appliance close to the appliance outlet.
Compliance is checked by inspection.
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.

8.1 Addition:
NOTE 101 Water and water-borne cleaning agents are considered as being conductive.
8.1.4 Addition:
Isolated battery systems of 18 to 24 cells of either acid or alkaline electrochemistry, including
gel batteries, shall be regarded as class III provided that
– the maximum voltage per cell on charge does not exceed 2,7 V;
– there are no earthed parts;
– conductive parts cannot fall on to and thereby bridge live parts of opposite polarity.

– 14 – 60335-2-79  IEC:2002+A1:2004(E)

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 except as follows.

10.1 Addition:
The power input of motorized cleaning heads is measured separately.
10.101 At normal operation the pressure shall not deviate more than ± 10 % from the rated
pressure, and the permissible pressure shall not be exceeded.
NOTE The burner performance is adjusted in accordance with the manufacturer's instructions.
Compliance is checked by measurement.
The permissible pressure shall not exceed 1,5 times the rated pressure.
11 Heating
This clause of Part 1 is applicable except as follows.
11.4 Modification:
Replace "Heating appliances" by "Electric heating appliances".
11.7 Addition:
Appliances are operated until steady conditions are established.
11.101 The maximum temperature of the flue gases shall not exceed 400 ºC.
The required test observations shall be recorded for any test input for the appliance. After
15 min of operation, samples of the flue gas shall be taken at a point between the flue outlet
and the draught hood. Operation is considered to be stable when three consecutive samples

taken at 15 min intervals show consistent analysis values.
The amount of smoke in the flue gases shall not exceed,
– for atomising and wall burners, that corresponding to a No. 2 Shell-Bacharach smoke spot;
– for vaporising burners, that corresponding to a No. 2 Shell-Bacharach smoke spot.
The amount of carbon monoxide (CO) in the flue gases shall not exceed 0,04 % (volume) on
an air-free and dry basis.
Compliance is checked by measurements under the conditions specified in 11.2 to 11.7.

60335-2-79  IEC:2002+A1:2004(E) – 15 –

11.102 Hoses, spray lances and fittings containing the cleaning agent shall not exceed the
rated temperature.
Compliance is checked by measurement under the conditions specified in 11.2 to 11.7.

11.103 The temperature rise of external enclosures that form part of exhausts or ducts from
a combustion chamber and the temperature rise of flue gases have no limit.

Adequate protection against unintentional contact with hot metal parts by the user shall be
ensured.
The temperature rise of the protection means shall not exceed 60 K.
Compliance is checked by inspection and by measurement under the conditions specified in
11.2 to 11.7.
11.104 Where liquid fuel is used the temperature of the fuel in the tank shall be at a
maximum of 10 ºC below the flash-point temperature, if there is a source of ignition in contact
with the air/fuel mixture.
Compliance is checked by measurement under the conditions specified in 11.2 to 11.7.
12 Void
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.
15.2 Replacement:
Appliances shall be constructed so that spillage of liquid due to normal operation, overfilling
or overturning of unstable appliances and hand-held appliances does not affect their
electrical insulation.
NOTE 101 An appliance is considered to be unstable if it overturns when a force of 180 N is applied to the top of
the appliance in the most unfavourable horizontal direction. The appliance is placed on a support inclined at an
angle of 10º to the horizontal, the liquid container being filled to half the level indicated in the instructions for use.
Compliance is checked by the following test.

– 16 – 60335-2-79  IEC:2002+A1:2004(E)

Appliances with type X attachment, except those having a specially prepared cord, are fitted
with the lightest permissible type of flexible cord of the smallest cross-sectional area specified

in Table 11.
Appliances incorporating an appliance inlet are tested with or without an appropriate

connector in position, whichever is most unfavourable.

Liquid containers that are filled by hand are completely filled with water containing

approximately 1% NaCl and a further quantity, equal to 15% of the capacity of the container

or 0,25 l, whichever is the greater, is poured in steadily over a period of 1 min.

