IEC 60335-2-55:2021

IEC 60335-2-55 ®
Edition 4.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-55: Particular requirements for electrical appliances for use with
aquariums and garden ponds
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-55: Exigences particulières pour les appareils électriques destinés à
être utilisés avec les aquariums et les bassins de jardin

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC - IEC online collection - oc.iec.ch
webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez
La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications. Avec un
en utilisant différents critères (numéro de référence, texte, abonnement, vous aurez toujours accès à un contenu à jour
comité d’études, …). Elle donne aussi des informations sur adapté à vos besoins.
les projets et les publications remplacées ou retirées.

Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au
Restez informé sur les nouvelles publications IEC. Just
monde, avec plus de 22 000 articles terminologiques en
Published détaille les nouvelles publications parues.
anglais et en français, ainsi que les termes équivalents dans
Disponible en ligne et une fois par mois par email.
16 langues additionnelles. Egalement appelé Vocabulaire

Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc

Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
IEC 60335-2-55 ®
Edition 4.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-55: Particular requirements for electrical appliances for use with

aquariums and garden ponds
Appareils électrodomestiques et analogues – Sécurité –

Partie 2-55: Exigences particulières pour les appareils électriques destinés à

être utilisés avec les aquariums et les bassins de jardin

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.020 ISBN 978-2-8322-1044-8

– 2 – IEC 60335-2-55:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 General requirement . 8
5 General conditions for the tests . 9
6 Classification . 9
7 Marking and instructions . 9
8 Protection against access to live parts . 10
9 Starting of motor-operated appliances . 10
10 Power input and current . 10
11 Heating . 10
12 Charging of metal-ion batteries . 11
13 Leakage current and electric strength at operating temperature . 11
14 Transient overvoltages . 11
15 Moisture resistance . 12
16 Leakage current and electric strength . 12
17 Overload protection of transformers and associated circuits . 12
18 Endurance . 12
19 Abnormal operation . 12
20 Stability and mechanical hazards . 13
21 Mechanical strength . 13
22 Construction . 14
23 Internal wiring . 14
24 Components . 14
25 Supply connection and external flexible cords . 14
26 Terminals for external conductors . 15
27 Provision for earthing . 15
28 Screws and connections . 15
29 Clearances, creepage distances and solid insulation . 15
30 Resistance to heat and fire . 15
31 Resistance to rusting . 15
32 Radiation, toxicity and similar hazards . 15
Annexes . 17
Bibliography . 18

Figure 101 – Probe for measuring surface temperatures . 16

Table 101 – Maximum temperature rises for specified external surfaces under normal
operating conditions . 11

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-55: Particular requirements for electrical appliances
for use with aquariums and garden ponds

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60335-2-55 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2002 and
Amendment 1:2008. 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 or deleted (Clause 1, 5.2, 19.101, 21.1,
21.102, 22.101);
c) updated the depth of immersion symbol (7.1, 7.6, 7.12);
d) limits on the temperature rise of external accessible surfaces have been introduced
(Clause 11).
– 4 – IEC 60335-2-55:2021 © IEC 2021
The text of this International Standard is based on the following documents:
Draft Report on voting
61/6379/FDIS 61/6429/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 60335 series, published under the general title Household and
similar electrical appliances – Safety, can be found on the IEC website.
This Part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
NOTE 1 When "Part 1" is mentioned in this standard, it refers to IEC 60335-1.
This Part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert
that publication into the IEC standard: Particular requirements for electrical appliances for use
with aquariums and garden ponds.
When a particular subclause of Part 1 is not mentioned in this Part 2, that subclause applies as
far as is reasonable. When this standard states "addition", "modification" or "replacement", the
relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation nationally
not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.
– 6.1: Class 0 appliances for indoor use having a rated voltage not exceeding 150 V and class 0I appliances are
allowed (Japan).
– 6 – IEC 60335-2-55:2021 © IEC 2021
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website –
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another Part 2 of IEC 60335, the relevant Part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a Part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the Part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal publications, basic safety publications and group safety publications covering a hazard are not
applicable since they have been taken into consideration when developing the general and particular requirements
for the IEC 60335 series of standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of the
requirements and, if found to be substantially equivalent, may be considered to comply with the
standard.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods 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 2-55: Particular requirements for electrical appliances
for use with aquariums and garden ponds

