IEC 60335-2-52:2021

Household and similar electrical appliances - Safety - Part 2-52: Particular requirements for oral hygiene appliances

IEC 60335-2-52:2021 is available as IEC 60335-2-52:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60335-2-52:2021 deals with the safety of electric oral hygiene appliances 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
- oral irrigators;
- toothbrushes.
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 appliances for medical purposes (IEC 60601).
This fourth edition cancels and replaces the third edition published in 2002, Amendment 1: 2008 and Amendment 2:2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 11.7, 22.101);
c) clarification of requirements for battery-operated appliances (Clause 1, 11.7, B.11.1);
d) application of test probe 19 has been introduced (8.1.1, 20.2);
e) the stability test has been updated to cover hand-held parts of battery-operated appliances when placed on their charging stand (20.1);
f) a drop test is introduced for hand-held parts of an appliance (21.101);
g) additional strength tests for detachable power supply parts are introduced (21.102);
h) Table B.2 and Table B.3 updated to reflect smaller cell capacities for battery-operated appliances covered by this Part 2 standard.
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 2-52: Exigences particulières pour les appareils d'hygiène buccale

IEC 60335-2-52:2021 est disponible sous forme de IEC 60335-2-52:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 60335-2-52:2021 traite de la sécurité des appareils d'hygiène buccale électriques destinées 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 jets dentaires;
- les brosses à dents.
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 appareils à usage médical (IEC-60601).
Cette quatrième édition annule et remplace la troisième édition parue en 2002 et l'Amendement 1:2008 et l'Amendement 2:2017. 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 de certaines notes (Article 1, 11.7, 22.101);
c) clarification des exigences pour les appareils alimentés par batteries (Article 1, 11.7, B.11.1);
d) introduction de l'application du calibre d'essai 19 (8.1.1, 20.2);
e) mise à jour de l'essai de stabilité pour couvrir les parties tenues à la main des appareils alimentés par batteries lorsqu'ils sont placés sur leur socle de charge (20.1);
f) introduction d'un essai de chute pour les parties tenues à la main des appareils (21.101);
g) introduction d'essais de résistance supplémentaires pour les parties d'alimentation amovibles (21.102);
h) mise à jour du Tableau B.2 et du Tableau B.3 pour refléter les capacités des éléments de plus petite taille pour les appareils alimentés par batteries couverts par la présente Partie 2.
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: 10-Nov-2021
• ICS: 13.120 - Domestic safety
• ICS: 97.170 - Body care equipment
• Technical Committee: TC 61 - Safety of household and similar electrical appliances
• Current Stage: PPUB - Publication issued
• Completion Date: 11-Nov-2021

Standards Content (Sample)

IEC 60335-2-52
Edition 4.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-52: Particular requirements for oral hygiene appliances
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-52: Exigences particulières pour les appareils d'hygiène buccale
IEC 60335-2-52:2021-11(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60335-2-52
Edition 4.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-52: Particular requirements for oral hygiene appliances
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-52: Exigences particulières pour les appareils d'hygiène buccale
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120; 97.170 ISBN 978-2-8322-1045-8

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60335-2-52:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 9

4 General requirement ........................................................................................................ 9

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 ....................................................................................................... 11

16 Leakage current and electric strength ............................................................................ 11

17 Overload protection of transformers and associated circuits .......................................... 11

18 Endurance ..................................................................................................................... 11

19 Abnormal operation ....................................................................................................... 12

20 Stability and mechanical hazards ................................................................................... 12

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

Annex B (normative) Battery-operated appliances, separable batteries and detachable

batteries for battery-operated appliances .............................................................................. 18

Bibliography .......................................................................................................................... 20

Figure 101 – Probe for measuring surface temperatures ....................................................... 16

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IEC 60335-2-52:2021 © IEC 2021 – 3 –

Table 101 – Maximum temperature rises of external accessible surfaces under normal

operating conditions .............................................................................................................. 11

Table B.2 – Total area of openings for metal-ion cells ........................................................... 18

Table B.3 – Volume of air injected at 2 070 kPa .................................................................... 18

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– 4 – IEC 60335-2-52:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-52: Particular requirements for oral hygiene appliances
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,

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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

