IEC 60335-2-98:2002

INTERNATIONAL IEC
STANDARD 60335-2-98
Edition 2.1
2005-01
Edition 2:2002 consolidated with amendment 1:2004
Household and similar electrical appliances –
Safety –
Part 2-98:
Particular requirements for humidifiers

Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,

edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
x IEC Web Site (www.iec.ch)
x Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to
search by a variety of criteria including text searches, technical committees
and date of publication. On-line information is also available on recently issued
publications, withdrawn and replaced publications, as well as corrigenda.
x IEC Just Published
This summary of recently issued publications (www.iec.ch/online_news/ justpub)
is also available by email. Please contact the Customer Service Centre (see
below) for further information.
x Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:
Email: custserv@iec.ch
Tel: +41 22 919 02 11
Fax: +41 22 919 03 00
INTERNATIONAL IEC
STANDARD 60335-2-98
Edition 2.1
2005-01
Edition 2:2002 consolidated with amendment 1:2004
Household and similar electrical appliances –
Safety –
Part 2-98:
Particular requirements for humidifiers

© IEC 2005 ⎯ Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale CD
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 60335-2-98 © IEC:2002+A1:2004(E)

CONTENTS
FOREWORD.3

INTRODUCTION.5

1 Scope.6

2 Normative references.6

3 Definitions.6

4 General requirements.7
5 General conditions for the tests .7
6 Classification.7
7 Marking and instructions.7
8 Protection against access to live parts .8
9 Starting of motor-operated appliances.8
10 Power input and current.8
11 Heating.8
12 Void .9
13 Leakage current and electric strength at operating temperature .9
14 Transient overvoltages.9
15 Moisture resistance.9
16 Leakage current and electric strength .9
17 Overload protection of transformers and associated circuits .9
18 Endurance.10
19 Abnormal operation.10
20 Stability and mechanical hazards .10
21 Mechanical strength.10
22 Construction.10
23 Internal wiring.11
24 Components.11
25 Supply connection and external flexible cords .11

26 Terminals for external conductors .11
27 Provision for earthing.11
28 Screws and connections.11
29 Clearances, creepage distances and solid insulation .12
30 Resistance to heat and fire .12
31 Resistance to rusting.12
32 Radiation, toxicity and similar hazards .12
Annexes .13
Bibliography .13

60335-2-98 © IEC:2002+A1:2004(E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-98: Particular requirements for humidifiers

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This part of International Standard IEC 60335 has been prepared by IEC technical committee 61:
Safety of household and similar electrical appliances.
This consolidated version of IEC 60335-2-98 is based on the second edition (2002)
[documents 61/2231/FDIS and 61/2306/RVD] and its amendment 1 (2004) [documents
61/2746/FDIS and 61/2797/RVD].
It bears the edition number 2.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
– 4 – 60335-2-98 © IEC:2002+A1:2004(E)

This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) 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: Safety requirements for electric humidifiers.

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 the base publication and its amendments will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The following differences exist in the countries indicated below.
– Clause 1: Electrode-type appliances and appliances with bare-heating elements are only allowed if they are
for permanent connection to fixed wiring (Netherlands).
– 7.12.1: The minimum rated pressure is 1,0 MPa (Denmark, Sweden and Norway).
– 24.101: The requirement is not applicable (USA).

A bilingual version of this publication may be issued at a later date.

60335-2-98 © IEC:2002+A1:2004(E) – 5 –

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.

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 a
...

