IEC 60335-2-108:2024
(Main)Household and similar electrical appliances - Safety - Part 2-108: Particular requirements for electrolysers
Household and similar electrical appliances - Safety - Part 2-108: Particular requirements for electrolysers
IEC 60335-2-108:2024 deals with the safety of electrolysers that produce low viscosity, ionized liquids intended for use as detergent free wash water in appliances for household and similar purposes and which conform with the standards applicable to such appliances. It applies to electrolysers tested separately, under the most severe conditions that can be expected to occur in normal use, their rated voltage being not more than 250 V including direct current (DC) supplied appliances and battery-operated appliances.
Examples of appliances that can contain electrolysers are:
- dishwashers (IEC 60335-2-5);
- washing machines (IEC 60335-2-7);
- appliances producing wash water for hygiene purposes.
This standard does not supersede the requirements of standards relevant to the particular appliance in which the electrolyser is used. However, if the electrolyser used complies with this standard, the tests for the electrolyser specified in the particular appliance standard can be unnecessary in the particular appliance or assembly. If the electrolyser control system is associated with the particular appliance control system, additional tests can be necessary on the final appliance. Guidance for additional requirements to be considered for inclusion in the end product standards for appliances that use electrolysers is given in informative Annex BB.
Attention is drawn to the fact that:
- for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements can be necessary;
- in many countries, additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities.
This standard does not apply to
- appliances intended exclusively for industrial purposes;
- appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 22.012);
c) application of test probe 19 has been introduced (8.1.1, 20.2, B22.3, B22.4);
d) addition of external accessible surface temperatures (Clause 11).
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1:2020 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
Appareils électrodomestiques et analogues - Sécurité - Partie 2-108: Règles particulières pour les électrolyseurs
L’IEC 60335-2-108:2024 traite de la sécurité des électrolyseurs qui produisent des liquides ionisés à faible viscosité destinés à être utilisés comme eau de lavage sans détergent dans les appareils à usages domestiques et analogues et qui sont conformes aux normes applicables à de tels appareils. Elle s’applique aux électrolyseurs soumis aux essais séparément, dans les conditions les plus sévères qui peuvent se produire en utilisation normale, et dont la tension assignée est inférieure ou égale à 250 V, y compris les appareils alimentés en courant continu et les appareils alimentés par batteries.
Exemples d’appareils qui peuvent contenir des électrolyseurs:
- les lave-vaisselle (IEC 60335-2-5);
- les machines à laver le linge (IEC 60335-2-7);
- les appareils produisant de l’eau de lavage à caractère hygiénique.
La présente norme ne remplace pas les exigences des normes applicables aux appareils particuliers qui utilisent un électrolyseur. Toutefois, si l’électrolyseur utilisé est conforme à la présente norme, les essais spécifiés pour l’électrolyseur dans la norme de l’appareil particulier peuvent ne pas être nécessaires s’il est intégré dans l’appareil particulier ou fait partie d’un assemblage. Si le dispositif de commande de l’électrolyseur est associé au dispositif de commande de l’appareil particulier, des essais supplémentaires peuvent être nécessaires sur l’appareil final. Des recommandations pour les exigences supplémentaires à prendre en considération pour être rajoutées dans les normes de produit fini des appareils utilisant des électrolyseurs sont données à l’Annexe BB informative.
L’attention est attirée sur le fait que:
- pour les appareils destinés à être utilisés dans des véhicules ou à bord de navires ou d'aéronefs, des exigences supplémentaires peuvent être nécessaires;
- dans de nombreux pays, des exigences supplémentaires sont spécifiées par les organismes nationaux de la santé, par les organismes nationaux responsables de la protection des travailleurs, par les organismes nationaux responsables de l'alimentation en eau et par des organismes similaires.
La présente norme ne s'applique pas:
- aux appareils prévus exclusivement pour des usages industriels;
- aux appareils destinés à être utilisés dans des locaux qui présentent des conditions particulières, telles que la présence d'une atmosphère corrosive ou explosive (poussière, vapeur ou gaz).
Cette deuxième édition annule et remplace la première édition parue en 2008. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) le texte a été aligné sur l'IEC 60335-1:2020;
b) certaines notes ont été converties en texte normatif (Article 1, 22.012);
c) introduction de l’application du calibre d’essai 19 (8.1.1, 20.2, B22.3, B22.4);
d) ajout d’exigences relatives aux températures des surfaces accessibles extérieures (Article 11).
La présente partie 2 doit être utilisée conjointement avec la dernière édition de l'IEC 60335-1:2020 et ses amendements sauf si cette édition l'exclut; dans ce cas, la dernière édition qui n'exclut pas la présente partie 2 est utilisée. Elle a été établie sur la base de la sixième édition (2020) de cette norme.
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IEC 60335-2-108 ®
Edition 2.0 2024-03
REDLINE VERSION
INTERNATIONAL
STANDARD
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Household and similar electrical appliances – Safety –
Part 2-108: Particular requirements for electrolysers
IEC 6 60335-2-108:2024-03 RLV(en)
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IEC 60335-2-108 ®
Edition 2.0 2024-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-108: Particular requirements for electrolysers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120; 97.060 ISBN 978-2-8322-8627-2
– 2 – IEC 60335-2-108:2024 RLV © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 10
4 General requirement . 10
5 General conditions for the tests . 10
6 Classification . 11
7 Marking and instructions . 11
8 Protection against access to live parts . 11
9 Starting of motor-operated appliances . 12
10 Power input and current . 12
11 Heating . 12
12 Void Charging of metal-ion batteries . 13
13 Leakage current and electric strength at operating temperature . 13
14 Transient overvoltages . 13
15 Moisture resistance . 13
16 Leakage current and electric strength . 13
17 Overload protection of transformers and associated circuits . 14
18 Endurance . 14
19 Abnormal operation . 14
20 Stability and mechanical hazards . 14
21 Mechanical strength . 14
22 Construction . 14
23 Internal wiring . 16
24 Components . 16
25 Supply connection and external flexible cords . 16
26 Terminals for external conductors . 16
27 Provision for earthing . 16
28 Screws and connections . 16
29 Clearances, creepage distances and solid insulation . 16
30 Resistance to heat and fire . 16
31 Resistance to rusting . 16
32 Radiation, toxicity and similar hazards . 17
Annexes . 18
Annex B (normative) Battery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances . 19
Annex AA (normative) Ageing test for elastomeric parts . 20
Annex BB (informative) Guidance for additional requirements to be considered for
inclusion in the end product standards for appliances that incorporate electrolysers . 22
Bibliography . 23
Figure 101 – Probe for measuring surface temperatures . 17
Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 13
– 4 – IEC 60335-2-108:2024 RLV © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-108: Particular requirements for electrolysers
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60335-2-108:2008. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
IEC 60335-2-108 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This second edition cancels and replaces the first edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 22.012);
c) application of test probe 19 has been introduced (8.1.1, 20.2, B22.3, B22.4);
d) addition of external accessible surface temperatures (Clause 11).
