IEC 60669-2-4:2024
(Main)Switches for household and similar fixed electrical installations - Part 2-4: Particular requirements - Isolating switches
Switches for household and similar fixed electrical installations - Part 2-4: Particular requirements - Isolating switches
IEC 60669-2-4:2024 applies to manually operated general purpose isolating switches with a rated voltage not exceeding 440 V and a rated current not exceeding 125 A, intended for household and similar fixed electrical installations, either indoors or outdoors. This second edition cancels and replaces the first edition published in 2004. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) revision of the present edition with reference to the published IEC 60669-1:2017 Edition 4 with its amendments and references to clauses and tables;
b) introducing the values for isolating switches with ratings from 6 A to 13 A;
c) introducing a circuit motor load with a rated current not exceeding 10 A and a power factor not less than 0,6 in the scope;
d) modification of Table 1 and Table 5.
Interrupteurs pour installations électriques fixes domestiques et analogues - Partie 2-4: Exigences particulières - Interrupteurs-sectionneurs
L’IEC 60669-2-4:2024 s’applique aux interrupteurs-sectionneurs pour usage général manœuvrés manuellement, de tension assignée ne dépassant pas 440 V et de courant assigné ne dépassant pas 125 A, destinés aux installations électriques fixes domestiques et analogues intérieures ou extérieures. Cette deuxième édition annule et remplace la première édition parue en 2004, dont elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) Révision de la présente édition par rapport à la norme publiée IEC 60669-1:2017 Édition 4, avec ses amendements et références aux articles et tableaux.
b) Introduction des valeurs des interrupteurs-sectionneurs dont les caractéristiques assignées sont comprises entre 6 A et 13 A.
c) Introduction, dans le domaine d’application, d’un circuit de charge par moteur de courant assigné ne dépassant pas 10 A et de facteur de puissance d’au moins 0,6.
d) Modification du Tableau 1 et du Tableau 5.
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IEC 60669-2-4 ®
Edition 2.0 2024-03
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60669-2-4:2024 includes the content of the references made to
IEC 60669-1:2017
Switches for household and similar fixed electrical installations –
Part 2-4: Particular requirements – Isolating switches
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
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International Standards for all electrical, electronic and related technologies.
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IEC 60669-2-4 ®
Edition 2.0 2024-03
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60669-2-4:2024 includes the content of the references made to
IEC 60669-1:2017
Switches for household and similar fixed electrical installations –
Part 2-4: Particular requirements – Isolating switches
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.40 ISBN 978-2-8322-8543-5
– 2 – IEC 60669-2-4:2024 EXV © IEC 2024
CONTENTS
FOREWORD . 8
1 Scope . 11
2 Normative references . 12
3 Terms and definitions . 13
4 General requirements . 18
5 General remarks on tests . 18
6 Ratings . 21
6.1 Rated voltage . 21
6.2 Rated current . 21
6.3 Preferred combinations of number of poles and ratings . 21
6.101 Standard and preferred values of the rated conditional short-circuit current
(I ) . 22
nc
6.101.1 Values up to and including 10 000 A . 22
6.101.2 Values above 10 000 A . 22
7 Classification . 22
8 Marking . 24
8.1 General . 24
8.2 Symbols . 25
8.3 Visibility of markings . 26
8.4 Marking on terminals for phase conductors . 26
8.5 Marking on terminals for neutral and earth conductors . 27
8.6 Marking of the switch position . 27
8.7 Additional requirements for marking . 28
8.8 Durability . 28
9 Checking of dimensions . 28
10 Protection against electric shock . 28
10.1 Prevention of access to live parts. 28
10.2 Requirements for operating parts . 29
10.3 Requirements for accessible metal parts . 29
10.4 Requirements for insulation of the mechanism . 30
10.5 Requirements for insulation of the mechanism with respect to the
surrounding environment . 30
10.6 Requirements for switches operated indirectly . 30
10.7 Requirements for switches with replaceable pull cord . 31
11 Provision for earthing . 31
11.1 General . 31
11.2 Earthing terminals . 31
11.3 Requirements for surface-type switches . 31
11.4 Test for earthing connection . 31
12 Terminals . 32
12.1 General . 32
12.2 Terminals with screw clamping for external copper conductors . 32
12.3 Screwless terminals for external copper conductors . 38
13 Constructional requirements . 43
13.1 Mechanical requirements for insulating means . 43
13.2 Installation requirements . 44
13.3 Fixing of covers, cover plates and actuating members . 45
13.4 Openings in normal use . 46
13.5 Attachment of knobs . 46
13.6 Mounting means . 47
13.7 Combination of switches . 47
13.8 Accessories combined with switches . 47
13.9 Surface-type switches having an IP code higher than IP20 . 47
13.10 Installation in a box . 48
13.11 Connection of a second current-carrying conductor . 48
13.12 Inlet openings . 48
13.13 Provision for back entry from a conduit . 50
13.14 Switch provided with membranes or the like for inlet openings . 50
13.15 Requirements for membranes in inlet openings . 50
13.16 Pilot light units . 51
13.101 Indication of the contact position . 51
14 Mechanism . 51
14.1 Indication of the position . 51
14.2 Rest and intermediate position . 51
14.3 Undue arcing . 52
14.4 Making and breaking . 52
14.5 Action of the mechanism without cover or cover plate . 52
14.6 Pull force for cord-operated switches . 52
15 Resistance to ageing, protection provided by enclosures of switches and
resistance to humidity . 52
15.1 Resistance to ageing . 52
15.2 Protection provided by enclosures of switches . 53
15.2.1 General . 53
15.2.2 Protection against access to hazardous parts and against harmful
effects due to ingress of solid foreign objects . 53
15.2.3 Protection against harmful effects due to ingress of water . 54
15.3 Resistance to humidity . 55
16 Insulation resistance and electric strength . 56
16.1 General . 56
16.2 Test for measuring the insulation resistance . 56
16.3 Electric strength test . 58
16.101 Impulse voltage test . 59
17 Temperature rise . 60
17.1 General . 60
17.2 Switches incorporating pilot lights . 62
18 Making and breaking capacity . 62
18.1 General . 62
18.2 Overload . 63
18.3 Overload test with filament lamps . 64
18.101 Short-circuit withstand capability tests . 65
18.101.1 General . 65
18.101.2 General conditions for test . 65
18.101.3 Verification of the co-ordination between the isolating switch and the
SCPD . 68
19 Normal operation . 69
------------------
...
