IEC 61140:2016
(Main)Protection against electric shock - Common aspects for installation and equipment
Protection against electric shock - Common aspects for installation and equipment
IEC 61140:2016 applies to the protection of persons and livestock against electric shock. The intent is to give fundamental principles and requirements which are common to electrical installations, systems and equipment or necessary for their coordination, without limitations with regard to the magnitude of the voltage or current, or the type of current, and for frequencies up to 1 000 Hz. It has the status of a basic safety publication in accordance with IEC Guide 104. This fourth edition cancels and replaces the third edition published in 2001 and Amendment 1:2004. This edition constitutes a technical revision.
Protection contre les chocs électriques - Aspects communs aux installations et aux matériels
L'IEC 61140:2016 est applicable à la protection des personnes et des animaux d'élevage contre les chocs électriques. Elle est destinée à donner des principes fondamentaux et des exigences communes aux installations, aux systèmes et aux matériels électriques, ou nécessaires à leur coordination sans limitation en ce qui concerne l'amplitude de tension ou de courant, ou le type de courant, et pour des fréquences jusqu'à 1 000 Hz. Elle a le statut d'une publication fondamentale de sécurité conformément au Guide IEC 104. Cette quatrième édition annule et remplace la troisième édition parue en 2001 et l'Amendement 1:2004. Cette édition constitue une révision technique.
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IEC 61140 ®
Edition 4.0 2016-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
BASIC SAFETY PUBLICATION
Protection against electric shock – Common aspects for installations and
equipment
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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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.
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IEC 61140 ®
Edition 4.0 2016-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
BASIC SAFETY PUBLICATION
Protection against electric shock – Common aspects for installations and
equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.260; 29.020; 91.140.50 ISBN 978-2-8322-3132-6