Hand-held appliances and appliances that are unstable are then, with the containers
completely filled for the float tank, if any, and with the most conductive detergent
recommended by the manufacturer for the detergent tank, if any, and with the cover lid in
place, overturned from the most unfavourable of the normal positions of use, and are left in
that position for 5 min, unless the appliance returns automatically to its normal position of
use.
Motorized cleaning heads of water-suction cleaning appliances are placed in a container,
the base of which is level with the surface supporting the appliance. The container is filled
with a detergent solution to a level of 5 mm above its base, this level being maintained
throughout the test. The solution consists of 20 g of NaCl and 1 ml of a solution of 28 % by
mass of dodecyl sodium sulphate in each 8 l of water.
The appliance is operated until its liquid container is completely full and for a further 5 min.
NOTE 102 The solution is to be stored in a cool atmosphere and used within seven days of its preparation.
NOTE 103 The chemical designation of dodecyl sodium sulphate is C H NaSO .
12 25 4
After each of these tests, the appliance shall withstand the electric strength test of 16.3.
Inspection shall show that there is no trace of liquid on insulation that could result in a
reduction of clearances or creepage distances below the values specified in Clause 29.
15.3 Modification:
The relative humidity shall be 93 % ± 6 %.
15.101 Motorized cleaning heads of water suction cleaning appliances shall be resistant
to liquids that may come into contact with them.

Compliance is checked by the following tests.
The motorized cleaning head is subjected to an impact test as described in IEC 60068-2-75,
the value of the impact being 2 J. The motorized cleaning head is rigidly supported and
three blows are applied to every point of the enclosure that is likely to be weak.
It is then subjected to the free fall test procedure 1 of IEC 60068-2-32. It is dropped 4 000
times from a height of 100 mm onto a steel plate having a thickness of not less than 15 mm. It
is dropped
– 1000 times on its right side;
– 1000 times on its left side;
– 1000 times on its front face;
– 1000 times on its cleaning surface.

60335-2-79  IEC:2002+A1:2004(E) – 17 –

The motorized cleaning head is then subjected to the test described in 14.2.7 of IEC 60529,
the water containing approximately 1% NaCl.

The motorized cleaning head shall then withstand the electric strength test of 16.3 the
voltage being applied between the live parts and the solution and inspection shall show that

there is no trace of saline solution on insulation which could result in a reduction of

clearances and creepage distances below the values specified in Clause 29.

NOTE The test is not carried out on motorized cleaning heads of class III construction having a working
voltage up to 24V.
16 Leakage current and electric strength
This clause of Part 1 is applicable except as follows.
16.3 Addition:
Current-carrying hoses, except for their electrical connections, are immersed for 1 h in water
containing approximately 1 % NaCl, at a temperature of 20 °C ± 5 °C. While the hose is still
immersed, a voltage of 2 000 V is applied for 5 min between each conductor and all the other
conductors connected together. A voltage of 3 000 V is then applied for 1 min between all the
conductors and the saline solution.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is applicable except as follows.
18.101 Appliances shall be constructed so that, in normal use, there will be no electrical or
mechanical failure that could impair compliance with this standard. The insulation shall not be
damaged and contacts and connections shall not work loose as result of heating, vibration,
etc.
Moreover, overload protective devices and safety valves shall not operate under normal
operation.
For motor-operated appliances, compliance is checked by the tests of 18.102 and 18.106,
and by such of the additional tests of 18.103 to 18.105 as applicable.
18.102 The appliance is operated under normal operation and at rated voltage for 96 h,
reduced by the running time necessary for the tests of Clauses 11 and 13.
Appliances are operated continuously, or for a corresponding number of periods, each period
being not less than 8 h.
The specified operating time is the actual running time.
If the appliance incorporates more than one motor, the operating times specified apply to
each motor separately.
– 18 – 60335-2-79  IEC:2002+A1:2004(E)

The test shall be carried out with a cleaning agent that has not been heated.

All hoses are coiled on concrete during this test.

18.103 Appliances are started under normal operation, 50 times at a voltage equal to

1,1 times rated voltage and 50 times at a voltage equal to 0,85 times rated voltage, the
duration of each period of supply being at least equal to ten times the time necessary from
start of full speed, but not less than 10 s.

An interval sufficient to prevent overheating and at least equal to three times the period of
supply is introduced after each running period.

18.104 Appliances provided with a centrifugal or other automatic starting switch are started
10 000 times under normal operation and at a voltage equal to 0,9 times rated voltage, the
operating cycle being that specified in 18.103.
Forced cooling may be used, if necessary.
18.105 Appliances provided with self-resetting thermal cut-outs are supplied at a voltage
equal to 1,1 times rated voltage, under such a load as will cause the thermal cut-out to
operate within a few minutes until the thermal cut-out has performed 200 cycles of operation.
18.106 During the tests of 18.102 and 18.103, over
...

