IEC 60364-5-55:2011

Electrical installations of buildings - Part 5-55: Selection and erection of electrical equipment - Other equipment

IEC 60364-5-55:2011 covers requirements for the selection and erection of low-voltage generating sets and for the selection and erection of luminaires and lighting installations intended to be part of the fixed installation. This second edition cancels and replaces the first edition, published in 2001, its Amendment 1 (2001) and its Amendment 2 (2008). The major technical changes with respect to the previous edition are:
- additional requirements for connection of luminaires to the fixed wiring;
- modification of requirements regarding the fixing of luminaires;
- inclusion of alternative solutions for connecting devices used for through wiring and for connection of luminaires to the supply;
- withdrawal of Clause 556, as IEC 60364-5-56 now covers this matter.

Installations électriques des bâtiments - Partie 5-55: Choix et mise en oeuvre des matériels électriques - Autres matériels

La CEI 60364-5-55:2011 couvre les exigences pour le choix et la mise en oeuvre des groupes générateurs basse tension et est applicable au choix et à la mise en oeuvre des luminaires et des installations d'éclairage destinés à faire partie de l'installation fixe. Cette seconde édition annule et remplace la première édition, publiée en 2001, son Amendement 1 (2001) et son Amendement 2 (2008). Les modifications principales par rapport à l'édition précédente sont:
- des exigences supplémentaires pour la connexion des luminaires à l'installation fixe;
- des modifications d'exigences concernant la fixation des luminaires;
- l'ajout de solutions alternatives pour les dispositifs de connexion utilisés pour le câblage passant et pour la connexion de luminaires au réseau d'alimentation;
- la suppression de l'Article 556, maintenant couvert par CEI 60364-5-56.

General Information

• Status: Published
• Publication Date: 13-Dec-2011
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: TC 64 - Electrical installations and protection against electric shock
• Drafting Committee: MT 2 - TC 64/MT 2
• Current Stage: PPUB - Publication issued
• Start Date: 15-Jan-2012
• Completion Date: 14-Dec-2011

Relations

• Amended By: IEC 60364-5-55:2011/AMD2:2016 - Amendment 2 - Electrical installations of buildings - Part 5-55: Selection and erection of electrical equipment - Other equipment
• Effective Date: 05-Sep-2023
• Amended By: IEC 60364-5-55:2011/AMD1:2012 - Amendment 1 - Electrical installations of buildings - Part 5-55: Selection and erection of electrical equipment - Other equipment
• Effective Date: 05-Sep-2023
• Revises: IEC 60364-5-55:2001 - Electrical installations of buildings - Part 5-55: Selection and erection of electrical equipment - Other equipment
• Effective Date: 05-Sep-2023
• Revises: IEC 60364-5-55:2001/AMD2:2008 - Amendment 2 - Electrical installations of buildings - Part 5-55: Selection and erection of electrical equipment - Other equipment
• Effective Date: 05-Sep-2023
• Revises: IEC 60364-5-55:2001/AMD1:2001 - Amendment 1 - Electrical installations of buildings - Part 5-55: Selection and erection of electrical equipment - Other equipment
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60364-5-55 ®
Edition 2.0 2011-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical installations of buildings –
Part 5-55: Selection and erection of electrical equipment – Other equipment

Installations électriques des bâtiments –
Partie 5-55: Choix et mise en œuvre des matériels électriques – Autres 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 la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

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International Standards for all electrical, electronic and related technologies.

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IEC 60364-5-55 ®
Edition 2.0 2011-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical installations of buildings –
Part 5-55: Selection and erection of electrical equipment – Other equipment

Installations électriques des bâtiments –
Partie 5-55: Choix et mise en œuvre des matériels électriques – Autres matériels

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 91.140 ISBN 978-2-88912-845-7

– 2 – 60364-5-55 © IEC:2011
CONTENTS
FOREWORD . 3
550 Introduction . 5
550.1 Scope . 5
550.2 Normative references . 5
550.3 Terms and definitions . 6
551 Low-voltage generating sets . 7
551.1 Scope . 7
551.2 General requirements . 8
551.3 Protective measure: extra-low-voltage provided by SELV and PELV . 9
551.4 Fault protection (protection against indirect contact) . 9
551.5 Protection against overcurrent . 10
551.6 Additional requirements for installations where the generating set
provides a supply as a switched alternative to the normal supply to the
installation . 11
551.7 Additional requirements for installations where the generating set may
operate in parallel with other sources including systems for distribution
of electricity to the public . 11
551.8 Requirements for installations incorporating stationary batteries . 12
559 Luminaires and lighting installations . 13
559.1 Scope . 13
559.2 Terms and definitions . 13
559.3 General requirements for installations . 14
559.4 Protection of the surroundings against thermal effects . 14
559.5 Wiring systems for lighting installations . 14
559.6 Independent lamp controlgear, e.g. ballasts . 16
559.7 Compensation capacitors . 16
559.8 Protection against electric shock for display stands for luminaires . 16
559.9 Stroboscopic effect . 16
559.10 Ground recessed luminaires . 17
Annex A (informative) List of notes concerning certain countries . 18
Annex B (informative) Explanation of symbols used in luminaires, in controlgear for
luminaires and in the installation of the luminaires . 24
Bibliography . 26