The text of this International Standard is based on the following documents:
Draft Report on voting
61/6955/CDV 61/7056A/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/publications.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
NOTE 1 When "Part 1" is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert
that publication into the IEC standard: Particular requirements for electrolysers.
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.
– 6 – IEC 60335-2-108:2024 RLV © IEC 2024
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 can need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this standard be adopted for implementation nationally
not earlier than 12 months from the date of its publication.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules may can differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with in
Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards Horizontal publications, basic safety publications and group safety
publications covering a hazard are not applicable since they have been taken into consideration when developing
the general and particular requirements for the IEC 60335 series of standards. For example, in the case of
temperature requirements for surfaces on many appliances, generic standards, such as ISO 13732-1 for hot surfaces,
are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of the
requirements and, if found to be substantially equivalent, may be considered to comply with the
standard.
For electrolysers, testing in accordance with this standard is an option and cannot be required
as a precondition for testing the complete appliance, for example by reference in Clause 24 of
a part 2 of IEC 60335. Testing of the appliance should may be reduced if an incorporated
electrolyser including its protection system or control system, if any, complies with this
standard.
– 8 – IEC 60335-2-108:2024 RLV © IEC 2024
In particular, the construction detail inspection and testing may be done separately on the
electrolysers, thereby eliminating the need for inspection and testing when the electrolysers
is applied to different appliances.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-108: Particular requirements for electrolysers
1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of electrolysers that produce low viscosity, ionized
liquids intended for use as detergent free wash water in appliances for household and similar
purposes and which conform with the standards applicable to such appliances. It applies to
electrolysers tested separately, under the most severe conditions that may can be expected
to occur in normal use, their rated voltage being not more than 250 V including direct current
(DC) supplied appliances and battery-operated appliances.
NOTE 101 Examples of appliances that may can contain electrolysers are
– dishwashers (IEC 60335-2-5);
– washing machines (IEC 60335-2-7);
– appliances producing wash water for hygiene purposes.
NOTE 102 This standard does not supersede the requirements of standards relevant to the
particular appliance in which the electrolyser is used. However, if the electrolyser used
complies with this standard, the tests for the electrolyser specified in the particular appliance
standard may not need to be made can be unnecessary in the particular appliance or assembly.
If the electrolyser control system is associated with the particular appliance control system,
additional tests may can be necessary on the final appliance. Guidance for additional
requirements to be considered for inclusion in the end product standards for appliances that
use electrolysers is given in informative Annex BB.
NOTE 103 Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional
requirements may can be necessary;
– in many countries, additional requirements are specified by the national health authorities,
the national authorities responsible for the protection of labour, the national water supply
authorities and similar authorities.
NOTE 104 This standard does not apply to
– appliances intended exclusively for industrial purposes;
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).
– 10 – IEC 60335-2-108:2024 RLV © IEC 2024
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60068-2-52, Environmental testing – Part 2: Tests – Test Kb: Salt mist, cyclic (sodium
chloride solution)
IEC 60079-15, Explosive atmospheres – Part 15: Equipment protection by type of protection "n"
IEC 60079-15:2005, Electrical apparatus for explosive gas atmospheres – Part 15:
Construction, test and marking of type of protection, “n” electrical apparatus
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
ISO 1817:20052022, Rubber, vulcanized or thermoplastic– Determination of the effect of liquids
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.9 Replacement Modification:
normal operation
Replace the first paragraph with the following:
operation of the electrolyser under the following conditions:
If the electrolyser is intended to be filled by the user, it is filled with the amount and type of
electrolyte specified in the instructions.
+10
Water is passed through the electrolyser, the temperature of the water being 15 °C °C.
−5
3.5 Definitions relating to types of appliances
3.5.101
electrolyser
device to produce ionized washing water
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.101 Electrolysers are tested as motor-operated appliances.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Modification:
Replace the first paragraph with the following:
Electrolysers shall be of class I, class II or class III. They may be class 0 if their rated
voltage does not exceed 150 V.
6.101 Electrolysers are classified as being
– intended for direct connection of the appliance supply cord to the electrolyser terminals,
or
– not intended for direct connection of the appliance supply cord to the electrolyser
terminals.
NOTE 1 Electrolysers can, in both cases, be delivered with or without the supply cord.
NOTE 2 Electrolysers intended for direct connection of the appliance supply cord to their terminals may can also
be used without the supply cord being connected directly to their terminals.
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 Modification:
The rated power input or rated current need not be marked.
7.5 Not applicable.
7.7 Not applicable.
7.12 Replacement:
The instructions shall contain the quantity and details of the electrolyte to be used and details
of the chemical reactions that occur in the electrolyser.
NOTE Details of the electrolyte used may can be given, for example, in terms of a generic name or a manufacturer's
part number.
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.
8.1.1 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
– 12 – IEC 60335-2-108:2024 RLV © IEC 2024
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 not applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 101 is used to measure the temperature rises of external accessible surfaces
specified in Table 101. The probe is applied with a force of 4 N ± 1 N to the surface in such a
way that the best possible contact between the probe and the surface is ensured. The
measurement is performed after a contact period of 30 s.
The probe may be held in place using a laboratory stand clamp or similar device. Any measuring
instrument giving the same results as the probe may be used.
11.7 Replacement Modification:
Replace the first paragraph with the following:
Electrolysers are operated until steady conditions are established.
11.8 Modification:
Replace the first paragraph with the following:
During the test, the temperature rises are monitored continuously and shall not exceed the
values shown in Table 3 and Table 101.
Table 101 – Maximum temperature rises for specified external accessible
surfaces under normal operating conditions
a
Surface
Temperature rise of external accessible surfaces
K
Surfaces of appliances Surfaces of appliances
situated not more than situated more than
850 mm above the floor 850 mm above the floor
after installation or in after installation or in
normal use normal use
Bare metal 38 42
b
42 49
Coated metal
Glass and ceramic 51 56
c d
58 62
Plastic and plastic coating > 0,4 mm ,
NOTE The temperature rise limits of handles, knobs, grips, keyboards, keypads and similar parts are specified in
Table 3.
a
Temperature rises are not measured on:
– the underside of appliances intended to be used on a working surface or floor, where these surfaces are
inaccessible to a 75 mm diameter probe having a hemispherical end;
– the rear surface of appliances which, according to the instructions, shall be placed against a wall and where
these surfaces are inaccessible to a 75 mm diameter probe having a hemispherical end.
b
Metal is considered coated when a coating having a minimum thickness of 90 µm made of enamel, powder or
non-substantially plastic coating is used.
c
The temperature rise limit of plastic also applies for plastic material having a metal finish of thickness less than
0,1 mm.
d
When the thickness of the plastic coating does not exceed 0,4 mm, the temperature rise limits of coated metal
for underlying metal apply or the temperature rise limits for glass or ceramic material for underlying glass or
ceramic material apply.
12 Void Charging of metal-ion batteries
This clause of Part 1 is applicable.
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable
16 Leakage current and electric strength
This clause of Part 1 is applicable.
– 14 – IEC 60335-2-108:2024 RLV © IEC 2024
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable.
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.2 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
21 Mechanical strength
This clause of Part 1 is applicable.
22 Construction
This clause of Part 1 is applicable except as follows.
