prEN IEC 60335-2-79:2026

• Abstract:

  This standard deals with the safety of high-pressure cleaners without traction drive, intended for household and commercial indoor or outdoor use, having a rated pressure not less than 2,5 MPa and not exceeding 35 MPa. It also applies to steam cleaners and those parts of hot water high pressure cleaners incorporating a steam stage which have a capacity not exceeding 100 l, a rated pressure not exceeding 2,5 MPa and a product of capacity and rated pressure not exceeding 5 MPa·l. They are not equipped with a traction drive. The following power systems of the drive for the high pressure pump are covered: - mains powered motors up to a rated voltage of 250 V for single-phase machines and 480 V for other machines, - battery-operated motors, - internal combustion engines, - hydraulic or pneumatic motors. This standard does not apply to: - high pressure water jet machines having a rated pressure exceeding 35 MPa; - liquid or steam cleaners intended for domestic use (IEC 60335-2-54); - hand-held and transportable motor-operated electric tools (IEC 60745 series, IEC 61029 series, IEC 62841 series); - appliances for medical purposes (IEC 60601); - agricultural sprayers (ISO 4254-6); - non-liquid, solid abrasive cleaners; - machines designed to be part of a production process; - machines designed for use in corrosive or explosive environments (dust, vapour or gas); - machines designed for use in vehicles or on board of ships or aircraft.

• Status: Not Published
• Publication Date: 01-May-2028
• ICS: 97.080 - Cleaning appliances
• Technical Committee: CLC/TC 61 - Safety of household and similar electrical appliances
• Drafting Committee: CLC/TC 61/WG 10 - Commercial cleaning machines
• Current Stage: 4020 - Enquiry circulated - Enquiry
• Start Date: 04-Sep-2026
• Due Date: 28-Oct-2026
• Completion Date: 04-Sep-2026
• Ref Project: oSIST prEN IEC 60335-2-79:2026 - Household and similar electrical appliances - Safety - Part 2-79: Particular requirements for high pressure cleaners and steam cleaners

• Refers: EN IEC 61558-2-3:2025 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-3: Particular requirements and tests for ignition transformers for gas and oil burners
• Effective Date: 07-Jul-2026
• Refers: FprHD 60364-1:2025 - Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, and definitions
• Effective Date: 07-Jul-2026
• Refers: EN 61770:2009 - Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
• Effective Date: 07-Jul-2026
• Amended By: prEN IEC 60335-2-79:2026/prAA:2026 - Household and similar electrical appliances - Safety - Part 2-79: Particular requirements for high pressure cleaners and steam cleaners
• Effective Date: 20-Jan-2026
• Revises: EN 60335-2-79:2012 - Household and similar electrical appliances - Safety - Part 2-79: Particular requirements for high pressure cleaners and steam cleaners
• Effective Date: 08-Oct-2025

Overview

prEN IEC 60335-2-79:2026 specifies the safety requirements for high pressure cleaners and steam cleaners used for household and similar purposes. This European standard addresses machines operated without traction drive, with rated pressure between 2.5 MPa and 35 MPa, and steam cleaners or hot water pressure cleaners with a capacity up to 100 liters and rated pressure not exceeding 2.5 MPa. It encompasses cleaners intended for both commercial and domestic environments, powered by mains electricity, batteries, internal combustion engines, hydraulic, or pneumatic motors.

Developed by CLC (CENELEC), this standard is integral for manufacturers, designers, and regulatory professionals involved with the safety compliance of high pressure cleaning appliances. The requirements ensure safe operation, durability, proper marking, and protection against hazards associated with high-pressure water or steam.

Key Topics

• Scope and Applicability

  • Covers high pressure cleaners without traction drive for household and commercial use
  • Applies to steam cleaners and hot water high pressure cleaners incorporating a steam stage (with specified limits for capacity and pressure)
  • Machines may use various power systems, including electric, battery, internal combustion, hydraulic, and pneumatic motors

• Safety Requirements

  • Protection against electric shock, mechanical risks, and hazards due to pressure and steam
  • Requirements for design, construction, and performance to minimize risk during normal and abnormal operation
  • Marking and instruction mandates for safe use and maintenance

• Exclusions

  • Machines exceeding 35 MPa pressure
  • Domestic-use liquid or steam cleaners (addressed by IEC 60335-2-54)
  • Hand-held and motor-operated electric tools (IEC 60745 series, etc.)
  • Medical appliances, agricultural sprayers, abrasive cleaners, machines for production processes, and those for explosive or corrosive environments