IEC 60335-2-79
Edition 2.2 2007-09
INTERNATIONAL
STANDARD
Household and similar electrical appliances – Safety –
Part 2-79: Particular requirements for high pressure cleaners and steam cleaners

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IEC 60335-2-79
Edition 2.2 2007-09
INTERNATIONAL
STANDARD
Household and similar electrical appliances – Safety –
Part 2-79: Particular requirements for high pressure cleaners and steam cleaners

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
CQ
ICS 97.080 ISBN 2-8318-9287-2
– 2 – 60335-2-79 © IEC:2002+A1:2004
+A2:2007(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .8
3 Definitions .8
4 General requirement.10
5 General conditions for the tests .10
6 Classification.10
7 Marking and instructions.11
8 Protection against access to live parts.15
9 Starting of motor-operated appliances .15
10 Power input and current .15
11 Heating .15
12 Void.16
13 Leakage current and electric strength at operating temperature.16
14 Transient overvoltages .17
15 Moisture resistance .17
16 Leakage current and electric strength.18
17 Overload protection of transformers and associated circuits .18
18 Endurance.18
19 Abnormal operation .20
20 Stability and mechanical hazards .22
21 Mechanical strength .23
22 Construction .24
23 Internal wiring.27
24 Components .27
25 Supply connection and external flexible cords .28
26 Terminals for external conductors.29
27 Provision for earthing .29
28 Screws and connections .29
29 Clearances, creepage distances and solid insulation .29
30 Resistance to heat and fire.29
31 Resistance to rusting.29
32 Radiation, toxicity and similar hazards.29

Annexes .34
Annex AA (normative) Requirements to avoid backsiphonage.35
Annex BB (normative) Analysis method for determining the necessary safety device
to prevent backsiphonage .41

60335-2-79 © IEC:2002+A1:2004 – 3 –
+A2:2007(E)
Bibliography.44

Figure 101 – Warning symbol .30
Figure 102 – Impact test apparatus.31
Figure 103 – Reactions on handle.32
Figure 104 – Warning symbol: Appliance not suitable for connection
to the potable water mains.33
Figure 105 – Warning symbol: Do not inhale fumes .33
Figure AA.1 – Arrangement for the durability test on backflow preventers
with reduced pressure zone .40
Figure BB.1 – Example for an air break to drain.43

– 4 – 60335-2-79 © IEC:2002+A1:2004
+A2:2007(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-79: Particular requirements for
high pressure cleaners and steam cleaners

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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.
This part of International Standard IEC 60335 has been prepared by sub-committee 61J:
Electrical motor-operated cleaning appliances for industrial use, of IEC technical committee 61:
Safety of household and similar electrical appliances.
This consolidated version of IEC 60335-2-79 consists of the second edition (2002)
[documents 61J/128/FDIS and 61J/133/RVD], its amendment 1 (2004) [documents
61J/165/FDIS and 61J/171/RVD] and its amendment 2 (2007) [documents 61J/252/FDIS and
61J/258/RVD].
The technical content is therefore identical to the base edition and its amendment and has
been prepared for user convenience.
It bears the edition number 2.2.
A vertical line in the margin shows where the base publication has been modified by
amendments 1 and 2.
60335-2-79 © IEC:2002+A1:2004 – 5 –
+A2:2007(E)
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) 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: Safety requirements for electric high pressure
cleaners and steam cleaners.
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 the base publication and its amendments will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The following differences exist in the countries indicated below.
– Clause 1: Different pressure limitations apply (USA).
– 6.1: Ground fault current interrupters are required for appliances rated 250 V or less, single phase (USA).
– 7.12: No requirements for sound and vibration markings exist (USA).
– 11.101: The losses of burners are subject to regulations (Germany). Smoke spot requirements are different
(USA).
– 20.103: The fuel tank capacity is limited (USA).
– 21.101, 21.101.2 and 21.102: Different burner tests are required (USA).
– 25.7: Different power supply cord lengths are required (Canada, USA).
– Clause 32: The connection with the water mains is subject to regulations (Canada).

