IEC 60335-2-55:2021

Household and similar electrical appliances - Safety - Part 2-55: Particular requirements for electrical appliances for use with aquariums and garden ponds

IEC 60335-2-55:2021 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).
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).
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.

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

L'IEC 60335-2-55:2021 traite de la sécurité des appareils électriques destinés à être utilisés avec les aquariums et les bassins de jardin, et destinés à un usage domestique et analogue, 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.
La présente norme est applicable aux exemples d'appareils suivants, tels que:
- les aérateurs;
- les dispositifs de chauffage pour aquarium;
- les distributeurs automatiques de nourriture;
- les aspirateurs de boue.
Les appareils non destinés à un usage domestique normal, mais qui peuvent néanmoins constituer une source de danger pour le public, tels que les appareils destinés à être utilisés par des usagers non avertis dans des magasins, chez des artisans et dans des fermes, sont compris dans le domaine d'application de la présente norme.
Dans la mesure du possible, la présente norme traite des dangers courants que présentent les appareils et auxquels sont exposés tous les individus situés à l'intérieur et autour de l'habitation. Cependant, cette norme ne tient pas compte en général:
- des personnes (y compris des enfants) dont les capacités physiques, sensorielles ou mentales; ou le manque d'expérience et de connaissance les empêchent d'utiliser l'appareil en toute sécurité sans surveillance ou instruction;
- de l'utilisation de l'appareil comme jouet par des enfants.
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'avions, 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 et par des organismes similaires.
La présente norme ne s'applique pas
- aux pompes (IEC 60335-2-41);
- aux autres thermoplongeurs mobiles (IEC 60335-2-74);
- aux luminaires pour aquariums ou bassins de jardins (IEC 60598-2-18);
- aux appareils destinés à être utilisés en extérieur et dont la puissance assignée dépasse 100 W;
- aux appareils prévus exclusivement pour des usages professionnels;
- 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 quatrième édition annule et remplace la troisième édition parue en 2002 et l'Amendement 1:2008. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) alignement du texte sur l'IEC 60335-1:2020;
b) conversion en texte normatif ou suppression de certaines notes (Article 1, 5.2, 19.101, 21.1, 21.102, 22.101);
c) mise à jour du symbole de profondeur d'immersion (7.1, 7.6, 7.12);
d) introduction des limites d'échauffement des surfaces accessibles extérieures (Article 11).
La présente Partie 2 doit être utilisée conjointement avec la dernière édition de l'IEC 60335-1 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.

General Information

• Status: Published
• Publication Date: 04-Nov-2021
• ICS: 97.020 - Home economics in general
• Technical Committee: TC 61 - Safety of household and similar electrical appliances
• Drafting Committee: MT 37 - TC 61/MT 37
• Current Stage: PPUB - Publication issued
• Start Date: 05-Nov-2021
• Completion Date: 03-Dec-2021

Relations

• Revises: IEC 60335-2-55:2002 - Household and similar electrical appliances - Safety - Part 2-55: Particular requirements for electrical appliances for use with aquariums and garden ponds
• Effective Date: 05-Sep-2023
• Revises: IEC 60335-2-55:2002/AMD1:2008 - Amendment 1 - Household and similar electrical appliances - Safety - Part 2-55: Particular requirements for electrical appliances for use with aquariums and garden ponds
• Effective Date: 05-Sep-2023

Overview

IEC 60335-2-55:2021 is an international safety standard from the IEC for electrical appliances for use with aquariums and garden ponds (household and similar use). It applies to appliances with a rated voltage not more than 250 V (including DC and battery-operated devices) and covers common hazards encountered in and around the home. Examples in scope include aerators, aquarium heaters, automatic food dispensers, and sludge-suction appliances. This fourth edition (2021) is a technical revision that replaces the 2002 edition and its 2008 amendment.