• Testing and Verification

  • Prescribes tests for electrical, mechanical, thermal, and operational safety
  • Addresses resistance to moisture, rusting, heat, and fire
  • Includes durability requirements for backflow preventers and emission control (acoustic noise, vibration)

Applications

High pressure cleaners and steam cleaners covered under prEN IEC 60335-2-79:2026 are widely used in various settings, ensuring cleanliness and hygiene while maintaining operator safety:

• Commercial Cleaning Contractors: For cleaning in offices, hotels, public buildings, hospitals, and other commercial premises
• Industrial and Light Industrial Environments: Used for machinery, floor, and equipment cleaning where high pressure or steam is required
• Household Use: Suitable for residential outdoor cleaning tasks where the pressure range complies with this standard
• Facilities Management: Assists professionals responsible for optimal maintenance of premises

Compliance with this safety standard helps manufacturers meet market regulations, facilitates CE marking, and assures end-users of product reliability and safety.

Related Standards

For comprehensive safety and regulatory compliance, the following related standards should be consulted in conjunction with prEN IEC 60335-2-79:2026:

• EN IEC 60335-1: General requirements for safety of household and similar electrical appliances
• IEC 60335-2-54: Particular requirements for surface-cleaning appliances for household use employing liquids or steam (domestic use)
• EN 1829-1: High pressure water jet machines over 35 MPa
• IEC 60745, IEC 61029, IEC 62841 Series: Safety of hand-held and transportable motor-operated electric tools
• IEC 60601: Medical electrical equipment
• ISO 4254-6: Agricultural sprayers
• IEC 60364-1: Low-voltage electrical installations

By adhering to prEN IEC 60335-2-79:2026, manufacturers not only ensure compliance with European health and safety legislation but also support product acceptance in global markets committed to user protection and operational reliability.

SLOVENSKI STANDARD
01-november-2026
Gospodinjski in podobni električni aparati - Varnost - 2-79. del: Posebne zahteve
za visokotlačne in parne čistilnike
Household and similar electrical appliances - Safety - Part 2-79: Particular requirements
for high pressure cleaners and steam cleaners
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-79:
Besondere Anforderungen für Hochdruckreiniger und Dampfreiniger
Appareils électrodomestiques et analogues - Sécurité - Partie 2-79: Exigences
particulières pour les appareils de nettoyage à haute pression et les appareils de
nettoyage à vapeur
Ta slovenski standard je istoveten z: prEN IEC 60335-2-79:2026
ICS:
97.080 Aparati za čiščenje Cleaning appliances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
prEN IEC 60335-2-79
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2026
ICS 97.080 Will supersede EN 60335-2-79:2012
English Version
Household and similar electrical appliances - Safety - Part 2-79:
Particular requirements for high pressure cleaners and steam
cleaners
(IEC 60335-2-79:2021)
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-79: Exigences particulières pour les appareils de ähnliche Zwecke - Teil 2-79: Besondere Anforderungen für
nettoyage à haute pression et les appareils de nettoyage à Hochdruckreiniger und Dampfreiniger
vapeur (IEC 60335-2-79:2021)
(IEC 60335-2-79:2021)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2026-11-27.

The text of this draft consists of the text of IEC 60335-2-79:2021.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 82796 Ref. No. prEN IEC 60335-2-79:2026 E

European foreword
This document (prEN IEC 60335-2-79:2026) consists of the text of document IEC 60335-2-79:2021,
prepared by IEC/TC 61 "Safety of household and similar electrical appliances".
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this document (doa) dav + 6 months
has to be announced at national level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) dav + 36 months
conflicting with this document have to be withdrawn (to be confirmed or
modified when voting)
This document will supersede EN 60335-2-79:2012 and all of its amendments and corrigenda (if any).
This document is read in conjunction with prEN IEC 60335-2-79:2026/prAA:2026.