NORME CEI
INTERNATIONALE
IEC
60335-2-98
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2002-11
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-98:
Règles particulières pour les humidificateurs

Household and similar electrical appliances –
Safety –
Part 2-98:
Particular requirements for humidifiers
Numéro de référence
Reference number
CEI/IEC 60335-2-98:2002
Numérotation des publications Publication numbering
Depuis le 1er janvier 1997, les publications de la CEI As from 1 January 1997 all IEC publications are
sont numérotées à partir de 60000. Ainsi, la CEI 34-1 issued with a designation in the 60000 series. For
devient la CEI 60034-1. example, IEC 34-1 is now referred to as IEC 60034-1.
Editions consolidées Consolidated editions
Les versions consolidées de certaines publications de la The IEC is now publishing consolidated versions of its
CEI incorporant les amendements sont disponibles. Par publications. For example, edition numbers 1.0, 1.1
exemple, les numéros d’édition 1.0, 1.1 et 1.2 indiquent and 1.2 refer, respectively, to the base publication,
respectivement la publication de base, la publication de the base publication incorporating amendment 1 and
base incorporant l’amendement 1, et la publication de the base publication incorporating amendments 1
base incorporant les amendements 1 et 2. and 2.
Informations supplémentaires Further information on IEC publications
sur les publications de la CEI
Le contenu technique des publications de la CEI est The technical content of IEC publications is kept
constamment revu par la CEI afin qu'il reflète l'état under constant review by the IEC, thus ensuring that
actuel de la technique. Des renseignements relatifs à the content reflects current technology. Information
cette publication, y compris sa validité, sont dispo- relating to this publication, including its validity, is
nibles dans le Catalogue des publications de la CEI available in the IEC Catalogue of publications
(voir ci-dessous) en plus des nouvelles éditions, (see below) in addition to new editions, amendments
amendements et corrigenda. Des informations sur les and corrigenda. Information on the subjects under
sujets à l’étude et l’avancement des travaux entrepris consideration and work in progress undertaken by the
par le comité d’études qui a élaboré cette publication, technical committee which has prepared this
ainsi que la liste des publications parues, sont publication, as well as the list of publications issued,
également disponibles par l’intermédiaire de: is also available from the following:
• Site web de la CEI (www.iec.ch) • IEC Web Site (www.iec.ch)
• Catalogue des publications de la CEI • Catalogue of IEC publications
Le catalogue en ligne sur le site web de la CEI The on-line catalogue on the IEC web site
(www.iec.ch/searchpub) vous permet de faire des (www.iec.ch/searchpub) enables you to search by a
recherches en utilisant de nombreux critères, variety of criteria including text searches,
comprenant des recherches textuelles, par comité technical committees and date of publication. On-
d’études ou date de publication. Des informations en line information is also available on recently
ligne sont également disponibles sur les nouvelles issued publications, withdrawn and replaced
publications, les publications remplacées ou retirées, publications, as well as corrigenda.
ainsi que sur les corrigenda.
• IEC Just Published • IEC Just Published
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.
NORME CEI
INTERNATIONALE
IEC
60335-2-98
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2002-11
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-98:
Règles particulières pour les humidificateurs

Household and similar electrical appliances –
Safety –
Part 2-98:
Particular requirements for humidifiers

 IEC 2002 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
M
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

– 2 – 60335-2-98  CEI:2005
SOMMAIRE
AVANT-PROPOS.4
INTRODUCTION.8

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

Annexes .24

Bibliographie.24

60335-2-98  IEC:2005 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.9

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

Annexes .
...

IEC 60335-2-98
Edition 2.1 2005-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-98: Particular requirements for humidifiers

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-98: Règles particulières pour les humidificateurs

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by

any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or

IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

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et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.

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publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

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Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
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IEC 60335-2-98
Edition 2.1 2005-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-98: Particular requirements for humidifiers

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-98: Règles particulières pour les humidificateurs

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CD
CODE PRIX
ICS 97.030 ISBN 2-8318-8309-1
– 2 – 60335-2-98  CEI:2002+A1:2004