1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of electric appliances for use with aquariums and
garden ponds for household and similar purposes, their rated voltage being not more than 250
V, including direct current (DC) supplied appliances and battery-operated appliances.
Examples of appliances that this standard is applicable to are
– aerators;
– aquarium heaters;
– automatic food dispensers;
– sludge-suction appliances.
Appliances not intended for normal household use but that nevertheless can be a source of
danger to the public, such as appliances intended to be used by laymen in shops and in light
industry and farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances
that are encountered by all persons in and around the home. However, in general, it does not
take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
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 and similar authorities.
This standard does not apply to
– pumps (IEC 60335-2-41);
– other portable immersion heaters (IEC 60335-2-74);
– luminaires for aquariums and garden ponds (IEC 60598-2-18);
– appliances intended for outdoor use having a rated power input exceeding 100 W;
– appliances intended exclusively for professional use;
– 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).

– 8 – IEC 60335-2-55:2021 © IEC 2021
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.9 Addition:
operation of the appliance under the following conditions:
Aerators are operated with the outlet immersed in water at a depth of 1 m or at the maximum
operating depth if this results in a higher power input.
Sludge-suction appliances are operated with the inlet immersed in water at a depth of 1 m or
at the maximum operating depth if this results in a higher power input.
Automatic food dispensers are operated with the dispenser initially filled with the maximum
quantity of food.
Heaters are operated in a sufficient quantity of water to maintain the water temperature between
20 °C and 25 °C without the thermostat cycling.
3.5 Definitions relating to types of appliances
3.5.101
aerator
appliance that pumps air into the water in order to increase the oxygen content
3.5.102
sludge-suction appliance
hand-held appliance for removing deposits from aquariums or ponds
3.6 Definitions relating to parts of an appliance
3.6.101
functional surface
surface that is intentionally heated by an internal heat source and has to be hot to carry out the
function for which the appliance is intended
Note 1 to entry: An example is the heated sheath of a tubular heating element.
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.
5.2 Addition:
If the test of 21.103 has to be carried out, an additional sample is required.
6 Classification
This clause of Part 1 is applicable except as follows.
6.2 Addition:
Appliances for use in water shall be IPX8.
Appliances for use above water shall be at least IPX7 unless they are intended to be fixed, in
which case they shall be at least IPX4.
Other appliances shall be at least IPX4.
These requirements do not apply to class III appliances.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances for use in water shall be marked with the maximum operating depth, in meters, with
a minimum of 1 m, using symbol IEC 60417-6444 (2020-12).
7.6 Addition:
[symbol IEC 60417-6444 (2020-12)] maximum operating depth
where X specifies the value
7.12 Addition:
The instructions shall include details regarding
– the operation of the appliance;
– the precautions to be taken for appliances not intended to be used in water;
– the maintenance of the appliance.
The instructions for appliances intended to be fully immersed in water shall state the maximum
operating depth, with a minimum of 1 m. If symbol IEC 60417-6444 (2020-12) is used its
meaning shall be explained.
– 10 – IEC 60335-2-55:2021 © IEC 2021
The instructions for appliances, other than class III appliances, shall include the substance of
the following:
WARNING: Unplug or switch off all appliances in the aquarium or pond before carrying out
maintenance.
7.12.1 Addition:
The installation instructions for appliances intended to be used above water shall include details
regarding fixing, unless they are at least IPX7.
The installation instructions of appliances for outdoor use shall state that the appliance is to be
supplied through a residual current device (RCD) having a rated residual operating current not
exceeding 30 mA.
The installation instructions of class III appliances shall include details regarding the fixing
and location of safety isolating transformers to prevent them from falling into the water or from
being affected by water.
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.3 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 Addition:
Appliances are operated until steady conditions are established.
11.8 Modification:
During the test, the temperature rises are monitored continuously and shall not exceed the
values shown in Table 3 and Table 101.