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

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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 60335-2-52 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, Amendment 1: 2008

and Amendment 2:2017. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 11.7, 22.101);

c) clarification of requirements for battery-operated appliances (Clause 1, 11.7, B.11.1);

d) application of test probe 19 has been introduced (8.1.1, 20.2);

e) the stability test has been updated to cover hand-held parts of battery-operated appliances

when placed on their charging stand (20.1);
---------------------- Page: 6 ----------------------
IEC 60335-2-52:2021 © IEC 2021 – 5 –
f) a drop test is introduced for hand-held parts of an appliance (21.101);

g) additional strength tests for detachable power supply parts are introduced (21.102);

h) Table B.2 and Table B.3 updated to reflect smaller cell capacities for battery-operated

appliances covered by this Part 2 standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
61/6368/FDIS 61/6418/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 oral hygiene appliances.

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.
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– 6 – IEC 60335-2-52:2021 © IEC 2021

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 are allowed (Japan).
– 6.1: Appliances may have other classifications (USA).
– 7.12.1: Additional instructions are required (USA).
– 11.7: The duration and number of cycles are different (USA).
– 19.101: The test is different (USA).
– 22.36: Hand-held parts may be class 0 construction (Japan).
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IEC 60335-2-52:2021 © IEC 2021 – 7 –
INTRODUCTION

It has been assumed in the drafting of this International Standard that the execution of its

provisions is entrusted to appropriately qualified and experienced persons.

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.
---------------------- Page: 9 ----------------------
– 8 – IEC 60335-2-52:2021 © IEC 2021
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-52: Particular requirements for oral hygiene appliances
1 Scope
This clause of Part 1 is replaced by the following.

This part of IEC 60335 deals with the safety of electric oral hygiene appliances 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
– oral irrigators;
– toothbrushes.

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 appliances for medical purposes (IEC 60601).
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
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IEC 60335-2-52:2021 © IEC 2021 – 9 –
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:

Oral irrigators are operated with the reservoir filled with water having a temperature of

approximately 45 °C, to the level specified in the instructions. In the absence of such

instructions, the reservoir is filled to the maximum level.
Other appliances are operated without load.
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Modification:
Appliances shall be class II or class III.
6.2 Addition:
Appliances shall be at least IPX7.
This classification does not apply to:

– parts that are intended to be fixed and detachable power supply parts with pins for

insertion into socket outlets that are at least IPX4; or

– class III appliances or parts of class III construction, including hand-held parts, that are

at least IPX4.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.12.1 Addition:

The installation instructions shall state that parts that have to be fixed must be fixed so that

they cannot fall into water, unless they are of IPX7 construction.
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– 10 – IEC 60335-2-52:2021 © IEC 2021
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.
8.1.1 Addition:

For toothbrushes, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also

applied as specified for test probe 18.
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 Modification:

Appliances are operated for five cycles, each cycle comprising an operating period of 3 min and

a rest period of 1 min. During the rest period, the reservoir of oral irrigators is refilled. If the

reservoir empties during the operating period, it is refilled and the test is continued.

For appliances incorporating integral batteries or separable batteries not disconnected from

the appliance for charging purposes:

– the battery that has been fully discharged is charged for 1 h, while the appliance is

operated as specified, if allowed by the construction of the appliance;

– the battery that has been fully discharged is charged, for a duration of 24 h or until it is

fully charged whichever is shorter, without the battery-operated appliance performing its

intended function.
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.
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IEC 60335-2-52:2021 © IEC 2021 – 11 –
Addition:
Table 101 – Maximum temperature rises of external accessible surfaces
under normal operating conditions
Surface Temperature rise of external accessible surfaces
Bare metal 38
Coated metal
Glass and ceramic 51
b, c
Plastic and plastic coating > 0,4 mm

NOTE The temperature rise limits of knobs, grips, keyboards, keypads and similar parts are specified in Table 3.

Metal is considered coated when a coating having a minimum thickness of 90 µm made of enamel or non-

substantially plastic coating is used.

The temperature rise limit of plastic also applies for plastic material having a metal finish of thickness less than

0,1 mm.

When the thickness of the plastic coating does not exceed 0,4 mm, the temperature rise limits of the coated

metal or of glass and ceramic material apply.
12 Charging of metal-ion batteries
This clause of Part 1 is applicable.
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This
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