IEC 60335-2-79 ®
Edition 5.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –

Part 2-79: Particular requirements for high pressure cleaners and steam

cleaners
Appareils électrodomestiques et analogues – Sécurité –

Partie 2-79: Exigences particulières pour les appareils de nettoyage à haute

pression et les appareils de nettoyage à vapeur

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.080 ISBN 978-2-8322-9933-3

– 2 – IEC 60335-2-79:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 General requirement . 12
5 General conditions for the tests . 12
6 Classification . 13
7 Marking and instructions . 14
8 Protection against access to live parts . 20
9 Starting of motor-operated appliances . 20
10 Power input and current . 20
11 Heating . 20
12 Charging of metal-ion batteries . 21
13 Leakage current and electric strength at operating temperature . 21
14 Transient overvoltages . 21
15 Moisture resistance . 21
16 Leakage current and electric strength . 23
17 Overload protection of transformers and associated circuits . 24
18 Endurance . 24
19 Abnormal operation . 25
20 Stability and mechanical hazards . 27
21 Mechanical strength . 28
22 Construction . 30
23 Internal wiring . 34
24 Components . 34
25 Supply connection and external flexible cords . 35
26 Terminals for external conductors . 36
27 Provision for earthing . 36
28 Screws and connections . 36
29 Clearances, creepage distances and solid insulation . 36
30 Resistance to heat and fire . 36
31 Resistance to rusting . 36
32 Radiation, toxicity and similar hazards . 36
Annexes . 40
Annex B (normative) . 41
Annex AA (normative) Requirements to avoid backsiphonage . 42
Annex BB (normative) Analysis method for determining the necessary safety device to
prevent backsiphonage . 48
Annex CC (informative) Emission of acoustical noise . 51
Annex DD (informative) Emission of vibration . 53

IEC 60335-2-79:2021 © IEC 2021 – 3 –
Annex EE (informative) Model test report for vibration emission at handles of high-
pressure cleaners . 64
Bibliography . 66
Index of defined terms . 67

Figure 101 – Warning symbol. 37
Figure 102 – Impact test apparatus . 38
Figure 103 – Reactions on handle . 38
Figure 104 – Warning symbol: Machine not suitable for connection to the potable

water mains . 39
Figure 105 – Warning symbol: Do not inhale fumes . 39
Figure AA.1 – Arrangement for the durability test on backflow preventers with reduced
pressure zone . 47
Figure BB.1 – Example for an air break to drain . 50
Figure DD.1 – Trigger gun . 53
Figure DD.2 – Trigger gun with additional side handle . 54
Figure DD.3 – Measurement locations: Trigger gun, main and secondary measuring
point . 56
Figure DD.4 – Measurement locations: Trigger gun with additional side handle, main

and secondary measuring point . 57
Figure DD.5 – Operating conditions – Position of spraying device . 59

Table 101 – Degree of protection against harmful ingress of water . 13
Table 12 – Pull force and torque . 35
Table AA.1 – Nominal size versus durability test flow rate . 46
Table BB.1 – Matrix of the safety devices appropriate to fluid categories . 49
Table DD.1 – Description and units of the symbols used . 55
Table EE.1 – General information and reported results . 64
Table EE.2 – Measurement results for one machine . 65

– 4 – IEC 60335-2-79:2021 © IEC 2021
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 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.
International Standard IEC 60335-2-79 has been prepared by subcommittee 61J: Electrical
motor-operated cleaning appliances for commercial use, of IEC technical committee 61:
Safety of household and similar electrical appliances. It is an International Standard.
This fifth edition cancels and replaces the fourth edition published in 2016. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition (minor changes are not listed):
– editorial and technical alignment with IEC 60335-1:2020;
– clarification on hand-held and battery-operated high pressure cleaners;
– general editorial improvements.

IEC 60335-2-79:2021 © IEC 2021 – 5 –
The text of this International Standard is based on the following documents:
Draft Report on voting
61J/739/CDV 61J/746A/RVC
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.
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 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 high pressure
cleaners and steam cleaners.
When a particular sub clause of Part 1 is not mentioned in this part 2, that sub clause 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 sub clause 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.
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.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety can be found on the IEC website.

– 6 – IEC 60335-2-79:2021 © IEC 2021
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
IEC 60335-2-79:2021 © IEC 2021 – 7 –
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 and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
– 8 – IEC 60335-2-79:2021 © IEC 2021
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 part of IEC 60335 deals with the safety of high-pressure cleaners without traction drive,
intended for household and commercial indoor or outdoor use, having a rated pressure not
less than 2,5 MPa and not exceeding 35 MPa.
It also applies to steam cleaners and those parts of hot water high pressure cleaners
incorporating a steam stage which have a capacity not exceeding 100 l, a rated pressure not
exceeding 2,5 MPa and a product of capacity and rated pressure not exceeding 5 MPa·l.
They are not equipped with a traction drive. The following power systems of the drive for the
high pressure pump are covered:
– mains powered motors up to a rated voltage of 250 V for single-phase machines and
480 V for other machines,
– battery-operated motors,
– internal combustion engines,
– hydraulic or pneumatic motors.
This standard does not apply to
– high pressure water jet machines having a rated pressure exceeding 35 MPa;
NOTE 101 In Europe, those machines are covered by EN 1829-1.
– liquid or steam cleaners intended for domestic use (IEC 60335-2-54);
– hand-held and transportable motor-operated electric tools (IEC 60745 series, IEC 61029
series, IEC 62841 series);
– appliances for medical purposes (IEC 60601);
– agricultural sprayers (ISO 4254-6);
– non-liquid, solid abrasive cleaners;
– machines designed to be part of a production process;
– machines designed for use in corrosive or explosive environments (dust, vapour or gas);
– machines designed for use in vehicles or on board of ships or aircraft.
NOTE 102 Attention is drawn to the fact that in many countries additional requirements on the safe use of the
equipment covered can be specified by the national health authorities, the national authorities responsible for the
protection of labour, the national water supply authorities and similar authorities.
2 Normative references
This clause of Part 1 is applicable except as follows.