A bilingual version of this publication may be issued at a later date.

– 6 – 60335-2-79 © IEC:2002+A1:2004
+A2:2007(E)
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.
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.
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.
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.
60335-2-79 © IEC:2002+A1:2004 – 7 –
+A2:2007(E)
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-79: Particular requirements for
high pressure cleaners and steam cleaners

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of high pressure cleaners for household,
industrial and commercial use having a pressure not less than 2,5 MPa and not more than
25 MPa and with an input to the drive for the high pressure pump not exceeding 10 kW, their
rated voltage being not more than 250 V for single-phase appliances and 480 V for other
appliances.
It also applies to industrial and commercial steam cleaners having a water container with a
capacity not exceeding 1 000 l, a rated pressure not exceeding 3,2 MPa and a product of
capacity and rated pressure not exceeding 300.
It is also applicable to appliances making use of other forms of energy for the motor, but it is
necessary that their influence is taken into consideration.
As far as it 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
– the use of appliances by young children or infirm persons without supervision,
– playing with the appliance by young children.
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 be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour, the national water supply authorities and similar authorities.
NOTE 102 This standard does not apply to
– appliances that are incorporated in process equipment;
– appliances intended to be used in locations where special conditions prevail, such as the presence of
corrosive or explosive atmosphere (vapour or gas);
– audio, video and similar electronic apparatus (IEC 60065);
– appliances for medical purposes (IEC 60601);
– hand-held motor-operated electric tools (IEC 60745);
– personal computers and similar equipment (IEC 60950);
– transportable motor-operated electric tools (IEC 61029);
– steam cleaners for household use only (IEC 60335-2-54).

– 8 – 60335-2-79 © IEC:2002+A1:2004
+A2:2007(E)
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60364-1, Electrical installations of buildings – Part 1: Fundamental principles,
assessment of general characteristics, definitions
IEC 60704-1, Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise – Part 1: General requirements
IEC 61558-2-3, Safety of power transformers, power supply units and similar – Part 2-3:
Particular requirements for ignition transformers for gas and oil burners
ISO 5349 (all parts), Mechanical vibration – Measurement and evaluation of human exposure
to hand-transmitted vibration
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The appliance is supplied at rated voltage and operated at rated flow and rated pressure
with the nozzle and hose specified by the manufacturer fitted to it; all strainers and filters are
in a clean operating condition and the unloader valve is set to the rated pressure. The
water heater, if fitted, is operated at maximum power.
Power outlets for accessories are loaded with a resistive load in accordance with the marking.
3.101
unloader valve
pressure operated valve which, when the pump pressure exceeds the preset value, returns
the excess fluid to the inlet system. In addition it bypasses the total pump flow at reduced
pressure when its outlet flow is cut off
3.102
safety valve
pressure operated valve which, when the pump or steam cleaner pressure exceeds the preset
value, returns the excess fluid or steam to the inlet system or into the atmosphere
3.103
rated pressure
maximum pressure at the pump or at the steam cleaner assigned to the appliance by the
manufacturer
3.104
permissible pressure
limiting pressure up to which an appliance and/or parts of the appliance can be operated
without impairing its integrity

60335-2-79 © IEC:2002+A1:2004 – 9 –
+A2:2007(E)
3.105
rated flow
flow at rated pressure at the nozzle assigned to the appliance by the manufacturer
3.106
water heater
means of heating water or cleaning agent by electricity, gas, liquid fuel or heat exchanger
3.107
cleaning agent
water with or without the addition of a soluble or miscible chemical
3.108
pressure switch
device which, in response to varying fluid pressure, provides a controlling function at a pre-set value
3.109
flow switch
device which, in response to a varying rate of fluid flow, provides a controlling function at a
pre-set value
3.110
primary safety control
control device that responds directly to flame properties sensing the presence of flame and, in
event of ignition failure or unintentional flame extinguishment, causes safety shut down
NOTE Primary safety controls are also known as flame failure devices.
3.111
trigger gun
device that shuts off the supply of fluid through its outlet if the trigger is not held in its
operating position
3.112
continuous ignition
ignition by an energy source that is continuously maintained throughout the time the burner is
in service, whether the burner is firing or not
3.113
rated temperature
maximum temperature of the cleaning agent assigned by the manufacturer
3.114
pencil jet nozzle
nozzle that gives a concentrated, parallel water jet; also called needle jet nozzle, solid jet
nozzle or 0 degree jet nozzle
3.115
water jetter
high-pressure pipe-cleaning device, consisting of a nozzle at the end of a high-pressure hose

3.116
motorized cleaning head
accessory containing a motor that is supplied from the appliance and which is attached to the
end of a hand-held hose or tube
NOTE The main cleaning head permanently attached is not regarded as a motorized cleaning head.

