IEC 61535:2023
(Main)Installation couplers intended for permanent connection in fixed installations
Installation couplers intended for permanent connection in fixed installations
IEC 61535:2023 applies to two-wire, up to five-wire installation couplers, with or without earthing contact, if provided, with a rated voltage up to and including 500 V AC or 500 V DC and a rated connecting capacity up to and including 10 mm2 and a rated current not exceeding 32 A for permanent connection in electrical installations. Installation couplers with additional contacts for voltages other than mains voltages are outside the scope of this document. This third edition cancels and replaces the second edition published in 2019. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) inclusion of a definition for "live part" based on IEC 61140;
b) additional optional cross medial documentation, e.g. marking with QR-Code;
c) corrections on the consistent use of the expressions "earth", "earthing contact", "earthing circuit" and "protective earth(ing)" throughout the document;
d) addition of missing compliance provisions to 13.3;
e) update of Figure D.1 of Annex D;
f) inclusion of new Annex F for cold climate requirements.
Coupleurs d'installation pour connexions permanentes dans les installations fixes
L'IEC 61535:2023 s'applique aux coupleurs d'installation qui comportent deux à cinq conducteurs, avec ou sans contact de terre (le cas échéant), de tension continue ou alternative assignée jusqu'à 500 V inclus et de capacité assignée de connexion jusqu'à 10 mm2 inclus, avec un courant assigné qui ne dépasse pas 32 A, pour connexion permanente dans les installations électriques. Les coupleurs d'installation avec des contacts supplémentaires pour des tensions autres que la tension d'alimentation du réseau ne relèvent pas du domaine d'application du présent document. Cette troisième édition annule et remplace la deuxième édition parue en 2019. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) inclusion d'une définition issue de l'IEC 61140 pour "partie active";
b) documentation facultative supplémentaire disponible sur plusieurs supports, par exemple marquage avec QR code;
c) corrections relatives à l'utilisation cohérente des expressions "terre", "contact de terre", "circuit de terre" et "(mise à la) terre de protection" dans l'ensemble du document;
d) ajout de dispositions de conformité manquantes au 13.3;
e) mise à jour de la Figure D.1 de l'Annexe D;
f) ajout d'une nouvelle Annexe F pour les exigences relatives aux climats froids.
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IEC 61535 ®
Edition 3.0 2023-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Installation couplers intended for permanent connection in fixed installations
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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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.
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IEC 61535 ®
Edition 3.0 2023-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Installation couplers intended for permanent connection in fixed installations
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.99 ISBN 978-2-8322-6728-8
– 2 – IEC 61535:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 6
INTRODUCTION . 2
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 General requirements . 12
5 Conditions for tests . 13
5.1 General . 13
5.2 Test conditions . 13
5.3 Tests on non-rewirable installation couplers . 13
5.4 Order of tests . 13
5.5 Specification of tests . 13
5.6 Compliance requirements . 13
5.7 Routine tests for non-rewirable installation couplers . 14
6 Ratings . 14
6.1 Rated voltage . 14
6.2 Rated current . 14
6.3 Rated connecting capacity . 15
6.4 Tests . 15
7 Classification . 15
8 Marking and documentation . 16
8.1 General . 16
8.2 Use of symbols or letters . 16
8.3 Markings . 16
8.4 Documentation . 17
9 Dangerous compatibility . 18
9.1 Unintended or improper connection . 18
9.2 Engagement . 18
9.3 Compatibility of different installation coupler systems . 18
9.4 Compatibility with standard systems . 19
10 Protection against electric shock . 19
10.1 Degree of protection against ingress of solid foreign objects . 19
10.2 Access to live parts . 19
10.3 External parts . 19
11 Terminals, terminations and connectable conductors . 20
11.1 Terminals and terminations . 20
11.1.1 General . 20
11.1.2 Terminals of rewirable installation couplers . 20
11.1.3 Terminations of non-rewirable installation couplers . 20
11.2 Connectable conductors. 20
12 Construction . 21
12.1 Earth Connection between earthing contacts . 21
12.2 Locking against rotation . 21
12.3 Mechanical strength of contacts . 21
12.4 Housing of rewirable installation couplers . 22
12.5 Housing of non-rewirable installation couplers . 22
12.6 Dismantling and opening of rewirable installation couplers . 22
12.7 Earthing contact and earthing terminal . 22
12.8 Loose conductor strands . 22
12.8.1 General . 22
12.8.2 Strand test for rewirable installation couplers . 23
12.8.3 Strand test for non-rewirable non-molded-on installation couplers . 23
12.8.4 Strand test for non-rewirable moulded-on installation couplers . 23
12.9 Incorporation of electrical devices . 24