22.6 Addition:
Elastomeric parts that withstand the ageing test specified in normative Annex AA are not
considered to be parts where leakage could occur.
Modification:
Instead of coloured water, a coloured solution from the electrolysed wash water is used.
22.101 Electrolysers shall be constructed so that they are always open to the atmosphere
through an aperture of at least 5 mm in diameter, or 20 mm in area with a width of at least
3 mm. The aperture shall be located so that it is unlikely to be obstructed in normal use.
Compliance is checked by inspection and by measurement.
22.102 During normal use of the electrolyser, the chemical reaction in the electrolyser shall
not produce hydrogen gas that is released in hazardous amounts into areas
• where electrical components that produce arcs and sparks during normal operation or
abnormal operation are mounted, unless these components have been tested and found at
least to comply with IEC 60079-15 for group IIC gases; or
• that contain surfaces with a temperature exceeding 460 °C during normal operation or
abnormal operation and that may can be exposed to the released hydrogen gas.
Compliance is checked by inspection, by measuring the temperature of the relevant surfaces
during normal operation and abnormal operation and by the following test.
The electrolyser is operated for one cycle under conditions of normal operation.
The concentration of hydrogen gas in the relevant areas is measured continuously from the
beginning of the test until the end of the cycle. The background hydrogen concentration
measured prior to the test is subtracted from the maximum concentration measured during the
test.
The measured value shall not exceed 50 % of the lower flammability limit (LFL) of hydrogen.
NOTE 1 The LFL of hydrogen gas is 4 %V/V of air.
NOTE 2 The instruments used for monitoring gas concentration, such as those which use
infrared sensing techniques, should have a fast response, typically 2 s to 3 s and should not
unduly influence the result of the test.
NOTE 3 If gas chromatography is to be used, the gas sampling in confined areas should occur
at a rate not exceeding 2 ml every 30 s.
NOTE 42 Other instruments are not precluded from being can be used provided that they do not unduly influence
the results.
22.103 During normal use of the electrolyser, the chemical reaction in the electrolyser shall
not produce wash water that causes corrosion due to the pH value of the wash water.
Compliance is checked by the salt mist test, Kb of IEC 60068-2-52, severity 2 being applicable.
The pH value of the solution used shall be approximately equal to that of the wash water as
measured during normal use of the appliance if the value is greater than that specified in
IEC 60068-2-52.
Before the test, enclosures having a coating are scratched by means of a hardened steel pin,
the end of which has the form of a cone with a top angle of 40°. Its tip is rounded with a radius
of 0,25 mm ± 0,02 mm. The pin is loaded so that the force exerted along its axis is 10 N ± 0,5 N.
The pin is held at an angle of 80° to 85° to the horizontal and scratches are made by drawing
the pin along the surface of the coating at a speed of approximately 20 mm/s. Five scratches
are made at least 5 mm apart and at least 5 mm from the edges.
After the test, the electrolyser shall not have deteriorated to such an extent that compliance
with this standard, in particular with Clause 8 and Clause 27, is impaired. The coating shall not
be broken and shall not have loosened from the surface.
– 16 – IEC 60335-2-108:2024 RLV © IEC 2024
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable.
25 Supply connection and external flexible cords
This clause of Part 1 is applicable.
26 Terminals for external conductors
This clause of Part 1 is applicable.
27 Provision for earthing
This clause of Part 1 is applicable.
28 Screws and connections
This clause of Part 1 is applicable.
29 Clearances, creepage distances and solid insulation
This clause of Part 1 is applicable except as follows.
29.2 Replacement:
The microenvironment is pollution degree 3, and the insulation shall have a CTI not less than
250, unless the insulation is enclosed or located so that it is unlikely to be exposed to pollution
during normal use of the electrolyser due to electrolyte used.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.2.2 Not applicable.
31 Resistance to rusting
This clause of Part 1 is applicable.
32 Radiation, toxicity and similar hazards
This clause of Part 1 is applicable except as follows.
Addition:
The ozone concentration produced by the chemical reactions in the electrolyser shall not be
excessive.
Compliance is checked by the following test, which is carried out in a room without openings
having dimensions of 2,5 m × 3,5 m × 3,0 m, the walls being covered with polyethylene sheet.
The room is maintained at approximately 25 °C and 50 % relative humidity. The electrolyser is
positioned in accordance with the instructions and then operated for one cycle under conditions
of normal operation.
The ozone sampling tube is to be located 10 mm from the gas outlet aperture specified in 22.101.
The background ozone concentration measured prior to the test is subtracted from the maximum
concentration measured during the test.
-6
The percentage of ozone in the room shall not exceed 5 × 10 .
Key
A adhesive
B thermocouple wires 0,3 mm diameter to IEC 60584-1 Type K
C handle arrangement permitting a contact force of 4 N ± 1 N
D polycarbonate tube: inside diameter 3 mm, outside diameter 5 mm
E tinned copper disc: 5 mm diameter, 0,5 mm thick with a flat contact face
Figure 101 – Probe for measuring surface temperatures
– 18 – IEC 60335-2-108:2024 RLV © IEC 2024
Annexes
The annexes of Part 1 are applicable except as follows.
Annex B
(normative)
Battery-operated appliances, separable batteries and
detachable batteries for battery-operated appliances
Annex B of Part 1 Is applicable except as follows.
B.22.3 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
B.22.4 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
– 20 – IEC 60335-2-108:2024 RLV © IEC 2024
Annex AA
(normative)
Ageing test for elastomeric parts
The ageing test on elastomeric parts is carried out by measuring their hardness and mass
before and after immersion in a solution of the electrolysed portion of the wash water at elevated
temperature.
The test is carried out on at least three samples of each part. The samples and test procedure
are as specified in ISO 1817:2022, with the following modifications.
46 Test liquids
The liquid used is the electrolysed portion of the wash water obtained under the conditions of
Clause 11.
The total mass of the test pieces immersed shall not exceed 100 g for each litre of solution.
The test pieces are completely immersed with their entire surface freely exposed to the solution.
During the tests, the test pieces shall not be exposed to direct light. Test pieces of different
compounds shall not be immersed in the same solution at the same time.
57 Test pieces
57.4 Conditioning
The temperature is 23 °C ± 2 °C and the relative humidity is (50 ± 5) %.
68 Immersion in the test liquid
68.1 Temperature
+5
The solution is heated within 1 h with the test pieces immersed, to a temperature of °C
and maintained at this value. The solution is renewed every 24 h and heated in the same way.
NOTE To avoid undue evaporation of the solution, it is recommended to use a closed-circuit system or similar
method for renewing the solution.
68.2 Duration
+1
The test pieces are immersed for a total period of 48 h.
The test pieces are then immediately immersed in a fresh solution that is maintained at ambient
temperature. The pieces are immersed for 45 min ± 15 min.
After having been removed from the solution, the test pieces are rinsed in cold water at
15 °C ± 5 °C and then dried with blotting paper.
79 Procedure
7.29.3 Change in mass
The increase in mass of the test pieces shall not exceed 10 % of the value determined before
immersion.
9.7.6 Change in hardness
The micro-test for hardness applies.