– 10 – 60335-2-79 © IEC:2002+A1:2004
+A2:2007(E)
3.117
low pressure accessory
accessories to be connected to a high pressure cleaner equipped with one or more nozzles
with an equivalent diameter exceeding 2 mm
NOTE 101 Nozzles with an equivalent diameter exceeding 2 mm used in a high pressure cleaner system are not
considered to become clogged.
NOTE 102 Typical examples of low pressure accessories are washing brushes, foam nozzles, washing
sponges.
3.118
hand-guided appliance
appliance to be moved on the floor while in operation, guided by a mechanically coupled
handle
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.
5.1 Addition:
The burner is operated at rated power. Appliances intended for operation at more than one
rated power are additionally tested at the most disadvantageous power.
The burner-air adjustment, where provided, is regulated to establish the air/fuel ratio to
produce the combustion characteristics recommended in the user instructions. The
combustion characteristics may be specified by the appearance of the flame, the percentage
of carbon dioxide (CO ) in the flue gases, or by other characteristics.
On appliances designed for use with a flue pipe, a section of flue pipe is attached to the
appliance. Flue gas determinations are taken in this flue pipe.
The draught is adjusted to that recommended in the instructions for use.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Appliances shall be class I, class II or class III with respect to the protection against electric
shock. However, hand-held appliances and hand-held parts of steam cleaners and high
pressure cleaners shall be class II or class III.
Compliance is checked by inspection and by the relevant tests.
6.2 Replacement:
The appliances shall have a degree of protection against harmful ingress of water according
to Table 101:
60335-2-79 © IEC:2002+A1:2004 – 11 –
+A2:2007(E)
Table 101 – Degree of protection against harmful ingress of water
Protection class Protection degree
(electric shock) (IEC 60529)
Steam cleaners I – II IPX4
for indoor use only
III IPX3
for outdoor use I-II-III IP X5
II IPX7
Hand-held parts
III IP X3
Hand-held appliances II-III IP X7
High pressure
Other types of appliances I-II-III IP X5
cleaners
Hand-held parts II-III IP X7
However, fixed appliances that are specified for installation in an independent room, where
they will not be subject to spillage or splashing of water, shall be at least IPX0.
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:
– rated pressure in Pascal;
– permissible pressure in Pascal;
– maximum rated flow in litre per minute;
– maximum rated temperature where this is above 50 ºC;
– serial number;
– year of production. The year of production may be indicated by the last two digits of the
year;
– maximum inlet water pressure in Pascal if not given in the instruction manual;
– maximum power of the water heater in kW.
NOTE 101 For electric heaters the input power is specified.
For gas-fired or oil-fired heaters the output power is specified.
A yellow label with black lines showing the substance of the warning symbols in accordance
with Figure 101 shall be permanently fixed to the appliance.
All pressure hoses shall be marked with a pressure of at least the permissible pressure in
megapascals and the maximum temperature in degrees Celsius and shall be marked with the
name of the manufacturer and the date of production. These data may be coded.
NOTE 102 For low pressure accessories, no marking of the permissible pressure is necessary.
The trigger gun and the spray lance shall be marked with the permissible pressure in
megapascals and the maximum temperature in degrees Celsius and with a mark giving the
manufacturer of the trigger gun.
NOTE 103 It is recommended that the safety valve should be marked with an identification.