12.10 Retaining means . 24
12.11 Distribution blocks . 24
12.12 Shrouds . 24
12.13 Factory wiring . 24
12.14 Stress test . 24
12.14.1 General . 24
12.14.2 Stress test of rewirable installation couplers . 24
12.14.3 Stress test of non-rewirable installation couplers . 25
12.15 Separation of non-rewirable installation couplers . 25
13 Protection against harmful ingress of solid foreign objects and against harmful
ingress of water . 25
13.1 General . 25
13.2 Protection against harmful ingress of solid foreign objects . 25
13.3 Protection against harmful ingress of water . 25
14 Insulation resistance and electric strength . 26
14.1 General . 26
14.2 Insulation resistance . 26
14.3 Electric strength . 27
15 Construction of contacts . 27
15.1 Resiliency . 27
15.2 Resistance of connections . 27
15.3 Contact pressure . 28
16 Temperature rise . 28
17 Breaking capacity . 29
18 Forces necessary to disengage the parts of the installation coupler . 30
19 Cables and their connection . 30
19.1 Capability of being fitted . 30
19.2 Relief from pull, thrust and torsion . 30
19.3 Relief Cable anchorage . 30
19.4 Capability to connect cables with different cross-sectional area . 31
19.5 Sharp edges . 33
20 Mechanical strength . 33
21 Resistance to heat and ageing. 34
21.1 Resistance to heat . 34
21.2 Dry heat storage . 34
21.3 Ball pressure test . 34
21.4 Ageing of elastomeric and thermoplastic material . 35
21.5 Current cycling test . 35
22 Screws, current-carrying parts and connections . 36
– 4 – IEC 61535:2023 RLV © IEC 2023
22.1 Screws and nuts . 36
22.2 Screws and insulating material . 37
22.3 Screws and rivets for electrical and mechanical connectio
...
IEC 61535 ®
Edition 3.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Installation couplers intended for permanent connection in fixed installations
Coupleurs d'installation pour connexions permanentes dans les installations
fixes
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
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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. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
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IEC 61535 ®
Edition 3.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Installation couplers intended for permanent connection in fixed installations
Coupleurs d'installation pour connexions permanentes dans les installations
fixes
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.99 ISBN 978-2-8322-6700-4
– 2 – IEC 61535:2023 © IEC 2023
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 General requirements . 12
5 Conditions for tests . 13
5.1 General . 13
5.2 Test conditions . 13
5.3 Tests on non-rewirable installation couplers . 13
5.4 Order of tests . 13
5.5 Specification of tests . 13
5.6 Compliance requirements . 13
5.7 Routine tests for non-rewirable installation couplers . 14
6 Ratings . 14
6.1 Rated voltage . 14
6.2 Rated current . 14
6.3 Rated connecting capacity . 15
6.4 Tests . 15
7 Classification . 15
8 Marking and documentation . 16
8.1 General . 16
8.2 Use of symbols or letters . 16
8.3 Markings . 16
8.4 Documentation . 17
9 Dangerous compatibility . 18
9.1 Unintended or improper connection . 18
9.2 Engagement . 18
9.3 Compatibility of different installation coupler systems . 18
9.4 Compatibility with standard systems . 18
10 Protection against electric shock . 19
10.1 Degree of protection against ingress of solid foreign objects . 19
10.2 Access to live parts . 19
10.3 External parts . 19
11 Terminals, terminations and connectable conductors . 19
11.1 Terminals and terminations . 19
11.1.1 General . 19
11.1.2 Terminals of rewirable installation couplers . 20
11.1.3 Terminations of non-rewirable installation couplers . 20
11.2 Connectable conductors. 20
12 Construction . 21
12.1 Connection between earthing contacts . 21
12.2 Locking against rotation . 21
12.3 Mechanical strength of contacts . 21
12.4 Housing of rewirable installation couplers . 21
12.5 Housing of non-rewirable installation couplers . 22
12.6 Dismantling and opening of rewirable installation couplers . 22
12.7 Earthing contact and earthing terminal . 22
12.8 Loose conductor strands . 22
12.8.1 General . 22
12.8.2 Strand test for rewirable installation couplers . 23
12.8.3 Strand test for non-rewirable non-molded-on installation couplers . 23
12.8.4 Strand test for non-rewirable moulded-on installation couplers . 23
12.9 Incorporation of electrical devices . 23
12.10 Retaining means . 24
12.11 Distribution blocks . 24
12.12 Shrouds . 24
12.13 Factory wiring . 24
12.14 Stress test . 24
12.14.1 General . 24
12.14.2 Stress test of rewirable installation couplers . 24
12.14.3 Stress test of non-rewirable installation couplers . 25
12.15 Separation of non-rewirable installation couplers . 25
13 Protection against harmful ingress of solid foreign objects and against harmful
ingress of water . 25
13.1 General . 25
13.2 Protection against harmful ingress of solid foreign objects . 25
13.3 Protection against harmful ingress of water . 25
14 Insulation resistance and electric strength . 26
14.1 General . 26
14.2 Insulation resistance . 26
14.3 Electric strength . 26
15 Construction of contacts . 27
15.1 Resiliency .
...
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