The hardness of the test pieces shall not have changed by more than 8 IRHD. Their surface
shall not have become sticky and shall show no crack visible to the naked eye or any other
deterioration.
– 22 – IEC 60335-2-108:2024 RLV © IEC 2024
Annex BB
(informative)
Guidance for additional requirements to be considered for inclusion in
the end product standards for appliances that incorporate electrolysers
The following list is given as guidance for the detailed information that may can need to be
specified in the end product standards for appliances that incorporate electrolysers:
• instruction to the user to avoid blocking the electrolyser aperture during use;
• application of 22.17 to spacers intended to prevent the electrolyser aperture being blocked
by walls;
• the need to apply 22.102 to the end product to check that hydrogen gas does not accumulate
in the vicinity of critical components;
• the need to apply 22.103 to the end product to check that the electrolysed water does not
cause corrosion of critical parts.
Bibliography
The Bibliography of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-5, Household and similar electrical appliances – Safety – Part 2: Particular
requirements for dishwashers
IEC 60335-2-7, Household and similar electrical appliances – Safety – Part 2: Particular
requirements for washing machines
ISO 13732-1, Ergonomics of the thermal environment – Methods for the assessment of human
responses to contact with surfaces – Part 1: Hot surfaces
___________
IEC 60335-2-108 ®
Edition 2.0 2024-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-108: Particular requirements for electrolysers
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-108: Règles particulières pour les électrolyseurs
– 2 – IEC 60335-2-108:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 10
4 General requirement . 10
5 General conditions for the tests . 10
6 Classification . 11
7 Marking and instructions . 11
8 Protection against access to live parts . 11
9 Starting of motor-operated appliances . 12
10 Power input and current . 12
11 Heating .
...
IEC 60335-2-108 ®
Edition 2.0 2024-03
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60335-2-108:2024 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-108: Particular requirements for electrolysers
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IEC 60335-2-108 ®
Edition 2.0 2024-03
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60335-2-108:2024 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-108: Particular requirements for electrolysers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120; 97.060 ISBN 978-2-8322-8634-0
IEC 60335-1:2020/ISH1:2021 – 1 –
© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 60335-1
Edition 6.0 2020-09
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –
Part 1: General requirements
INTERPRETATION SHEET 1
This interpretation sheet has been prepared by IEC technical committee 61: Safety of
household and similar electrical appliances.
The text of this Interpretation Sheet is based on the following documents:
Draft Report on voting
61/5999/DISH 61/6009/RVDISH
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
___________
INTRODUCTION
Edition 6 of IEC 60335-1:2020 defines and introduces requirements for a detachable
power supply part of an appliance. In the document, 24.2 prohibits the use of a power
supply in a flexible cord.
QUESTION:
Does Subclause 24.2 prohibit the use of a detachable power supply part?
ANSWER
No, a "detachable power supply part" is a defined term and is not captured by the term
"power supply" as used in Subclause 24.2.
NOTE A detachable power supply part is captured by the defined term when the output of the power supply
part is detachable from the class III construction part of the appliance at:
– the power supply part, or
– the class III construction part of the appliance.
However, the supply cord (if any) does not have to be detachable from the detachable power supply part.
ICS 13.120; 97.030
IEC 60335-1:2020-09/ISH1:2021-11(en)
– 2 – IEC 60335-2-108:2024 EXV © IEC 2024
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 16
4 General requirement . 28
5 General conditions for the tests . 28
6 Classification . 32
7 Marking and instructions . 33
8 Protection against access to live parts . 40
9 Starting of motor-operated appliances . 42
10 Power input and current . 42
11 Heating . 42
12 Charging of metal-ion batteries . 49
13 Leakage current and electric strength at operating temperature . 50
14 Transient overvoltages . 53
15 Moisture resistance . 54
16 Leakage current and electric strength . 56
17 Overload protection of transformers and associated circuits . 58
18 Endurance . 59
19 Abnormal operation . 59
20 Stability and mechanical hazards . 69
21 Mechanical strength . 70
22 Construction . 72
23 Internal wiring . 86
24 Components . 88
25 Supply connection and external flexible cords . 92
26 Terminals for external conductors . 101
27 Provision for earthing . 103
28 Screws and connections . 105
29 Clearances, creepage distances and solid insulation . 107
30 Resistance to heat and fire . 115
31 Resistance to rusting . 119
32 Radiation, toxicity and similar hazards . 119
Annex A (informative) Routine tests . 133
Annex B (normative) Battery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances . 135
Annex C (normative) Ageing test on motors . 156
Annex D (normative) Thermal motor protectors . 157
Annex E (normative) Needle-flame test . 158
Annex F (normative) Capacitors . 159
Annex G (normative) Safety isolating transformers . 161
Annex H (normative) Switches . 162
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 164
Annex J (normative) Coated printed circuit boards . 166
Annex K (informative) Overvoltage categories . 167
Annex L (informative) Guidance for the measurement of clearances and creepage
distances . 168
Annex M (informative) Pollution degree . 171
Annex N (normative) Proof tracking test . 172
Annex O (informative) Selection and sequence of the tests of Clause 30 . 173
Annex P (informative) Guidance for the application of this standard to appliances
used in tropical climates . 178
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits . 180
Annex R (normative) Software evaluation . 183
Annex S (informative) Guidance for the application of this standard on measurement
of power input and current based on the requirements of 10.1 and 10.2 concerning the
representative period . 197
Annex T (normative) UV-C radiation effect on non-metallic materials . 198
Annex U (normative) Appliances intended for remote communication through public
networks . 201
Annex AA (normative) Ageing test for elastomeric parts . 203
Annex BB (informative) Guidance for additional requirements to be considered for
inclusion in the end product standards for appliances that incorporate electrolysers . 205
Bibliography . 208
Index of defined terms . 211
Figure 1 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of class II appliances and for parts of class ll construction . 120
Figure 2 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of other than class II appliances or parts of class ll
construction . 121
Figure 3 – Circuit diagram for leakage current measurement at operating temperature
for three-phase with neutral class II appliances and for parts of class ll construction . 122
Figure 4 – Circuit diagram for leakage current measurement at operating temperature
for three-phase with neutral appliances other than those of class II or parts of class ll
construction . 123
Figure 5 – Small part . 124
Figure 6 – Example of an electronic circuit with low-power points . 124
Figure 7 – Test finger nail . 125
Figure 8 – Flexing test apparatus . 126
Figure 9 – Constructions of cord anchorages . 127
Figure 10 – An example of parts of an earthing terminal . 128
Figure 11 – Examples of clearances . 129
Figure 12 – Example of the placement of the cylinder . 130
Figure 13 – Small parts cylinder . 131
Figure 14 – Example of a specified operating region of a lithium-ion cell during
charging . 132
– 4 – IEC 60335-2-108:2024 EXV © IEC 2024
Figure 101 – Probe for measuring surface temperatures . 132
Figure B.1 – Examples of battery-operated appliance constructions and application of
normative Annex B (1 of 2) . 154
Figure B.2 – Examples of correct polarity connection marking representing three
batteries . 155
Figure I.1 – Simulation of faults . 165
Figure L.1 – Sequence for the determination of clearances . 168
Figure L.2 – Sequence for the determination of creepage distances . 169
Figure L.3 – Measurement of clearances . 170
Figure O.1 – Tests for resistance to heat . 173
Figure O.2 – Selection and sequence of tests for resistance to fire in hand-held
appliances . 174
Figure O.3 – Selection and sequence of tests for resistance to fire in attended
appliances . 174
Figure O.4 – Selection and sequence of tests for resistance to fire in unattended
appliances . 175
