EN 60335-2-21:2003

SLOVENSKI STANDARD
01-september-2003
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SIST EN 60335-2-21:2000
SIST EN 60335-2-21:2000/A1:2001
SIST EN 60335-2-21:2000/A11:2002
SIST EN 60335-2-21:2000/A12:2003
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Household and similar electrical appliances - Safety -- Part 2-21: Particular requirements
for storage water heaters
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke -- Teil 2-21:
Besondere Anforderungen für Wassererwärmer (Warmwasserspeicher und
Warmwasserboiler)
Appareils électrodomestiques et analogues - Sécurité -- Partie 2-21: Règles particulières
pour les chauffe-eau à accumulation
Ta slovenski standard je istoveten z: EN 60335-2-21:2003
ICS:
13.120 Varnost na domu Domestic safety
91.140.65 Oprema za ogrevanje vode Water heating equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60335-2-21
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2003
ICS 91.140.65; 13.120 Supersedes EN 60335-2-21:1999 + A1:2000 + A11:2002 + A12:2002
Incorporates Corrigenda October 2007 and October 2010

English version
Household and similar electrical appliances -
Safety
Part 2-21: Particular requirements for storage water heaters
(IEC 60335-2-21:2002, modified)

Appareils électrodomestiques  Sicherheit elektrischer Geräte für den
et analogues - Hausgebrauch und ähnliche Zwecke
Sécurité Teil 2-21: Besondere Anforderungen für
Partie 2-21: Règles particulières Wassererwärmer (Warmwasserspeicher
pour les chauffe-eau à accumulation und Warmwasserboiler)
(CEI 60335-2-21:2002, modifiée) (IEC 60335-2-21:2002, modifiziert)

This European Standard was approved by CENELEC on 2003-03-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60335-2-21:2003 E
Foreword
The text of document 61/2135/FDIS, future fifth edition of IEC 60335-2-21, prepared by the IEC Technical
Committee 61, was submitted to the IEC-CENELEC parallel vote.
As a result of the Kista meeting of CENELEC TC 61 in May 2002, a draft amendment prAA containing the
relevant existing common modifications was submitted to the formal vote.
The texts of the FDIS and the prAA were approved by CENELEC as a new edition of EN 60335-2-21 on
2003-03-01.
This European Standard replaces EN 60335-2-21:1999 + A1:2000 + A11:2002 + A12:2002.
The following dates are applicable:
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2004-03-01
- date on which national standards
conflicting with the EN have to be withdrawn (dow) 2006-03-01
This part 2 has to be used in conjunction with EN 60335-1, Household and similar electrical appliances –
Safety – Part 1: General requirements. It was established on the basis of the 2002 edition of that standard.
Amendments and revisions of Part 1 have also to be taken into account and the dates when such
changes become applicable will be stated in the relevant amendment or revision of Part 1.
This part 2 supplements or modifies the corresponding clauses of EN 60335-1, so as to convert it into the
European Standard: Safety requirements for electric storage water heaters.
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 of
Part 1 is to be adapted accordingly.
NOTE 1 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.;
- subclauses, notes and annexes that are additional to those in the IEC standard are prefixed with the letter Z.
NOTE 2 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.
Special national conditions causing a deviation from this European Standard are listed in Annex ZA and
are in addition to those in EN 60335-1.
National deviations from this European Standard are listed in Annex ZB and are in addition to those in
EN 60335-1.
p NOTE  In this document, p is used in the margin to indicate instructions for preparing the printed version.
The contents of the corrigenda of October 2007 and October 2010 have been included in this copy.
_____________
- 3 - EN 60335-2-21:2003
Introduction
p Add:
An investigation by CENELEC TC 61 has shown that all risks from products within the scope of this
standard are fully covered by the Low Voltage Directive, 73/23/EEC. For products having mechanical
moving parts, a risk assessment in accordance with the Machinery Directive, 98/37/EC, has shown that
the risks are mainly of electrical origin and consequently this directive is not applicable. However, the
relevant essential safety requirements of the Machinery Directive are covered by this standard together
with the principal objectives of the Low Voltage Directive.
____________
Endorsement notice
The text of the International Standard IEC 60335-2-21:2002 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
24 Components
p 24.102 Replace the text by:
The operating temperature of the thermal cut-out of a closed water heater shall ensure that the water
temperature cannot exceed 99 °C or the thermal cut-out operates before its temperature exceeds
110 °C.
Compliance is checked by the test of 24.102.1 for water temperatures not exceeding 99 °C or by the test
of 24.102.2 for thermal cut-outs having an operating temperature up to 110 °C.
p 24.102.2 Replace the text by:
The operating temperature of the thermal cut-out is measured by means of a thermocouple positioned
on its sensing element or as close as possible to it.
The appliance is operated under normal operation at rated power input with the outlet valve closed and
thermostats short-circuited until the thermal cut-out operates.
The thermal cut-out shall operate before its temperature exceeds 110 °C.
During the test, compliance with 19.13 shall not be impaired.
__________
p Add:
Annex ZA
(normative)
Special national conditions
Addition:
Clause Special national condition
22.101 Denmark, Finland, Norway and Sweden
For closed water heaters, the minimum rated pressure is 1,0 MPa.
22.102 Denmark (Instruction AT 2.1.2-4, 1994 and AT Instruction B.4.8)
Cold water inlets on the heated storage water heater, the safety valve and the blow out
piping shall have a clear flow diameter of at least Ø 20 mm.

Annex ZB
(informative)
A-deviations
Addition:
Clause Deviation
24.101 United Kingdom (Building Regulation Part G3)
In addition to a non-self-resetting thermal cut-out, any closed water heater having a
storage capacity in excess of 15 l shall be fitted with a temperature relief valve according
to BS 6283 Part 2 or a combined temperature and pressure relief valve according to BS 6283
Part 3.
24.102 United Kingdom (Building Regulation Part G3)
The water temperature of the stored water shall not at any time exceed 99 °C in closed water
heaters having a storage capacity in excess of 15 l.
__________
INTERNATIONAL IEC
STANDARD
60335-2-21
Fifth edition
2002-07
Household and similar electrical appliances –
Safety –
Part 2-21:
Particular requirements for storage water heaters
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-21:
Règles particulières pour les chauffe-eau à accumulation
 IEC 2002  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
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S
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 60335-2-21  IEC:2002(E)
CONTENTS
FOREWORD . 3
INTRODUCTION .6
1 Scope . 7
2 Normative references. 7
3 Definitions . 7
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 Void .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.11
20 Stability and mechanical hazards.12
21 Mechanical strength.12
22 Construction .12
23 Internal wiring.15
24 Components .15
25 Supply connection and external flexible cords.16
26 Terminals for external conductors .16
27 Provision for earthing.16
28 Screws and connections .16
29 Clearances, creepage distances and solid insulation .16
30 Resistance to heat and fire .16
31 Resistance to rusting .16
32 Radiation, toxicity and similar hazards .17
Annexes.
...