Addition:
The temperature rise of handles or grips of vents and air shutters shall not exceed the value
specified in Table 3 for surfaces of handles, knobs, grips and similar parts which are held for
short periods only in normal use.
Table 101 – Maximum temperature rises for specified external
surfaces under normal operating conditions
a
Temperature rises of external accessible surfaces
K
Surface
Surfaces of portable Surfaces of hand-held
appliances situated on the appliances and other
floor appliances
Bare metal 38 42
b
42 49
Coated metal
Glass and ceramic 51 56
c, d
Plastic and plastic coating > 0,4 mm 58 62
NOTE 101 The temperature rise limits of knobs, grips, keyboards, keypads and similar parts are specified in
Table 3.
a
Temperature rises are not measured on
– surfaces that are inaccessible to a 75 mm diameter probe having a hemispherical end, applied with a
force not exceeding 1 N;
– functional surfaces;
– surfaces within 25 mm of the outline of the functional surfaces.
b
Metal is considered coated when a coating having a minimum thickness of 90 µm made of enamel 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.

– 12 – IEC 60335-2-55:2021 © IEC 2021
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.1.2 Addition:
Appliances for use in water are immersed for 24 h in water containing approximately 1 % NaCl
and having a temperature of 15 °C ± 5 °C. The appliance is immersed in its normal position of
use so that
– its lowest point is located 1 m below the surface, for appliances having a height less than
0,85 m;
– its highest point is located 0,15 m below the surface of the water, for other appliances.
However, if the appliance is marked with a maximum operating depth, its lowest point shall be
located at this depth.
During immersion, the appliance is supplied at rated voltage and operated in cycles, each cycle
consisting of 1 h on and 1 h off.
15.3 Addition:
Appliances classified IPX8 are not subjected to this test.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Addition:
Aerators are also subjected to the test of 19.101.
19.2 Addition:
Heaters are operated in their normal position of use but without being immersed.
19.101 Aerators for use in water are supplied at rated voltage and operated under normal
operation until steady conditions are established. Valves are rendered inoperative in turn and
in any combination. After cooling down, the aerator is removed from the water.

Inspection shall show that water has not entered places where electrical components are
located. The conditions of 19.13 are not applicable.
Other aerators are supplied at rated voltage and operated for 5 min with the aerator and its
outlet placed in the most unfavourable position with regard to the water level. The aerator is
not placed in water. Valves are rendered inoperative in turn and in any combination.
20 Stability and mechanical hazards
This clause of Part 1 is applicable.
21 Mechanical strength
This clause of Part 1 is applicable except as follows.
21.1 Addition:
After the application of the impact hammer, aerators for use in water are subjected to the test
of 21.101.
For aquarium heaters having a glass enclosure, the impact energy is reduced to 0,2 J and the
blows are applied once to three points of the enclosure that are likely to be weak. For this test,
the complete length of the glass enclosure shall be in contact with the polyamide sheet.
The heater is then subjected to the test of 21.102.
Class II appliances for use in water are subjected to the test of 21.103, which is carried out on
a new appliance.
21.101 Aerators for use in water are operated at rated voltage while immersed in water at a
depth of 1 m or at the maximum operating depth, whichever is greater, until steady conditions
are established. The aerator is then switched off, allowed to cool down and removed from the
water.
Inspection shall show that water has not entered places where electrical components are
located.
21.102 Heaters, other than those intended to be placed on the bottom of the aquarium, having
a glass enclosure are fully immersed in water in the vertical position. The quantity of water in
the vessel is between 0,33 l and 0,5 l for each watt of rated power input. The heater is supplied
at rated voltage and operated so that the water temperature stabilizes between 20 °C and
25 °C. Water is then removed until half the length of the glass enclosure is exposed. When the
heater is at maximum temperature during the cycle of operation of the thermal control, the
vessel is refilled with water having a temperature of 15 °C ± 2 °C.
Inspection shall show that water has not entered places where electrical components are
located.
21.103 Class II appliances for use in water are supplied at rated voltage and operated under
normal operation until steady conditions are established.
If the outer enclosure or its sealing means have been damaged during the impact test, they are
made ineffective.
– 14 – IEC 60335-2-55:2021 © IEC 2021
The appliance is then immersed in water containing approximately 1 % NaCl and having a
temperature of 20 °C ± 5 °C. The highest point of the appliance is located 150 mm below the
surface of the solution.
After 30 s, the leakage current is measured, as specified in 13.2, between any pole of the supply
and a rectangular stainless steel electrode, having dimensions approximately 250 mm × 50 mm,
placed in the solution.
The leakage current shall not exceed 3 mA.
22 Construction
This clause of Part 1 is applicable except as follows.
22.33 Addition:
Water is allowed to be in contact with reinforced insulation of aquarium heaters having a glass
enclosure.
22.101 Appliances intended to be fixed above water shall be constructed so that they can be
fixed securely to a support, unless they are classified at least IPX7.
Keyhole slots, hooks, suction fasteners and similar means, without any further means of fixing
the appliance to a support shall not be used, unless the appliance is classified at least IPX7.
Compliance is checked by inspection.
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable.
25 Supply connection and external flexible cords
This clause of Part 1 is applicable except as follows.
25.5 Addition:
Type X attachment is not allowed for appliances classified IPX7 or IPX8.
Type Z attachment is allowed.
25.7 Addition:
The supply cord of appliances intended for outdoor use, other than class III appliances, shall
be polychloroprene sheathed cord and not be lighter than ordinary polychloroprene sheathed
flexible cord (code designation 60245 IEC 57).