Figure O.5 – Some applications of the term "within a distance of 3 mm" . 177
Figure Q.1 – Flowchart outlining the sequence of tests for the evaluation of electronic
circuits (1 of 2) . 181
Figure S.1 – Flowchart giving guidance on measurement of power input and current
concerning the representative period . 197
Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 45
Table 3 – Maximum normal temperature rises . 46
Table 4 – Voltage for electric strength test . 52
Table 5 – Characteristics of high-voltage sources . 53
Table 6 – Impulse test voltage . 53
Table 7 – Test voltages. 58
Table 8 – Maximum winding temperature . 61
Table 9 – Maximum abnormal temperature rise . 67
Table 10 – Dimensions of cables and conduits . 94
Table 11 – Minimum cross-sectional area of conductors . 96
Table 12 – Pull force and torque . 98
Table 13 – Nominal cross-sectional area of conductors . 102
Table 14 – Torque for testing screws and nuts . 106
Table 15 – Rated impulse voltage . 108
Table 16 – Minimum clearances . 109
Table 17 – Minimum creepage distances for basic insulation . 112
Table 18 – Minimum creepage distances for functional insulation . 113
Table 19 – Minimum thickness for accessible parts of reinforced insulation consisting
of a single layer . 115
Table A.1 – Test voltages . 134
Table B.1 – Artificial source characteristics . 137
Table B.2 – Total area of openings for metal-ion cells . 145
Table B.3 – Volume of air injected at 2 070 kPa . 145
Table C.1 – Test conditions . 156
Table R.1 – General fault/error conditions . 185
Table R.2 – Specific fault/error conditions . 187
Table R.3 – Semi-formal methods . 193
Table R.4 – Software architecture specification . 193
Table R.5 – Module design specification . 194
Table R.6 – Design and coding standards . 195
Table R.7 – Software safety validation . 195
Table T.1 – Minimum property retention limits after UV-C exposure . 199
Table T.2 – Minimum electric strength for internal wiring after UV-C exposure . 200
Table U.1 – Examples of acceptable measures against unauthorised access and
transmission fault/error modes . 206
– 6 – IEC 60335-2-108:2024 EXV © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-108: Particular requirements for electrolysers
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s).
IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect
thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which may
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not be held responsible for identifying any or all such patent rights.
This extended version (EXV) of the official IEC Standard provides the user with the
comprehensive content of the Standard.
made to IEC 60335-1:2020.
The specific content of IEC 60335-2-108:2024 is displayed on a blue background.
IEC 60335-2-108 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This second edition cancels and replaces the first edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 22.012);
c) application of test probe 19 has been introduced (8.1.1, 20.2, B22.3, B22.4);
d) addition of external accessible surface temperatures (Clause 11).
The text of this International Standard is based on the following documents:
Draft Report on voting
61/6955/CDV 61/7056A/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/publications.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
NOTE 1 When "Part 1" is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert
that publication into the IEC standard: Particular requirements for electrolysers.
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.
– 8 – IEC 60335-2-108:2024 EXV © IEC 2024
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 can need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this standard be adopted for implementation nationally
not earlier than 12 months from the date of its publication.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules can differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with in
Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal publications, basic safety publications and group safety publications covering a hazard are not
applicable since they have been taken into consideration when developing the general and particular requirements
for the IEC 60335 series of standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of the
requirements and, if found to be substantially equivalent, may be considered to comply with the
standard.
For electrolysers, testing in accordance with this standard is an option and cannot be required
as a precondition for testing the complete appliance, for example by reference in Clause 24 of
a part 2 of IEC 60335. Testing of the appliance may be reduced if an incorporated electrolyser
including its protection system or control system, if any, complies with this standard.
In particular, the construction detail inspection and testing may be done separately on the
electrolysers, thereby eliminating the need for inspection and testing when the electrolysers
is applied to different appliances.
– 10 – IEC 60335-2-108:2024 EXV © IEC 2024
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-108: Particular requirements for electrolysers
1 Scope
This part of IEC 60335 deals with the safety of electrolysers that produce low viscosity, ionized
liquids intended for use as detergent free wash water in appliances for household and similar
purposes and which conform with the standards applicable to such appliances. It applies to
electrolysers tested separately, under the most severe conditions that can be expected to
occur in normal use, their rated voltage being not more than 250 V including direct current (DC)
supplied appliances and battery-operated appliances.
Examples of appliances that can contain electrolysers are
– dishwashers (IEC 60335-2-5);
– washing machines (IEC 60335-2-7);
– appliances producing wash water for hygiene purposes.
This standard does not supersede the requirements of standards relevant to the particular
appliance in which the electrolyser is used. However, if the electrolyser used complies with
this standard, the tests for the electrolyser specified in the particular appliance standard can
be unnecessary in the particular appliance or assembly. If the electrolyser control system is
associated with the particular appliance control system, additional tests can be necessary on
the final appliance. Guidance for additional requirements to be considered for inclusion in the
end product standards for appliances that use electrolysers is given in informative Annex BB.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional
requirements can be necessary;
– in many countries, additional requirements are specified by the national health authorities,
the national authorities responsible for the protection of labour, the national water supply
authorities and similar authorities.
This standard does not apply to
– appliances intended exclusively for industrial purposes;
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60034-1, Rotating electrical machines – Part 1: Rating and performance
IEC 60061-1, Lamp caps and holders together with gauges for the control of interchangeability
and safety – Part 1: Lamp caps
– 12 – IEC 60335-2-108:2024 EXV © IEC 2024
IEC 60065:2014, Audio, video and similar electronic apparatus – Safety requirements
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-31, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling shocks,
primarily for equipment-type specimens
IEC 60068-2-52, Environmental testing – Part 2: Tests – Test Kb: Salt mist, cyclic (sodium
chloride solution)
IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state
IEC 60079-15, Explosive atmospheres – Part 15: Equipment protection by type of protection
"n"
IEC TR 60083, Plugs and socket-outlets for domestic and similar general use standardized in
member countries of IEC
IEC 60085:2007, Electrical insulation – Thermal evaluation and designation
IEC 60112:2003, Method for the determination of the proof and the comparative tracking indices
of solid insulating materials
IEC 60112:2003/AMD1:2009
IEC 60127 (all parts), Miniature fuses
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
IEC 60227-5:2011, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 5: Flexible cables (cords)
IEC 60238, Edison screw lampholders
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including 450/750 V
IEC 60252-1:2010, AC motor capacitors – Part 1: General – Performance, testing and rating –
Safety requirements – Guidance for installation and operation
IEC 60252-1:2010/AMD1:2013
IEC 60309-2, Plugs, socket-outlets and couplers for industrial purposes – Part 2: Dimensional
interchangeability requirements for pin and contact-tube accessories
IEC 60320 (all parts), Appliance couplers for household and similar general purposes
IEC 60320-1, Appliance couplers for household and similar general purposes – Part 1: General
requirements
___________
There exists a consolidated edition 4.1:2009 that includes edition 4 and its Amendment 1.