– 12 – 60335-2-79 © IEC:2002+A1:2004
+A2:2007(E)
When the surface of a flue or duct for exhaust gases from the heater exceeds a temperature
rise of 60 K, a warning notice shall be fitted near to the hot surface stating
WARNING: Hot. Do not touch.
or displaying symbol No. 5041 of IEC 60417-1.
The height of the lettering shall be not less than 4 mm.
Steam cleaners shall be marked with symbol IEC 60417-5597.
Appliances not intended to be connected to the potable water mains shall be marked with the
symbol according to Figure 104. It is acceptable to show this symbol in monochrome colour.
Appliances that can be used indoors and are powered by internal combustion engines, except
LPG-powered engines, shall be marked with the symbol according to Figure 105. It is
acceptable to show this symbol in monochrome colour.
Add the following subclause:
7.6 Addition:
[symbol IEC 60417-5597 (DB:2002-10)]  steam

[symbol IEC 60417-5935 (DB:2002-10] motorized cleaning head for

water-suction cleaning
7.12 Addition:
The cover of the instruction sheet shall carry the following:
WARNING: Do not use the appliance without reading the instruction sheet.
This warning may be replaced by symbol 0434 and symbol 1641 of ISO 7000. In this case the
meaning of these symbols shall be explained.
If symbol No. 5041 of IEC 60417-1 is marked on the appliance, its meaning shall be
explained.
The instructions shall contain the substance of the following.
– The electric supply connection shall be made by a qualified electrician and comply with
IEC 60364-1.
NOTE 101 It is recommended that the electric supply to this appliance should include either a residual current
device that will interrupt the supply if the leakage current to earth exceeds 30 mA for 30 ms or a device that will
prove the earth circuit.
– WARNING: This appliance has been designed for use with the cleaning agent supplied
or recommended by the manufacturer. The use of other cleaning agents or
chemicals may adversely affect the safety of the appliance.

60335-2-79 © IEC:2002+A1:2004 – 13 –
+A2:2007(E)
– WARNING: Do not use the appliance within range of persons unless they wear protective
clothing.
– WARNING: High pressure jets can be dangerous if subject to misuse. The jet must not be
directed at persons, live electrical equipment or the appliance itself.
– Do not direct the jet against yourself or others in order to clean clothes or foot-wear.
– Disconnect from the electrical power supply before carrying out user maintenance.
– High pressure cleaners shall not be used by children or untrained personnel.
– To ensure appliance safety, use only original spare parts from the manufacturer or
approved by the manufacturer.
– WARNING: High pressure hoses, fittings and couplings are important for the safety of the
appliance. Use only hoses, fittings and couplings recommended by the
manufacturer.
– Do not use the appliance if a supply cord or important parts of the appliance are
damaged, e.g. safety devices, high pressure hoses, trigger gun.
– If an extension cord is used, the plug and socket must be of watertight construction.
– WARNING: Inadequate extension cords can be dangerous.
– Where gas or liquid fuel are used the specification of the correct fuel and the following
warning:
• WARNING: Incorrect fuels shall not be used as they may prove hazardous.
– For oil fired appliances without a primary safety control, the statement:
• This appliance must be attended during operation.
– The intended use of the appliance.
– For gas or oil-heated appliances it is important to provide adequate ventilation and make
sure that the flue gases are properly discharged.
– Adequate information about the starting/stopping of the appliance and storage.
– For fixed appliances intended to be used in a dry independent room, and for steam
cleaners intended for indoor use only, the installation instructions shall carry the following
notice:
• Do not splash or wash down.
– Adequate information about the nozzles to be used, the danger of the kickback force and
the sudden torque on the spray assembly when opening the trigger gun.
– The kickback forces have to be given in the manual if they exceed 20 N.
– The functioning of the safety devices, e.g. safety valves, flow switches, pressure
switches.
– Adequate information about user maintenance.
– Adequate information about malfunction.
– Where provision is made for remote signalling, reference must be made to the wiring
installation requirements of the country.
– Adequate information about the connection with the water mains, including the maximum
inlet pressure, if not given on the rating plate.
– The A-weighted sound pressure level L in dB(A), emitted by the appliance. If the A
pA
weighted sound pressure level exceeds 85 dB(A), it shall also state the sound power level
L in dB(A) and that appropriate ear protection has to be used. The sound level is
WA
measured in accordance with IEC 60704-1.
– The weighted r.m.s. acceleration value to which the operators’ arms are subjected in m/s²,
separately for each arm (if applicable). The weighted r.m.s. acceleration value is
measured in accordance with ISO 5349 for arm vibrations, the appliance being supplied at
rated voltage or at the maximum rated voltage for machines with a range of voltages.