IEC 60669-2-4 ®
Edition 2.0 2024-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Switches for household and similar fixed electrical installations –
Part 2-4: Particular requirements – Isolating switches
Interrupteurs pour installations électriques fixes domestiques et analogues –
Partie 2-4: Exigences particulières – Interrupteurs-sectionneurs
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
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les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews, graphical symbols and the glossary.
committee, …). It also gives information on projects, replaced With a subscription you will always have access to up to date
and withdrawn publications. content tailored to your needs.
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details all new publications released. Available online and once
containing more than 22 500 terminological entries in English
a month by email.
and French, with equivalent terms in 25 additional languages.
Also known as the International Electrotechnical Vocabulary
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(IEV) online.
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IEC 60669-2-4 ®
Edition 2.0 2024-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Switches for household and similar fixed electrical installations –
Part 2-4: Particular requirements – Isolating switches
Interrupteurs pour installations électriques fixes domestiques et analogues –
Partie 2-4: Exigences particulières – Interrupteurs-sectionneurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.40 ISBN 978-2-8322-8332-5
– 2 – IEC 60669-2-4:2024 © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 7
5 General remarks on tests . 7
6 Ratings . 8
7 Classification . 9
8 Marking . 9
9 Checking of dimensions . 10
10 Protection against electric shock . 10
11 Provision for earthing . 10
12 Terminals . 10
13 Constructional requirements . 12
14 Mechanism . 13
15 Resistance to ageing, protection provided by enclosures of switches and
resistance to humidity . 13
16 Insulation resistance and electric strength . 13
17 Temperature rise . 14
18 Making and breaking capacity . 15
19 Normal operation . 19
20 Mechanical strength . 19
21 Resistance to heat . 19
22 Screws, current-carrying parts and connections . 20
23 Creepage distances, clearances and distances through sealing compound . 20
24 Resistance of insulating material to abnormal heat, to fire and to tracking . 21
25 Resistance to rusting . 21
26 EMC requirements . 21
Annexes . 28
Annex B (informative) Changes planned for the future in order to align IEC 60669-1
with the requirements of IEC 60998 (all parts), IEC 60999 (all parts) and IEC 60228 . 29
Annex AA (informative) Determination of short-circuit power factor . 30
Annex BB (informative) SCPDs for short-circuit tests . 32
Bibliography . 34
Figure 101 – Test circuit for verification of the short-circuit withstand capability with an
SCPD of one-pole isolating switch . 23
Figure 102 – Test circuit for verification of the short-circuit withstand capability with an
SCPD of a two-pole isolating switch . 24
Figure 103 – Test circuit for verification of the short-circuit withstand capability with an
SCPD of a three-pole isolating switch . 25
Figure 104 – Test circuit for verification of the short-circuit withstand capability with an
SCPD of a four-pole isolating switch . 26
Figure 105 – Test apparatus for verification of the minimum I t and I values to be
p
withstood by the isolating switch . 27
Table 1 – Number of specimens needed for the tests . 7
Table 4 – Relationship between rated currents and connectable cross-sectional areas
of copper conductors . 11
Table 5 – Tightening torque for verification of the mechanical strength of screw-type
terminals . 11
Table 6 – Test values for flexion and pull out for copper conductors . 12
Table 7 – Test values for pulling out test . 12
Table 13 – External cable diameter limits for surface type switches . 12
Table 101 – Test voltage and corresponding altitudes . 14
Table 16 – Temperature-rise test currents and cross-sectional areas of copper
conductors . 14
Table 102 – Minimum values of I t and I . 16
p
Table 103 – Power factors for short-circuit tests . 17
Table 18 – Number of operations for normal operation test . 19
Table 23 – Creepage distances, clearances and distances through insulating sealing
compound . 20
Table BB.1 – Indication of silver wire diameters as a function of rated currents and
short-circuit currents . 32
– 4 – IEC 60669-2-4:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SWITCHES FOR HOUSEHOLD AND SIMILAR
FIXED ELECTRICAL INSTALLATIONS –
Part 2-4: Particular requirements –
Isolating switches
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
...
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