There exists a consolidated edition 2.1:2013 that includes edition 2 and its Amendment 1.
IEC 60320-2-3, Appliance couplers for household and similar general purposes – Part 2-3:
Appliance couplers with a degree of protection higher than IPX0
IEC 60320-3, Appliance couplers for household and similar general purposes – Part 3: Standard
sheets and gauges
IEC 60384-14:2013, Fixed capacitors for use in electronic equipment – Part 14: Sectional
specification – Fixed capacitors for electromagnetic interference suppression and connection
to the supply mains
IEC 60384-14:2013/AMD1:2016
IEC 60417, Graphical symbols for use on equipment
IEC 60445:2017, Basic and safety principles for man-machine interface, marking and
identification – Identification of equipment terminals, conductor terminations and conductors
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
IEC 60598-1:2014, Luminaires – Part 1: General requirements and tests
IEC 60598-1:2014/AMD1:2017
IEC 60603-11, Connectors for frequencies below 3 MHz for use with printed boards – Part 11:
Detail specification for concentric connectors (dimensions for free connectors and fixed
connectors)
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60664-3:2016, Insulation coordination for equipment within low-voltage systems – Part 3:
Use of coating, potting or moulding for protection against pollution
IEC 60664-4:2005, Insulation coordination for equipment within low-voltage systems – Part 4:
Consideration of high-frequency voltage stress
IEC 60691, Thermal-links – Requirements and application guide
IEC 60695-2-11:2014, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (GWEPT)
IEC 60695-2-12, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods – Glow-
wire flammability index (GWFI) test method for materials
IEC 60695-2-13, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods – Glow-
wire ignition temperature (GWIT) test method for materials
___________
There exists a consolidated edition 4.1:2016 that includes edition 4 and its Amendment 1.
There exists a consolidated edition 2.2:2013 that includes edition 2 and its Amendment 1 and Amendment 2.
There exists a consolidated edition 8.1:2017 that includes edition 8 and its Amendment 1.
– 14 – IEC 60335-2-108:2024 EXV © IEC 2024
IEC 60695-10-2, Fire hazard testing – Part 10-2: Abnormal heat – Ball pressure test
IEC 60695-11-5:2016, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method
– Apparatus, confirmatory test arrangement and guidance
IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical
flame test methods
IEC 60730-1:2013, Automatic electrical controls – Part 1: General requirements
IEC 60730-1:2013/AMD1:2015
IEC 60730-2-8:2018, Automatic electrical controls – Part 2-8: Particular requirements for
electrically operated water valves, including mechanical requirements
IEC 60730-2-9:2015, Automatic electrical controls – Part 2-9: Particular requirements for
temperature sensing controls
IEC 60730-2-9:2015/AMD1:2018
IEC 60730-2-10, Automatic electrical controls for household and similar use – Part 2-10:
Particular requirements for motor-starting relays
IEC 60738-1, Thermistors – Directly heated positive temperature coefficient – Part 1: Generic
specification
IEC 60799, Electrical accessories – Cord sets and interconnection cord sets
IEC 60906-1, IEC system of plugs and socket-outlets for household and similar purposes –
Part 1: Plugs and socket-outlets 16 A 250 V a.c.
IEC 60934, Circuit-breakers for equipment (CBE)
IEC 60990:2016, Methods of measurement of touch current and protective conductor current
IEC 60999-1:1999, Connecting devices – Electrical copper conductors – Safety requirements
for screw-type and screwless-type clamping units – Part 1: General requirements and particular
2 2
requirements for clamping units for conductors from 0,2 mm up to 35 mm (included)
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement
techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic com
...
IEC 60335-2-108 ®
Edition 2.0 2024-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-108: Particular requirements for electrolysers
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-108: Règles particulières pour les électrolyseurs
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IEC 60335-2-108 ®
Edition 2.0 2024-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-108: Particular requirements for electrolysers
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-108: Règles particulières pour les électrolyseurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120, 97.060 ISBN 978-2-8322-8460-5
– 2 – IEC 60335-2-108:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 10
4 General requirement . 10
5 General conditions for the tests . 10
6 Classification . 11
7 Marking and instructions . 11
8 Protection against access to live parts . 11
9 Starting of motor-operated appliances . 12
10 Power input and current . 12
11 Heating . 12
12 Charging of metal-ion batteries . 13
13 Leakage current and electric strength at operating temperature . 13
14 Transient overvoltages . 13
15 Moisture resistance . 13
16 Leakage current and electric strength . 13
17 Overload protection of transformers and associated circuits . 14
18 Endurance . 14
19 Abnormal operation . 14
20 Stability and mechanical hazards . 14
21 Mechanical strength . 14
22 Construction . 14
23 Internal wiring . 16
24 Components . 16
25 Supply connection and external flexible cords . 16
26 Terminals for external conductors . 16
27 Provision for earthing . 16
28 Screws and connections . 16
29 Clearances, creepage distances and solid insulation . 16
30 Resistance to heat and fire . 16
31 Resistance to rusting . 16
32 Radiation, toxicity and similar hazards . 17
Annexes . 18
Annex B (normative) Battery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances . 19
Annex AA (normative) Ageing test for elastomeric parts . 20
Annex BB (informative) Guidance for additional requirements to be considered for
inclusion in the end product standards for appliances that incorporate electrolysers . 22
Bibliography . 23
Figure 101 – Probe for measuring surface temperatures . 17
Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 13
– 4 – IEC 60335-2-108:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-108: Particular requirements for electrolysers
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60335-2-108 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This second edition cancels and replaces the first edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 22.012);
c) application of test probe 19 has been introduced (8.1.1, 20.2, B22.3, B22.4);
d) addition of external accessible surface temperatures (Clause 11).
The text of this International Standard is based on the following documents:
Draft Report on voting
61/6955/CDV 61/7056A/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/publications.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
NOTE 1 When "Part 1" is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert
that publication into the IEC standard: Particular requirements for electrolysers.
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.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations can need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this standard be adopted for implementation nationally
not earlier than 12 months from the date of its publication.
– 6 – IEC 60335-2-108:2024 © IEC 2024
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules can differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with in
Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal publications, basic safety publications and group safety publications covering a hazard are not
applicable since they have been taken into consideration when developing the general and particular requirements
for the IEC 60335 series of standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of the
requirements and, if found to be substantially equivalent, may be considered to comply with the
standard.
For electrolysers, testing in accordance with this standard is an option and cannot be required
as a precondition for testing the complete appliance, for example by reference in Clause 24 of
a part 2 of IEC 60335. Testing of the appliance may be reduced if an incorporated electrolyser
including its protection system or control system, if any, complies with this standard.