60364-5-55 © IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_______________
ELECTRICAL INSTALLATIONS OF BUILDINGS –

Part 5-55: Selection and erection of electrical equipment –
Other equipment
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.
International Standard IEC 60364-5-55 has been prepared by IEC technical committee 64:
Electrical installations and protection against electric shock.
This second edition cancels and replaces the first edition, published in 2001, its Amendment 1
(2001) and its Amendment 2 (2008).
The major technical changes with respect to the previous edition are listed below:
– additional requirements for connection of luminaires to the fixed wiring;
– modification of requirements regarding the fixing of luminaires;
– inclusion of alternative solutions for connecting devices used for through wiring and for
connection of luminaires to the supply;
– withdrawal of Clause 556, as IEC 60364-5-56 now covers this matter.

– 4 – 60364-5-55 © IEC:2011
The text of this standard is based on the following documents:
FDIS Report on voting
64/1805/FDIS 64/1813/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60364 series, under the general title Low-voltage electrical
installations, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.
60364-5-55 © IEC:2011 – 5 –
ELECTRICAL INSTALLATIONS OF BUILDINGS –

Part 5-55: Selection and erection of electrical equipment –
Other equipment
550 Introduction
550.1 Scope
This part of IEC 60364 covers requirements for the selection and erection of low-voltage
generating sets and for the selection and erection of luminaires and lighting installations
intended to be part of the fixed installation.
550.2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest ed
...

IEC 60364-5-55 ®
Edition 2.1 2012-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical installations of buildings –
Part 5-55: Selection and erection of electrical equipment – Other equipment

Installations électriques des bâtiments –
Partie 5-55: Choix et mise en oeuvre des matériels électriques – Autres 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 la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
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.

Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.

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details all new publications released. Available on-line and or need further assistance, please contact the
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A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
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Liens utiles:
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La recherche avancée vous permet de trouver des Le premier dictionnaire en ligne au monde de termes
publications CEI en utilisant différents critères (numéro de électroniques et électriques. Il contient plus de 30 000
référence, texte, comité d’études,…). termes et définitions en anglais et en français, ainsi que
Elle donne aussi des informations sur les projets et les les termes équivalents dans les langues additionnelles.
publications remplacées ou retirées. Egalement appelé Vocabulaire Electrotechnique
International (VEI) en ligne.
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Disponible en ligne et aussi une fois par mois par email. cette publication ou si vous avez des questions
contactez-nous: [e-mail].
IEC 60364-5-55 ®
Edition 2.1 2012-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical installations of buildings –

Part 5-55: Selection and erection of electrical equipment – Other equipment

Installations électriques des bâtiments –

Partie 5-55: Choix et mise en oeuvre des matériels électriques – Autres matériels

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX CM
ICS 91.140 ISBN 978-2-8322-0426-9

– 2 – 60364-5-55 © IEC:2011+A1:2012
CONTENTS
FOREWORD . 4
550 Introduction . 6
550.1 Scope . 6
550.2 Normative references . 6
550.3 Terms and definitions . 8
551 Low-voltage generating sets . 8
551.1 Scope . 8
551.2 General requirements .9
551.3 Protective measure: extra-low-voltage provided by SELV and PELV . 10
551.4 Fault protection (protection against indirect contact) . 10
551.5 Protection against overcurrent . 11
551.6 Additional requirements for installations where the generating set provides
a supply as a switched alternative to the normal supply to the installation . 12
551.7 Additional requirements for installations where the generating set may operate
in parallel with other sources including systems for distribution of electricity
to the public . 12
551.8 Requirements for installations incorporating stationary batteries . 14
557 Auxiliary circuits . 14
557.1 Scope . 14
557.2 Terms and definitions . 14
557.3 Requirements for auxiliary circuits . 15
557.4 Characteristics of cables and conductors – Minimum cross-sectional areas . 18
557.5 Requirements for auxiliary circuits used for measurement. 19
557.6 Functional consideration . 19
557.7 Functional safety . 22
557.8 EMC . 22
559 Luminaires and lighting installations . 22
559.1 Scope . 22
559.2 Terms and definitions . 22
559.3 General requirements for installations . 23
559.4 Protection of the surroundings against thermal effects . 23
559.5 Wiring systems for lighting installations . 24
559.6 Independent lamp controlgear, e.g. ballasts . 25
559.7 Compensation capacitors . 25
559.8 Protection against electric shock for display stands for luminaires . 26
559.9 Stroboscopic effect . 26
559.10 Ground recessed luminaires . 26