Key topics and technical requirements

This Part 2 document supplements and modifies the general requirements of IEC 60335-1 and addresses particular hazards for aquarium and pond equipment. Major topics include:

• Scope and applicability - rated voltage ≤ 250 V; appliances for laymen in shops, farms and light industry are included; many professional or outdoor >100 W appliances are excluded.
• Marking and instructions (Clause 7) - labelling, user guidance and safety information for correct operation.
• Protection against live parts (Clause 8) and leakage current / electric strength (Clauses 13, 16) - electrical insulation and safe leakage current limits.
• Heating and temperature limits (Clause 11) - limits on temperature rise of externally accessible surfaces; Table 101 and Figure 101 provide measurement guidance.
• Moisture resistance, immersion depths and construction (Clauses 15, 22; updated immersion symbol references) - addressing wet and submerged use conditions specific to aquariums and ponds.
• Mechanical safety - stability, mechanical strength, and moving parts (Clauses 20–21).
• Endurance, abnormal operation and overload protection (Clauses 18–19, 17) - durability and safety during fault conditions.
• Component and wiring requirements - internal wiring, terminals, earthing, clearances and creepage distances (Clauses 23–29).

Significant changes in the 2021 edition include alignment with IEC 60335-1:2020, conversion of some notes to normative text, updated immersion depth symbol, and new limits on external surface temperature rise.

Practical applications

Manufacturers, product designers and compliance engineers use IEC 60335-2-55 to:

• Design safer aquarium and pond appliances (heaters, pumps, feeders, aerators).
• Define product specifications for insulation, enclosures, and surface temperatures.
• Prepare test plans for type testing and conformity assessment.
• Create user instructions and marking that meet international safety expectations.
• Support certification and market approval in countries adopting IEC standards.

Who should use this standard

• Appliance manufacturers and R&D teams
• Test laboratories and conformity assessment bodies
• Regulatory and certification authorities
• Safety and compliance engineers
• Importers, distributors and technical documentation authors

Related standards

• IEC 60335-1 (general household appliance safety) - required companion standard
• IEC 60335-2-41 (pumps), IEC 60335-2-74 (immersion heaters), IEC 60598-2-18 (luminaires) - referenced exclusions and related Parts
• National wiring rules (e.g., IEC 60364) and country-specific health and labour regulations may impose additional requirements.

Using IEC 60335-2-55 helps ensure aquarium and garden pond electrical appliances meet international safety best practices for electrical, mechanical and thermal hazards.

Standards Content (Sample)

IEC 60335-2-55 ®
Edition 4.0 2021-11
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-55: Particular requirements for electrical appliances for use with
aquariums and garden ponds
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IEC 60335-2-55 ®
Edition 4.0 2021-11
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-55: Particular requirements for electrical appliances for use with
aquariums and garden ponds
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.020 ISBN 978-2-8322-4097-7

– 2 – IEC 60335-2-55:2021 RLV © 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 Void 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
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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
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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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes made to
the previous edition IEC 60335-2-55:2002+AMD1:2008 CSV. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in strikethrough
red text.
– 4 – IEC 60335-2-55:2021 RLV © IEC 2021
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).
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).
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

– 6 – IEC 60335-2-55:2021 RLV © 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 and generic standards 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.
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.
NOTE 101 Examples of appliances within the scope of 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 may 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.
NOTE 102 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 and similar authorities.
NOTE 103 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 RLV © 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 Replacement Addition:
normal operation
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:
NOTE 101 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, if greater than
1 m in meters, with a minimum of 1 m, using symbol IEC 60417-6444 (2020-12).
7.6 Addition:
. . . m
maximum operating depth
[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 RLV © 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 Replacement 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 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.

– 12 – IEC 60335-2-55:2021 RLV © 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.
NOTE The aerator is not placed in water.
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.
NOTE 101 Care is to be taken to ensure that the complete length of the glass enclosure is 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.
NOTE This test is not applied to heaters intended to be placed on the bottom of the aquarium.
21.103 Class II appliances for use in water are supplied at rated voltage and operated under
normal operation until steady conditions are established.

– 14 – IEC 60335-2-55:2021 RLV © IEC 2021
If the outer enclosure or its sealing means have been damaged during the impact test, they are
made ineffective.
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.
NOTE Keyhole slots, hooks, suction fasteners and similar means, without any further means to prevent the
appliance from being inadvertently lifted off the support, are not considered to be adequate means for fixing the
appliance securely.
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 RLV © 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 RLV © 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
ISO 13732-1, Ergonomics of the thermal environment – Methods for the assessment of human
responses to contact with surfaces – Part 1: Hot surfaces

___________
IEC 60335-2-55 ®
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

– 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,
Publicl
...

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

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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
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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

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