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+A2:2007(E)
Instructions for use for water jetters (if applicable) shall be given, such as “Insert hose to red
mark before turning on the appliance”.
The instructions for appliances having a current-carrying hose operating at other than safety
extra-low voltage shall include the substance of the following:
CAUTION: This hose contains electrical connections:
– do not use to collect water;
– do not immerse in water for cleaning;
– the hose should be checked regularly and must not be used if damaged.
If the symbol IEC 60417-5935 is used, its meaning shall be explained.
The instructions shall contain the substance of the following, if applicable.
– WARNING: Do not use combustion engine powered appliances indoors unless adequate
ventilation is assessed by national labour authorities.
– WARNING: Ensure that any exhaust emissions are not in the vicinity of air intakes.
For appliances intended to be connected to the potable water mains, the instruction shall
contain the substance of the following, if applicable:
– adequate information for the correct connection to the potable water mains;
– necessary length and quality of the water supply hose;
– necessary measures for conversion of the connection from water mains supply to supply
from other water sources.
For appliances not intended to be connected to the water mains, the instruction shall contain
the substance of the following, if applicable:
– adequate information for the correct connection to the water supply;
– adequate information about suction operation;
– necessary length and quality of the water supply hose;
– necessary measures for conversion of the connection from supply from other water
sources to supply from the potable water mains (if applicable).
For all appliances, the instruction shall contain the substance of the following:
– water that has flown through backflow preventers is considered to be non-potable.
7.14 Addition:
The height of symbol IEC 60417-5935 shall be at least 15 mm.
Compliance is checked by measurement.
7.101 Motorized cleaning heads shall be marked with
– rated voltage or rated voltage range in volts;
– rated power input in watts;
– name, trade mark or identification mark of the manufacturer or responsible vendor;
– model or type reference.
60335-2-79 © IEC:2002+A1:2004 – 15 –
+A2:2007(E)
Motorized cleaning heads, except those of class III construction having a working voltage
up to 24 V shall be marked with symbol IEC 60417-5935.
NOTE This symbol is an information sign and, except for the colours, the rules of ISO 3864-1 apply.
Compliance is checked by inspection.
7.102 Power outlets for accessories shall be marked with the maximum load in watts.
NOTE This marking may be on the appliance close to the appliance outlet.
Compliance is checked by inspection.
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.
8.1 Addition:
NOTE 101 Water and water-borne cleaning agents are considered as being conductive.
8.1.4 Addition:
Isolated battery systems of 18 to 24 cells of either acid or alkaline electrochemistry, including
gel batteries, shall be regarded as class III provided that
– the maximum voltage per cell on charge does not exceed 2,7 V;
– there are no earthed parts;
– conductive parts cannot fall on to and thereby bridge live parts of opposite polarity.
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 except as follows.
10.1 Addition:
The power input of motorized cleaning heads is measured separately.
10.101 At normal operation the pressure shall not deviate more than ± 10 % from the rated
pressure, and the permissible pressure shall not be exceeded.
NOTE The burner performance is adjusted in accordance with the manufacturer's instructions.
Compliance is checked by measurement.
The permissible pressure shall not exceed 1,5 times the rated pressure.
11 Heating
This clause of Part 1 is applicable except as follows.

– 16 – 60335-2-79 © IEC:2002+A1:2004
+A2:2007(E)
11.4 Modification:
Replace "Heating appliances" by "Electric heating appliances".
11.7 Addition:
Appliances are operated until steady conditions are established.
11.101 The maximum temperature of the flue gases shall not exceed 400 ºC.
The required test observations shall be recorded for any test input for the appliance. After
15 min of operation, samples of the flue gas shall be taken at a point between the flue outlet
and the draught hood. Operation is considered to be stable when three consecutive samples
taken at 15 min intervals show consistent analysis values.
The amount of smoke in the flue gases shall not exceed,
– for atomising and wall burners, that corresponding to a No. 2 Shell-Bacharach smoke spot;
– for vaporising burners, that corresponding to a No. 2 Shell-Bacharach smoke spot.
The amount of carbon monoxide (CO) in the flue gases shall not exceed 0,04 % (volume) on
an air-free and dry basis.
Compliance is checked by measurements under the conditions specified in 11.2 to 11.7.
11.102 Hoses, spray lances and fittings containing the cleaning agent shall not exceed the
rated temperature.
Compliance is checked by measurement under the conditions specified in 11.2 to 11.7.
11.103 The temperature rise of external enclosures that form part of exhausts or ducts from
a combustion chamber and the temperature rise of flue gases have no limit.
Adequate protection against unintentional contact with hot metal parts by the user shall be
ensured.
The temperature rise of the protection means shall not exceed 60 K.
Compliance is checked by inspection and by measurement under the conditions specified in
11.2 to 11.7.
11.104 Where liquid fuel is used the temperature of the fuel in the tank shall be at a
maximum of 10 ºC below the flash-point temperature, if there is a source of ignition in contact
with the air/fuel mixture.
Compliance is checked by measurement under the conditions specified in 11.2 to 11.7.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.