Annex A (informative) List of notes concerning certain countries . 27
Annex B (informative) Explanation of symbols used in luminaires, in controlgear
for luminaires and in the installation of the luminaires . 33

60364-5-55 © IEC:2011+A1:2012 – 3 –
Bibliography . 35

Figure 557.1 – Auxiliary circuit supplied directly from the main circuit . 15
Figure 557.2 – Auxiliary circuit supplied via rectifier from the main circuit . 16
Figure 557.3 – Auxiliary circuit supplied from the main circuit via transformer . 16
Figure 557.4 – Configuration of an auxiliary circuit . 21

Table 557.1 – Minimum cross-sectional area of copper conductors in mm . 18

– 4 – 60364-5-55 © IEC:2011+A1:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_______________
ELECTRICAL INSTALLATIONS OF BUILDINGS –

Part 5-55: Selection and erection of electrical equipment –
Other equipment
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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 consolidated version of IEC 60364-5-55 consists of the second edition (2011)
[docu
...

IEC 60364-5-55 ®
Edition 2.2 2016-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical installations of buildings –
Part 5-55: Selection and erection of electrical equipment – Other equipment

Installations électriques des bâtiments –
Partie 5-55: Choix et mise en oeuvre des matériels électriques – Autres 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.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
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
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and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

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A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
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Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 15
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
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IEC 60364-5-55 ®
Edition 2.2 2016-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical installations of buildings –

Part 5-55: Selection and erection of electrical equipment – Other equipment

Installations électriques des bâtiments –

Partie 5-55: Choix et mise en oeuvre des matériels électriques – Autres matériels

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 91.140 ISBN 978-2-8322-3578-2

IEC 60364-5-55 ®
Edition 2.2 2016-07
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Electrical installations of buildings –
Part 5-55: Selection and erection of electrical equipment – Other equipment

Installations électriques des bâtiments –
Partie 5-55: Choix et mise en oeuvre des matériels électriques – Autres matériels

– 2 – IEC 60364-5-55:2011+AMD1:2012
+AMD2:2016 CSV © IEC 2016
CONTENTS
FOREWORD. 4
550 Introduction . 6
550.1 Scope . 6
550.2 Normative references . 6
550.3 Terms and definitions . 8
551 Low-voltage generating sets . 8
551.1 Scope . 8
551.2 General requirements . 9
551.3 Protective measure: extra-low-voltage provided by SELV and PELV . 10
551.4 Fault protection (protection against indirect contact) . 10
551.5 Protection against overcurrent . 11
551.6 Additional requirements for installations where the generating set provides
a supply as a switched alternative to the normal supply to the installation . 12
551.7 Additional requirements for installations where the generating set may .
operate in parallel with other sources including systems for distribution of
electricity to the public . 12
551.8 Requirements for installations incorporating stationary batteries . 14
557 Auxiliary circuits . 14
557.1 Scope . 14
557.2 Terms and definitions . 14
557.3 Requirements for auxiliary circuits . 15
557.4 Characteristics of cables and conductors – Minimum cross-sectional areas . 18
557.5 Requirements for auxiliary circuits used for measurement . 19
557.6 Functional consideration . 20
557.7 Functional safety . 22
557.8 EMC . 22
559 Luminaires and lighting installations . 22
559.1 Scope . 22
559.2 Terms and definitions . 22
559.3 General requirements for installations . 23
559.4 Protection of the surroundings against thermal effects . 23
559.5 Wiring systems for lighting installations . 24
559.6 Independent lamp controlgear, e.g. ballasts . 25
559.7 Compensation capacitors . 26
559.8 Protection against electric shock for display stands for luminaires . 26
559.9 Stroboscopic effect . 26
559.10 Ground recessed luminaires . 26
Annex A (informative) List of notes concerning certain countries . 27
Annex B (informative) Explanation of symbols used in luminaires, in controlgear for
luminaires and in the installation of the luminaires . 33
Bibliography . 35

Figure 557.1 – Auxiliary circuit supplied directly from the main circuit . 15
Figure 557.2 – Auxiliary circuit supplied via rectifier from the main circuit . 16
Figure 557.3 – Auxiliary circuit supplied from the main circuit via transformer . 16
Figure 557.4 – Configuration of an auxiliary circuit . 21

+AMD2:2016 CSV © IEC 2016
Table 557.1 – Minimum cross-sectional area of copper conductors in mm . 19

– 4 – IEC 60364-5-55:2011+AMD1:2012
+AMD2:2016 CSV © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_______________
ELECTRICAL INSTALLATIONS OF BUILDINGS –
Part 5-55: Selection and erection of electrical equipment –
Other equipment
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 p
...