SOMMAIRE
AVANT-PROPOS.4

INTRODUCTION.8

1 Domaine d’application .10

2 Références normatives.10

3 Définitions .12

4 Exigences générales .12

5 Conditions générales d’essais .12
6 Classification.12
7 Marquage et instructions .12
8 Protection contre l’accès aux parties actives .14
9 Démarrage des appareils à moteur.14
10 Puissance et courant .14
11 Echauffements .16
12 Vacant.16
13 Courant de fuite et rigidité diélectrique à la température de régime .16
14 Surtensions transitoires.16
15 Résistance à l’humidité.18
16 Courant de fuite et rigidité diélectrique .18
17 Protection contre la surcharge des transformateurs et des circuits associés.18
18 Endurance.18
19 Fonctionnement anormal .18
20 Stabilité et dangers mécaniques .18
21 Résistance mécanique .20
22 Construction .20
23 Conducteurs internes .20
24 Composants .22
25 Raccordement au réseau et câbles souples extérieurs .22
26 Bornes pour conducteurs externes .22

27 Dispositions en vue de la mise à la terre .22
28 Vis et connexions .22
29 Distances dans l'air, lignes de fuite et isolation solide .22
30 Résistance à la chaleur et au feu.22
31 Protection contre la rouille.22
32 Rayonnement, toxicité et dangers analogues.22

Annexes .24

Bibliographie.24

60335-2-98 © IEC:2002+A1:2004 – 3 –

CONTENTS
FOREWORD.3

INTRODUCTION.9

1 Scope.11

2 Normative references.11

3 Definitions.13

4 General requirements .13

5 General conditions for the tests .13
6 Classification.13
7 Marking and instructions.13
8 Protection against access to live parts.15
9 Starting of motor-operated appliances .15
10 Power input and current .15
11 Heating.17
12 Void .17
13 Leakage current and electric strength at operating temperature.17
14 Transient overvoltages .17
15 Moisture resistance.19
16 Leakage current and electric strength.19
17 Overload protection of transformers and associated circuits .19
18 Endurance.19
19 Abnormal operation.19
20 Stability and mechanical hazards .19
21 Mechanical strength .21
22 Construction.21
23 Internal wiring.21
24 Components.23
25 Supply connection and external flexible cords .23
26 Terminals for external conductors.23

27 Provision for earthing .23
28 Screws and connections .23
29 Clearances, creepage distances and solid insulation .23
30 Resistance to heat and fire.23
31 Resistance to rusting.23
32 Radiation, toxicity and similar hazards.23

Annexes .25

Bibliography.25

– 4 –
...

IEC 60335-2-98 ®
Edition 2.2 2008-09
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-98: Particular requirements for humidifiers

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-98: Règles particulières pour les humidificateurs

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

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

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
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IEC 60335-2-98 ®
Edition 2.2 2008-09
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-98: Particular requirements for humidifiers

Appareils électrodomestiques et analogues – Sécurité –

Partie 2-98: Règles particulières pour les humidificateurs

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.030 ISBN 2-8318-9949-4
– 2 – 60335-2-98 © IEC:2002+A1:2004

+A2:2008
CONTENTS
FOREWORD.3

INTRODUCTION.5

1 Scope.6

2 Normative references.6

3 Definitions.7

4 General requirements .7

5 General conditions for the tests .7
6 Classification.7
7 Marking and instructions.7
8 Protection against access to live parts.8
9 Starting of motor-operated appliances .8
10 Power input and current .8
11 Heating.9
12 Void .9
13 Leakage current and electric strength at operating temperature.9
14 Transient overvoltages .9
15 Moisture resistance.10
16 Leakage current and electric strength.10
17 Overload protection of transformers and associated circuits .10
18 Endurance.10
19 Abnormal operation.10
20 Stability and mechanical hazards .10
21 Mechanical strength.11
22 Construction.11
23 Internal wiring.11
24 Components.12
25 Supply connection and external flexible cords .12
26 Terminals for external conductors.12

27 Provision for earthing .12
28 Screws and connections .12
29 Clearances, creepage distances and solid insulation .12
30 Resistance to heat and fire.12
31 Resistance to rusting.12
32 Radiation, toxicity and similar hazards.12

Annexes .

Bibliography.

60335-2-98 © IEC:2002+A1:2004 – 3 –

+A2:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-98: Particular requirements for humidifiers

FOREWORD
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