IEC 60335-2-79:2021

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

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

cleaners
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.080 ISBN 978-2-8322-9947-0

– 2 – IEC 60335-2-79:2021 RLV © 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 . 13
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 . 21
12 Void Charging of metal-ion batteries . 22
13 Leakage current and electric strength at operating temperature . 22
14 Transient overvoltages . 22
15 Moisture resistance . 22
16 Leakage current and electric strength . 24
17 Overload protection of transformers and associated circuits . 24
18 Endurance . 24
19 Abnormal operation . 25
20 Stability and mechanical hazards . 28
21 Mechanical strength . 29
22 Construction . 30
23 Internal wiring . 35
24 Components . 35
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 . 37
31 Resistance to rusting . 37
32 Radiation, toxicity and similar hazards . 37
Annexes . 40
Annex B (normative) Appliances powered by rechargeable batteries that are
recharged in the appliance .
Annex B (normative) attery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances . 42
Annex S (normative) Battery-operated appliances powered by batteries that are non-
rechargeable or not recharged in the appliance .
Annex AA (normative) Requirements to avoid backsiphonage . 44

Annex BB (normative) Analysis method for determining the necessary safety device to
prevent backsiphonage . 50
Annex CC (informative) Emission of acoustical noise . 53
Annex DD (informative) Emission of vibration . 55
Annex EE (informative) Model test report for vibration emission at handles of high-

pressure cleaners . 66
Bibliography . 68
Index of defined terms . 69

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 . 49
Figure BB.1 – Example for an air break to drain . 52
Figure DD.1 – Trigger gun . 55
Figure DD.2 – Trigger gun with additional side handle . 56
Figure DD.3 – Measurement locations: Trigger gun, main and secondary measuring

point . 58
Figure DD.4 – Measurement locations: Trigger gun with additional side handle, main
and secondary measuring point . 59
Figure DD.5 – Operating conditions – Position of spraying device . 61

Table 101 – Degree of protection against harmful ingress of water . 14
Table 12 – Pull force and torque . 36
Table AA.1 – Nominal size versus durability test flow rate . 48
Table BB.1 – Matrix of the safety devices appropriate to fluid categories . 51
Table DD.1 – Description and units of the symbols used . 57
Table EE.1 – General information and reported results . 66
Table EE.2 – Measurement results for one machine . 67

– 4 – IEC 60335-2-79:2021 RLV © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-79: Particular requirements
for high pressure cleaners and steam cleaners

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