In particular, the construction detail inspection and testing may be done separately on the
electrolysers, thereby eliminating the need for inspection and testing when the electrolysers
is applied to different appliances.
– 8 – IEC 60335-2-108:2024 © IEC 2024
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-108: Particular requirements for electrolysers
1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of electrolysers that produce low viscosity, ionized
liquids intended for use as detergent free wash water in appliances for household and similar
purposes and which conform with the standards applicable to such appliances. It applies to
electrolysers tested separately, under the most severe conditions that can be expected to
occur in normal use, their rated voltage being not more than 250 V including direct current (DC)
supplied appliances and battery-operated appliances.
Examples of appliances that can contain electrolysers are
– dishwashers (IEC 60335-2-5);
– washing machines (IEC 60335-2-7);
– appliances producing wash water for hygiene purposes.
This standard does not supersede the requirements of standards relevant to the particular
appliance in which the electrolyser is used. However, if the electrolyser used complies with
this standard, the tests for the electrolyser specified in the particular appliance standard can
be unnecessary in the particular appliance or assembly. If the electrolyser control system is
associated with the particular appliance control system, additional tests can be necessary on
the final appliance. Guidance for additional requirements to be considered for inclusion in the
end product standards for appliances that use electrolysers is given in informative Annex BB.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional
requirements can be necessary;
– in many countries, additional requirements are specified by the national health authorities,
the national authorities responsible for the protection of labour, the national water supply
authorities and similar authorities.
This standard does not apply to
– appliances intended exclusively for industrial purposes;
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).
– 10 – IEC 60335-2-108:2024 © IEC 2024
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60068-2-52, Environmental testing – Part 2: Tests – Test Kb: Salt mist, cyclic (sodium
chloride solution)
IEC 60079-15, Explosive atmospheres – Part 15: Equipment protection by type of protection "n"
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
ISO 1817:2022, Rubber, vulcanized or thermoplastic– Determination of the effect of liquids
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.9 Modification:
normal operation
Replace the first paragraph with the following:
operation of the electrolyser under the following conditions:
If the electrolyser is intended to be filled by the user, it is filled with the amount and type of
electrolyte specified in the instructions.
+10
Water is passed through the electrolyser, the temperature of the water being 15 °C °C.
−5
3.5 Definitions relating to types of appliances
3.5.101
electrolyser
device to produce ionized washing water
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.101 Electrolysers are tested as motor-operated appliances.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Modification:
Replace the first paragraph with the following:
Electrolysers shall be of class I, class II or class III. They may be class 0 if their rated
voltage does not exceed 150 V.
6.101 Electrolysers are classified as being
– intended for direct connection of the appliance supply cord to the electrolyser terminals,
or
– not intended for direct connection of the appliance supply cord to the electrolyser
terminals.
NOTE 1 Electrolysers can, in both cases, be delivered with or without the supply cord.
NOTE 2 Electrolysers intended for direct connection of the appliance supply cord to their terminals can also be
used without the supply cord being connected directly to their terminals.
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 Modification:
The rated power input or rated current need not be marked.
7.5 Not applicable.
7.7 Not applicable.
7.12 Replacement:
The instructions shall contain the quantity and details of the electrolyte to be used and details
of the chemical reactions that occur in the electrolyser.
NOTE Details of the electrolyte used can be given, for example, in terms of a generic name or a manufacturer's
part number.
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.
8.1.1 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
– 12 – IEC 60335-2-108:2024 © IEC 2024
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 not applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 101 is used to measure the temperature rises of external accessible surfaces
specified in Table 101. The probe is applied with a force of 4 N ± 1 N to the surface in such a
way that the best possible contact between the probe and the surface is ensured. The
measurement is performed after a contact period of 30 s.
The probe may be held in place using a laboratory stand clamp or similar device. Any measuring
instrument giving the same results as the probe may be used.
11.7 Modification:
Replace the first paragraph with the following:
Electrolysers are operated until steady conditions are established.
11.8 Modification:
Replace the first paragraph with the following:
During the test, the temperature rises are monitored continuously and shall not exceed the
values shown in Table 3 and Table 101.
Table 101 – Maximum temperature rises for specified external accessible
surfaces under normal operating conditions
a
Surface
Temperature rise of external accessible surfaces
K
Surfaces of appliances Surfaces of appliances
situated not more than situated more than
850 mm above the floor 850 mm above the floor
after installation or in after installation or in
normal use normal use
Bare metal 38 42
b
42 49
Coated metal
Glass and ceramic 51 56
c d
58 62
Plastic and plastic coating > 0,4 mm ,
NOTE The temperature rise limits of handles, knobs, grips, keyboards, keypads and similar parts are specified in
Table 3.
a
Temperature rises are not measured on:
– the underside of appliances intended to be used on a working surface or floor, where these surfaces are
inaccessible to a 75 mm diameter probe having a hemispherical end;
– the rear surface of appliances which, according to the instructions, shall be placed against a wall and where
these surfaces are inaccessible to a 75 mm diameter probe having a hemispherical end.
b
Metal is considered coated when a coating having a minimum thickness of 90 µm made of enamel, powder or
non-substantially plastic coating is used.
c
The temperature rise limit of plastic also applies for plastic material having a metal finish of thickness less than
0,1 mm.
d
When the thickness of the plastic coating does not exceed 0,4 mm, the temperature rise limits of coated metal
for underlying metal apply or the temperature rise limits for glass or ceramic material for underlying glass or
ceramic material apply.
12 Charging of metal-ion batteries
This clause of Part 1 is applicable.
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable
16 Leakage current and electric strength
This clause of Part 1 is applicable.
– 14 – IEC 60335-2-108:2024 © IEC 2024
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable.
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.2 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
21 Mechanical strength
This clause of Part 1 is applicable.
22 Construction
This clause of Part 1 is applicable except as follows.
22.6 Addition:
Elastomeric parts that withstand the ageing test specified in normative Annex AA are not
considered to be parts where leakage could occur.
Modification:
Instead of coloured water, a coloured solution from the electrolysed wash water is used.
22.101 Electrolysers shall be constructed so that they are always open to the atmosphere
through an aperture of at least 5 mm in diameter, or 20 mm in area with a width of at least
3 mm. The aperture shall be located so that it is unlikely to be obstructed in normal use.
Compliance is checked by inspection and by measurement.
22.102 During normal use of the electrolyser, the chemical reaction in the electrolyser shall
not produce hydrogen gas that is released in hazardous amounts into areas
• where electrical components that produce arcs and sparks during normal operation or
abnormal operation are mounted, unless these components have been tested and found at
least to comply with IEC 60079-15 for group IIC gases; or
• that contain surfaces with a temperature exceeding 460 °C during normal operation or
abnormal operation and that can be exposed to the released hydrogen gas.
Compliance is checked by inspection, by measuring the temperature of the relevant surfaces
during normal operation and abnormal operation and by the following test.
The electrolyser is operated for one cycle under conditions of normal operation.
The concentration of hydrogen gas in the relevant areas is measured continuously from the
beginning of the test until the end of the cycle. The background hydrogen concentration
measured prior to the test is subtracted from the maximum concentration measured during the
test.