26 Terminals for external conductors
This clause of Part 1 is applicable.
27 Provision for earthing
This clause of Part 1 is applicable.
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.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.2 Addition:
For sludge-suction appliances, 30.2.2 is applicable. For other appliances, 30.2.3 is
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.

– 16 – IEC 60335-2-55:2021 © IEC 2021

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 flat contact face
Figure 101 – Probe for measuring surface temperatures

Annexes
The annexes of Part 1 are applicable.

– 18 – IEC 60335-2-55:2021 © IEC 2021
Bibliography
The bibliography of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-41, Household and similar electrical appliances – Safety – Part 2-41: Particular
requirements for pumps
IEC 60335-2-74, Household and similar electrical appliances – Safety – Part 2-74: Particular
requirements for portable immersion heaters
IEC 60598-2-18, Luminaires – Part 2: Particular requirements – Section 18: Luminaires for
swimming pools and similar applications

___________
– 20 – IEC 60335-2-55:2021 © IEC 2021
SOMMAIRE
AVANT-PROPOS . 21
INTRODUCTION . 24
1 Domaine d'application . 25
2 Références normatives . 26
3 Termes et définitions . 26
4 Exigences générales . 27
5 Conditions générales d'essais . 27
6 Classification . 27
7 Marquage et instructions . 27
8 Protection contre l'accès aux parties actives. 28
9 Démarrage des appareils à moteur . 28
10 Puissance et courant . 28
11 Echauffements. 28
12 Charge des batteries à ions métalliques . 29
13 Courant de fuite et rigidité diélectrique à la température de régime . 30
14 Surtensions transitoires . 30
15 Résistance à l'humidité . 30
16 Courant de fuite et rigidité diélectrique . 30
17 Protection contre la surcharge des transformateurs et des circuits associés . 30
18 Endurance . 30
19 Fonctionnement anormal . 30
20 Stabilité et dangers mécaniques . 31
21 Résistance mécanique . 31
22 Construction . 32
23 Conducteurs internes. 32
24 Composants . 32
25 Raccordement au réseau et câbles souples extérieurs . 33
26 Bornes pour conducteurs externes . 33
27 Dispositions en vue de la mise à la terre . 33
28 Vis et connexions . 33
29 Distances dans l'air, lignes de fuite et isolation solide. 33
30 Résistance à la chaleur et au feu . 33
31 Protection contre la rouille . 33
32 Rayonnement, toxicité et dangers analogues . 33
Annexes . 35
Bibliographie . 36

Figure 101 – Calibre pour le mesurage des températures de surface . 34

Tableau 101 – Echauffements maximaux pour les surfaces extérieures spécifiées en
conditions de fonctionnement normal . 29

COMM
...