IEC 60335-2-79:2021 © IEC 2021 – 9 –
Addition:
IEC 60364-1, Low-voltage electrical installations – Part 1: Fundamental principles,
assessment of general characteristics, definitions
IEC 61558-2-3, Safety of transformers, reactors, power supply units and combinations thereof
– Part 2-3: Particular requirements and tests for ignition transformers for gas and oil burners
Replacement:
IEC 61770:2008, Electric appliances connected to the water mains – Avoidance of
backsiphonage and failure of hose-sets
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Addition:
normal operation
conditions under which the machine is operated in normal use
It denotes the operation at rated flow and rated pressure with the appropriate nozzle and
hose line fitted, all strainers and filters in a clean operating condition and the unloader valve
set to the rated pressure. The water heater, if fitted, is operated at maximum power. Electric
motor driven machines are supplied at rated voltage.
The burner is operated at rated power. Machines designed for operation at more than one
rated power setting are additionally tested at the most disadvantageous power.
On machines designed for use with a flue pipe, a section of flue pipe is attached to the
machine. Flue gas determinations are taken in this flue pipe.
The draught is adjusted as recommended in the instructions.
3.1.12 Addition:
Functions not controlling the starting and stopping of the high pressure jet exiting the nozzle
are not regarded as remote operation. Functions for other purposes e.g. detergent or water
flow control are not considered to be remote operation.
3.5.2 Addition:
NOTE 101 to entry: High pressure cleaners are regarded as hand-held, if the motor/pump unit and the trigger
gun/spray lance/nozzle element form a single unit while in operation and being held by hand. High pressure
cleaners where the motor/pump unit and the trigger gun are separated and connected to each other through a
high pressure hose line are not regarded as hand-held.
3.101
unloader valve
pressure operated device which, when the pump pressure exceeds a preset value, releases
the pressure and leads the excess fluid into 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 device which, when the pump or steam cleaner pressure exceeds a preset
value, releases the pressure and which may return the excess fluid or steam either to the inlet
system or into the atmosphere
– 10 – IEC 60335-2-79:2021 © IEC 2021
3.103
rated pressure
maximum working pressure at the pressure generator during normal operation
3.104
allowable pressure
maximum pressure up to which a machine and/or parts of the machine may be subjected
without impairing its safety
3.105
rated flow
maximum flow at rated pressure at the nozzle during normal operation
3.106
maximum flow rate
highest possible flow rate at the nozzle
Note 1 to entry: Typically, the maximum flow rate occurs at working pressures lower than rated pressure and
with a nozzle designed for spraying of cleaning agents.
3.107
rated temperature
maximum temperature of the cleaning agent during normal operation
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
trigger gun
hand-held spraying device where the flow of the cleaning agent is regulated by an integrated
manually operated control device
3.111
pencil jet nozzle
nozzle that gives a concentrated, parallel water jet
Note 1 to entry: Pencil jet nozzles are also known as needle jet nozzles, solid jet nozzles or zero degree jet
nozzles.
3.112
water jetter
pipe-cleaning device, connected to and controlled by a trigger gun, consisting of a high
pressure hose and a cleaning head with nozzles
3.113
cleaning agent
water with or without the addition of gaseous, soluble or miscible detergent or solid abrasive
3.114
water heater
device for heating the cleaning agent by means of electricity, gas, liquid fuel or heat
exchange
IEC 60335-2-79:2021 © IEC 2021 – 11 –
3.115
continuous ignition
ignition of an oil or gas fired burner that is continuously maintained throughout the time the
burner is operational, whether the burner is firing or not
3.116
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 1 to entry: Primary safety controls are also known as flame failure devices or flame safety controls.
3.117
motorized cleaning head
hand-held or hand-guided cleaning device connected to the machine, with an integrated
electrical motor
3.118
low pressure accessory
device, connected to and controlled by a trigger gun, with large nozzle openings generating a
pressure below rated pressure
Note 1 to entry: Typical examples of low pressure accessories are washing brushes, foam nozzles, washing
sponges.
3.119
hand-guided machine
machine that needs to be moved on the floor
3.120
hose line
assembly of high pressure hoses mounted with appropriate fittings
3.121
guard
part of the machine specifically designed to provide protection by means of a physical barrier,
such as a casing, a shield, a cover, a screen, a door, an enclosure or a fence; other parts of
the machine that fulfil a primarily operational function, for example, the frame of the machine,
may also fulfil a protective function but are not referred to as guards
Note 1 to entry: Three main kinds of guards can be distinguished: fixed guards, interlocking moveable guards
and adjustable guards. Interlocking movable guards are required where frequent access is envisaged, while fixed
guards can be used where frequent access is not envisaged.
3.122
operator
person installing, operating, adjusting, cleaning, moving, or performing user maintenance on
the machine
3.123
test solution
a solution which 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
Note 1 to entry: The chemical designation of dodecyl sodium sulphate is C H NaSO .
12 25 4
3.124
reaction force
force which reacts on the spraying device (and thereby on the operator) as a result of the
action force by the water jet leaving the nozzle