The measured value shall not exceed 50 % of the lower flammability limit (LFL) of hydrogen.
NOTE 1 The LFL of hydrogen gas is 4 %V/V of air.
The instruments used for monitoring gas concentration, such as those which use infrared
sensing techniques, should have a fast response, typically 2 s to 3 s and should not unduly
influence the result of the test.
If gas chromatography is to be used, the gas sampling in confined areas should occur at a rate
not exceeding 2 ml every 30 s.
NOTE 2 Other instruments can be used provided that they do not unduly influence the results.
22.103 During normal use of the electrolyser, the chemical reaction in the electrolyser shall
not produce wash water that causes corrosion due to the pH value of the wash water.
Compliance is checked by the salt mist test, Kb of IEC 60068-2-52, severity 2 being applicable.
The pH value of the solution used shall be approximately equal to that of the wash water as
measured during normal use of the appliance if the value is greater than that specified in
IEC 60068-2-52.
Before the test, enclosures having a coating are scratched by means of a hardened steel pin,
the end of which has the form of a cone with a top angle of 40°. Its tip is rounded with a radius
of 0,25 mm ± 0,02 mm. The pin is loaded so that the force exerted along its axis is 10 N ± 0,5 N.
The pin is held at an angle of 80° to 85° to the horizontal and scratches are made by drawing
the pin along the surface of the coating at a speed of approximately 20 mm/s. Five scratches
are made at least 5 mm apart and at least 5 mm from the edges.
After the test, the electrolyser shall not have deteriorated to such an extent that compliance
with this standard, in particular with Clause 8 and Clause 27, is impaired. The coating shall not
be broken and shall not have loosened from the surface.
– 16 – IEC 60335-2-108:2024 © IEC 2024
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable.
25 Supply connection and external flexible cords
This clause of Part 1 is applicable.
26 Terminals for external conductors
This clause of Part 1 is applicable.
27 Provision for earthing
This clause of Part 1 is applicable.
28 Screws and connections
This clause of Part 1 is applicable.
29 Clearances, creepage distances and solid insulation
This clause of Part 1 is applicable except as follows.
29.2 Replacement:
The microenvironment is pollution degree 3, and the insulation shall have a CTI not less than
250, unless the insulation is enclosed or located so that it is unlikely to be exposed to pollution
during normal use of the electrolyser due to electrolyte used.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.2.2 Not applicable.
31 Resistance to rusting
This clause of Part 1 is applicable.
32 Radiation, toxicity and similar hazards
This clause of Part 1 is applicable except as follows.
Addition:
The ozone concentration produced by the chemical reactions in the electrolyser shall not be
excessive.
Compliance is checked by the following test, which is carried out in a room without openings
having dimensions of 2,5 m × 3,5 m × 3,0 m, the walls being covered with polyethylene sheet.
The room is maintained at approximately 25 °C and 50 % relative humidity. The electrolyser is
positioned in accordance with the instructions and then operated for one cycle under conditions
of normal operation.
The ozone sampling tube is to be located 10 mm from the gas outlet aperture specified in 22.101.
The background ozone concentration measured prior to the test is subtracted from the maximum
concentration measured during the test.
-6
The percentage of ozone in the room shall not exceed 5 × 10 .
Key
A adhesive
B thermocouple wires 0,3 mm diameter to IEC 60584-1 Type K
C handle arrangement permitting a contact force of 4 N ± 1 N
D polycarbonate tube: inside diameter 3 mm, outside diameter 5 mm
E tinned copper disc: 5 mm diameter, 0,5 mm thick with a flat contact face
Figure 101 – Probe for measuring surface temperatures
– 18 – IEC 60335-2-108:2024 © IEC 2024
Annexes
The annexes of Part 1 are applicable except as follows.
Annex B
(normative)
Battery-operated appliances, separable batteries and
detachable batteries for battery-operated appliances
Annex B of Part 1 Is applicable except as follows.
B.22.3 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
B.22.4 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
– 20 – IEC 60335-2-108:2024 © IEC 2024
Annex AA
(normative)
Ageing test for elastomeric parts
The ageing test on elastomeric parts is carried out by measuring their hardness and mass
before and after immersion in a solution of the electrolysed portion of the wash water at elevated
temperature.
The test is carried out on at least three samples of each part. The samples and test procedure
are as specified in ISO 1817:2022, with the following modifications.
6 Test liquids
The liquid used is the electrolysed portion of the wash water obtained under the conditions of
Clause 11.
The total mass of the test pieces immersed shall not exceed 100 g for each litre of solution.
The test pieces are completely immersed with their entire surface freely exposed to the solution.
During the tests, the test pieces shall not be exposed to direct light. Test pieces of different
compounds shall not be immersed in the same solution at the same time.
7 Test pieces
7.4 Conditioning
The temperature is 23 °C ± 2 °C and the relative humidity is (50 ± 5) %.
8 Immersion in the test liquid
8.1 Temperature
+5
The solution is heated within 1 h with the test pieces immersed, to a temperature of 75 °C
and maintained at this value. The solution is renewed every 24 h and heated in the same way.
NOTE To avoid undue evaporation of the solution, it is recommended to use a closed-circuit system or similar
method for renewing the solution.
8.2 Duration
+1
The test pieces are immersed for a total period of 48 h.
The test pieces are then immediately immersed in a fresh solution that is maintained at ambient
temperature. The pieces are immersed for 45 min ± 15 min.
After having been removed from the solution, the test pieces are rinsed in cold water at
15 °C ± 5 °C and then dried with blotting paper.
9 Procedure
9.3 Change in mass
The increase in mass of the test pieces shall not exceed 10 % of the value determined before
immersion.
9.7 Change in hardness
The micro-test for hardness applies.
The hardness of the test pieces shall not have changed by more than 8 IRHD. Their surface
shall not have become sticky and shall show no crack visible to the naked eye or any other
deterioration.
– 22 – IEC 60335-2-108:2024 © IEC 2024
Annex BB
(informative)
Guidance for additional requirements to be considered for inclusion in the
end product standards for appliances that incorporate electrolysers
The following list is given as guidance for the detailed information that can need to be specified
in the end product standards for appliances that incorporate electrolysers:
• instruction to the user to avoid blocking the electrolyser aperture during use;
• application of 22.17 to spacers intended to prevent the electrolyser aperture being blocked
by walls;
• the need to apply 22.102 to the end product to check that hydrogen gas does not accumulate
in the vicinity of critical components;
• the need to apply 22.103 to the end product to check that the electrolysed water does not
cause corrosion of critical parts.
Bibliography
The Bibliography of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-5, Household and similar electrical appliances – Safety – Part 2: Particular
requirements for dishwashers
IEC 60335-2-7, Household and similar electrical appliances – Safety – Part 2: Particular
requirements for washing machines
ISO 13732-1, Ergonomics of the thermal environment – Methods for the assessment of human
responses to contact with surfaces – Part 1: Hot surfaces
___________
– 24 – IEC 60335-2-108:2024 © IEC 2024
SOMMAIRE
AVANT-PROPOS . 26
INTRODUCTION . 29
1 Domaine d’application . 31
2 Référe
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