– 2 – IEC 61140:2016 RLV © IEC 2016
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
4 Fundamental rule of protection against electric shock . 20
4.1 General . 20
4.2 Normal conditions . 20
4.3 Single-fault conditions . 21
4.3.1 General . 21
4.3.2 Protection by two independent protective provisions . 22
4.3.3 Protection by an enhanced protective provision . 22
4.4 Special cases Additional protection . 22
4.5 Protection against electric burns . 22
4.6 Protection against physiological effects without adverse health effect . 23
4.6.1 General . 23
4.6.2 Muscular reaction . 23
4.6.3 Effects of touch current of discharge of electrostatic charges . 23
4.6.4 Thermal effects . 23
5 Protective provisions (elements of protective measures) . 24
5.1 General . 24
5.2 Provisions for basic protection . 24
5.2.1 General . 24
5.2.2 Basic insulation . 24
5.2.3 Protective barriers or enclosures . 24
5.2.4 Obstacles . 25
5.2.5 Placing out of arm's reach . 25
5.2.6 Limitation of voltage . 26
5.2.7 Limitation of steady-state touch current and charge energy . 26
5.2.8 Potential grading . 27
5.2.9 Other provisions for basic protection . 27
5.3 Provisions for fault protection . 27
5.3.1 General . 27
5.3.2 Supplementary insulation . 27
5.3.3 Protective-equipotential-bonding . 27
5.3.4 Protective screening . 29
5.3.5 Indication and disconnection in high-voltage installations and systems . 29
5.3.6 Automatic disconnection of supply . 30
5.3.7 Simple separation (between circuits) . 30
5.3.8 Non-conducting environment . 30
5.3.9 Potential grading . 30
5.3.10 Other provisions for fault protection . 31
5.4 Enhanced protective provisions. 31
5.4.1 General . 31
5.4.2 Reinforced insulation . 31
5.4.3 Protective separation between circuits . 31
5.4.4 Limited current source . 31
5.4.5 Protective impedance device . 32
5.4.6 Other provisions for enhanced protection . 32
5.5 Provisions for additional protection . 32
5.5.1 Additional protection by residual current protective device (RCD)
I∆ ≤ 30 mA . 32
n
5.5.2 Additional protection by supplementary equipotential bonding . 32
6 Protective measures . 33
6.1 General . 33
6.2 Protection by automatic disconnection of supply . 33
6.3 Protection by double or reinforced insulation . 33
6.4 Protection by protective equipotential bonding . 33
6.5 Protection by electrical separation . 33
6.6 Protection by non-conducting environment (low-voltage) . 34
6.7 Protection by SELV system . 34
6.8 Protection by PELV system . 34
6.9 Protection by limitation of steady-state touch current and charge . 34
6.10 Additional protection . 35
6.10.1 Additional protection by residual current protective device (RCD)
I∆ ≤ 30 mA . 35
n
6.10.2 Additional protection by supplementary protective equipotential bonding . 35
6.11 Protection by other measures . 35
7 Co-ordination of between electrical equipment and of protective provisions within
an electrical installation . 35
7.1 General . 35
7.2 Class 0 equipment . 36
7.1.1 Insulation .
7.3 Class I equipment . 37
7.3.1 General . 37
7.3.2 Insulation . 37
7.3.3 Protective-equipotential-bonding Connection to the protective conductor . 37
7.3.4 Accessible surfaces of parts of insulating material . 37
7.3.5 Connection of a protective conductor . 38
7.4 Class II equipment . 38
7.4.1 General . 38
7.4.2 Insulation . 38
7.4.3 Protective bonding . 39
7.4.4 Marking . 39
7.5 Class III equipment . 39
7.5.1 General . 39
7.5.2 Voltages . 40
7.5.3 Protective bonding . 40
7.5.4 Marking . 40
7.6 Touch currents, protective conductor currents, leakage currents . 40
7.6.1 General . 40
7.6.2 Touch currents . 40
7.6.3 Protective conductor currents . 41
7.6.4 Other requirements . 43
7.6.5 Other effects . 43
– 4 – IEC 61140:2016 RLV © IEC 2016
7.7 Safety and boundary clearances and warning labels hazard marking for
high-voltage installations .
...
IEC 61140 ®
Edition 4.0 2016-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Protection against electric shock – Common aspects for installations and
equipment
Protection contre les chocs électriques – Aspects communs aux installations et
aux matériels
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
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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IEC 61140 ®
Edition 4.0 2016-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Protection against electric shock – Common aspects for installations and
equipment
Protection contre les chocs électriques – Aspects communs aux installations et
aux matériels
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.260; 29.020; 91.140.50 ISBN 978-2-8322-3103-6
– 2 – IEC 61140:2016 © IEC 2016
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Fundamental rule of protection against electric shock . 18
4.1 General . 18
4.2 Normal conditions . 19
4.3 Single-fault conditions . 20
4.3.1 General . 20
4.3.2 Protection by independent protective provisions . 20
4.3.3 Protection by an enhanced protective provision . 20
4.4 Additional protection . 20
4.5 Protection against electric burns . 21
4.6 Protection against physiological effects without adverse health effect . 21
4.6.1 General . 21
4.6.2 Muscular reaction . 21
4.6.3 Effects of touch current of discharge of electrostatic charges . 22
4.6.4 Thermal effects . 22
5 Protective provisions (elements of protective measures) . 22
5.1 General . 22
5.2 Provisions for basic protection . 22
5.2.1 General . 22
5.2.2 Basic insulation . 22
5.2.3 Protective barriers or enclosures . 23
5.2.4 Obstacles . 23
5.2.5 Placing out of arm's reach . 23
5.2.6 Limitation of voltage . 24
5.2.7 Limitation of steady-state touch current and energy . 24
5.2.8 Potential grading . 25
5.2.9 Other provisions for basic protection . 25
5.3 Provisions for fault protection . 25
5.3.1 General . 25
5.3.2 Supplementary insulation . 25
5.3.3 Protective-equipotential-bonding . 25
5.3.4 Protective screening . 27
5.3.5 Indication and disconnection in high-voltage installations and systems . 27
5.3.6 Automatic disconnection of supply . 27
5.3.7 Simple separation (between circuits) . 28
5.3.8 Non-conducting environment . 28
5.3.9 Potential grading . 28
5.3.10 Other provisions for fault protection . 28
5.4 Enhanced protective provisions. 28
5.4.1 General . 28
5.4.2 Reinforced insulation . 29
5.4.3 Protective separation between circuits . 29
5.4.4 Limited current source . 29
5.4.5 Protective impedance device . 29
5.4.6 Other provisions for enhanced protection . 30
5.5 Provisions for additional protection . 30
5.5.1 Additional protection by residual current protective device (RCD)
I∆ ≤ 30 mA . 30
n
5.5.2 Additional protection by supplementary equipotential bonding . 30
6 Protective measures . 30
6.1 General . 30
6.2 Protection by automatic disconnection of supply . 31
6.3 Protection by double or reinforced insulation . 31
6.4 Protection by protective equipotential bonding . 31
6.5 Protection by electrical separation . 31
6.6 Protection by non-conducting environment (low-voltage) . 31
6.7 Protection by SELV system . 32
6.8 Protection by PELV system . 32
6.9 Protection by limitation of steady-state touch current and charge . 32
6.10 Additional protection . 32
6.10.1 Additional protection by residual current protective device (RCD)
I∆ ≤ 30 mA . 32
n
6.10.2 Additional protection by supplementary protective equipotential bonding . 32
6.11 Protection by other measures . 33
7 Co-ordination between electrical equipment and protective provisions within an
electrical installation . 33
7.1 General .
...
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