60335-2-79 © IEC:2002+A1:2004 – 17 –
+A2:2007(E)
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.2 Replacement:
Appliances shall be constructed so that spillage of liquid due to normal operation, overfilling
or overturning of unstable, hand-guided appliances and hand-held appliances does not
affect their electrical insulation.
NOTE 101 An appliance is considered to be unstable if it overturns when a force of 180 N is applied to the top of
the appliance in the most unfavourable horizontal direction. The appliance is placed on a support inclined at an
angle of 10º to the horizontal, the liquid container being filled to half the level indicated in the instructions for use.
Compliance is checked by the following test.
Appliances with type X attachment, except those having a specially prepared cord, are fitted
with the lightest permissible type of flexible cord of the smallest cross-sectional area specified
in Table 11.
Hand-guided appliances and hand-held appliances and appliances that are unstable are
then, with the containers completely filled for the float tank, if any, and with the most
conductive detergent recommended by the manufacturer for the detergent tank, if any, and
with the cover lid in place, overturned from the most unfavourable of the normal positions of
use, and are left in that position for 5 min, unless the appliance returns automatically to its
normal position of use.
Liquid containers that are filled by hand are completely filled with water containing
approximately 1% NaCl and a further quantity, equal to 15% of the capacity of the container
or 0,25 l, whichever is the greater, is poured in steadily over a period of 1 min.
Hand-held appliances and appliances that are unstable are then, with the containers
completely filled for the float tank, if any, and with the most conductive detergent
recommended by the manufacturer for the detergent tank, if any, and with the cover lid in
place, overturned from the most unfavourable of the normal positions of use, and are left in
that position for 5 min, unless the appliance returns automatically to its normal position of
use.
Motorized cleaning heads are placed in a container, the base of which is level with the surface
supporting the appliance. The container is filled with a detergent solution to a level of 5 mm
above its base, this level being maintained throughout the test. The solution consists of 20 g of
NaCl and 1 ml of a solution of 28 % by mass of dodecyl sodium sulphate in each 8 l of water.
The appliance is operated until its liquid container is completely full and for a further 5 min.
NOTE 102 The solution is to be stored in a cool atmosphere and used within seven days of its preparation.
NOTE 103 The chemical designation of dodecyl sodium sulphate is C H NaSO .
12 25 4
After each of these tests, the appliance shall withstand the electric strength test of 16.3.
Inspection shall show that there is no trace of liquid on insulation that could result in a
reduction of clearances or creepage distances below the values specified in Clause 29.

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15.3 Modification:
The relative humidity shall be 93 % ± 6 %.
15.101 Motorized cleaning heads of shall be resistant to liquids that may come into contact
with them.
Compliance is checked by the following tests.
The motorized cleaning head is subjected to an impact test as described in IEC 60068-2-75,
the value of the impact being 2 J. The motorized cleaning head is rigidly supported and
three blows are applied to every point of the enclosure that is likely to be weak.
It is then subjected to the free fall test procedure 1 of IEC 60068-2-32. It is dropped 4 000
times from a height of 100 mm onto a steel plate having a thickness of not less than 15 mm. It
is dropped
– 1000 times on its right side;
– 1000 times on its left side;
– 1000 times on its front face;
– 1000 times on its cleaning surface.
The motorized cleaning head is then subjected to the test described in 14.2.7 of IEC 60529,
the water containing approximately 1% NaCl.
The motorized cleaning head shall then withstand the electric strength test of 16.3 the
voltage being applied between the live parts and the solution and inspection shall show that
there is no trace of saline solution on insulation which could result in a reduction of
clearances and creepage distances below the values specified in
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