– 12 – IEC 60335-2-79:2021 © IEC 2021
Note 1 to entry: The reaction force can also be called recoil force. For other standards with regard to hand-arm-
vibration, the technical term is feed force (e.g. ISO 28927 series) or push force (e.g. ISO 15230) what describes
another force. For high-pressure cleaners, the reaction force is the relevant physical dimension.
3.125
commercial use
intended use of machines covered by this standard, i.e. not intended for normal housekeeping
purposes by private persons but which may be a source of danger to the public
I.e. in particular that
– the machines may be used by cleaning contractors, cleaning staff, etc.;
– they are used in commercial or public premises (i.e. offices, shops, hotels, hospitals,
schools, etc.) or in industrial (plants, etc.) and light industrial (workshops, etc.)
environments.
Note 1 to entry: Commercial use is also called professional use.
3.126
typical operational mass
mass of the most usual configuration of a machine ready for use including the following, if
applicable:
– hose,
– spraying device (lance and gun),
– standard nozzle,
– fuel tank filled to max level, and
– tank for descaling filled to max level,
excluding the following:
– any contents of the hydraulic system (supply- and high pressure hoses, pump, tank for
cleaning agent),
– any accessory, not required for normal operation (e.g., additional nozzles, foam bottle),
and
– supply cord with plug
NOTE 1 to entry: typical operational mass is also known as ToM
4 General requirement
This clause of Part 1 is applicable except as follows.
Replacement of the first paragraph by the following:
Machines shall be constructed so that they function safely so as to cause no danger to
persons or surroundings during normal use, even in the event of carelessness, and during
installation, adjusting, maintenance, cleaning, repairing or transportation.
Addition:
For the purposes of this standard, the term ‘appliance’ as used in Part 1 is to be read as
‘machine’.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.

IEC 60335-2-79:2021 © IEC 2021 – 13 –
5.101 The test solution shall be stored in a sealed container, in an ambient between 3 °C
and 8 °C and used within seven days after its preparation.
5.102 Protective devices and safety valves shall remain fully functional but shall not
operate under normal operation.
5.103  If a requirement is based upon the mass of the appliance, the typical operational
mass shall be applied.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Machines shall be one of the following classes with respect to the protection against electric
shock:
– class I,
– class II, or
– class III.
However, hand-held appliances and hand-held parts containing electrical components 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 machines shall have a degree of protection against harmful ingress of water according to
Table 101:
Table 101 – Degree of protection against harmful ingress of water
Protection class Protection degree
(electric shock) (IEC 60529)
I-II IPX4
For indoor use only
III IPX3
Steam cleaners For outdoor use I-II-III IPX5
II IPX7
Hand-held parts
III IPX3
Hand-held appliances II-III IPX7
High pressure
Other types of machines I-II-III IPX5
cleaners
Hand-held parts II-III IPX7
However, fixed appliances that are specified for installation in a separate 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.

– 14 – IEC 60335-2-79:2021 © IEC 2021
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Modification:
Replace the fourth dashed item as follows:
– the business name and address of the manufacturer and, if applicable, his authorized
representative; any address shall be sufficient to ensure postal contact;
Addition:
Machines shall be marked in addition with the following:
– serial number, if any;
– designation of the machine and series or type, allowing the technical identification of the
product. This may be achieved by a combination of letters and/or numbers;
NOTE 101 Designation of machine, series or type includes the model or type reference as required in Part 1.
NOTE 102 Prefixes for pressure values according ISO 80000-1, such as MPa, are allowed.
– year of construction, i.e. the year in which the manufacturing process is completed;
– rated pressure in pascals;
– allowable pressure in pascals;
– rated flow in litres per minute;
– maximum flow rate in litres per minute, if necessary. The number of flow rate markings is
limited to two;
– maximum rated temperature where this is above 50 °C;
– maximum power of the water heater in kW, if applicable (for electric heaters, the input
power, for gas-fired or oil-fired heaters the output power).
Machines equipped with wheels and other mobile machinery shall be marked with the ToM in
kg.
A yellow label with black lines showing the substance of the warning symbols in accordance
with Figure 101 shall be permanently fixed to the machine.
Machines shall be marked in addition with the following, if applicable:
– 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.
The height of the lettering shall be not less than 4 mm. This wording may be replaced by
symbol IEC 60417-5041 (2002-10).
– Steam cleaners shall be marked with symbol IEC 60417-5597 (2014-06).
– Machines not intended to be connected to the potable water mains shall be marked with
the symbol according to Figure 104 , coloured as shown or in monochrome colour.
– Machines intended to be used indoors and 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.
7.1.101 All high pressure hoses shall be marked with the following:
– with a pressure of at least the allowable pressure in pascals;

IEC 60335-2-79:2021 © IEC 2021 – 15 –
NOTE Prefixes for pressure values according ISO 80000-1, such as MPa, are allowed.
– maximum temperature in degrees Celsius;
– business name of the manufacturer of the hose and the date of production. These data
may be coded.
Compliance is checked by inspection.
7.1.102 All high pressure accessories (e.g. trigger gun, spray lance) shall be marked with
the following:
– a pressure of at least the allowable pressure in pascals;
NOTE Prefixes for pressure values according ISO 80000-1, such as MPa, are allowed.
– maximum temperature in degrees Celsius.
Compliance is checked by inspection.
7.1.103 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;
– year of construction, i.e. the year in which the manufacturing process is completed;
– mass of the most usual configuration in kg.
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 (2012-09).
NOTE This symbol is an information sign and, except for the colours, the rules of ISO 3864-1 apply.
Compliance is checked by inspection.
7.6 Addition:
[symbol IEC 60417-5597               steam, low jet
(2014-06)]
[symbol IEC 60417-5041               caution, hot surface
(2002-10)]
– 16 – IEC 60335-2-79:2021 © IEC 2021
7.12 Modification:
Replace the fourth paragraph by the following text.
This machine is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge.
Addition:
The front cover of the instructions shall include the substance of the following warning:
CAUTION Read the instructions before using the machine.
This wording may be replaced by symbols ISO 7000-0434A (2004-01) and ISO 7000-0790
(2004-01).
The instructions shall contain at least the following:
– the business name and full address of the manufacturer and, if applicable, his authorized
representative;
– designation of the machine and series or type, except for the serial number, allowing the
technical identification of the product. This may be achieved by a combination of letters
and/or numbers;
NOTE 101 The designation of series or type can be abstracted, as long as the identification of the product is
ensured.
– the general description of the machine;
– the intended use of the machine and the auxiliary equipment as covered by the scope of
this standard;
NOTE 102 Examples of auxiliary equipment are such as, but not limited to, lights and powered brushes as
required by this standard.
NOTE 103 Alternative requirements for instructions in hard copy form are available in 7.12.9.
– the meaning of the symbols used on the machine and in the instructions as required by
this standard;
– drawings, diagrams, descriptions and explanations necessary for the safe use,
maintenance and repair of the machine and for checking its correct functioning;
– information regarding putting into service, safe operation, handling, transportation, and
storage of the machine taking into account its mass;
– instructions to enable adjustment and maintenance to be carried out safely, including the
protective measures that should be taken during these operations;
– the conditions in which the machine meets the requirement of stability during use,
transportation, assembly, dismantling when out of service, testing or foreseeable
breakdowns;
– the procedure to be followed to prevent unsafe situations in the event of accident (e.g.
contact with or spillage of detergents, battery acid, fu
...