IEC 60364-5-56:2018

IEC 60364-5-56 ®
Edition 3.0 2018-11
INTERNATIONAL
STANDARD
Low-voltage electrical installations –
Part 5-56: Selection and erection of electrical equipment – Safety services

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IEC 60364-5-56 ®
Edition 3.0 2018-11
INTERNATIONAL
STANDARD
Low-voltage electrical installations –

Part 5-56: Selection and erection of electrical equipment – Safety services

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 91.140.50 ISBN 978-2-8322-6180-4

– 2 – IEC 60364-5-56:2018 © IEC 2018
CONTENTS
FOREWORD . 3
560.1 Scope . 5
560.2 Normative references . 5
560.3 Terms and definitions . 6
560.4 Classification . 8
560.5 General . 8
560.6 Electrical sources for safety services . 9
560.7 Electrical circuits of safety services. 10
560.8 Wiring systems . 11
560.9 Emergency lighting applications . 12
560.10 Fire protection applications/equipment . 14
Annex A (informative) Guidance for emergency lighting . 15
Annex B (informative) Guidance for fire protection equipment . 16
Annex C (informative) List of notes concerning certain countries . 17
Annex D (informative) Fire switch . 21
Annex E (informative) Example of installation methods of safety services with cable
management system . 22
Annex F (informative) Wiring systems . 23
F.1 Ambient test temperature rise . 23
F.2 Duration of the safety service. 23
F.3 Expected resistance of feeder conductors . 23
F.4 Protection against electric shock in the event of a failure by means of the
touch voltage reduction . 24
F.5 Conductor resistance in case of fire . 24
F.6 High temperature effects . 25
F.7 Feeder circuits . 25
Annex G (informative) Guidance on suitable locations for electrical sources for safety
services . 26
G.1 Recommendations for a suitable location for an electrical source for safety
services . 26
G.2 Conditions of fire protection . 26
Bibliography . 27

Figure D.1 – Fire switch installation . 21
Figure E.1 – Example of cable installation for safety services . 22

Table A.1 – Guidance for emergency lighting . 15
Table B.1 – Guidance for safety equipment . 16

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE ELECTRICAL INSTALLATIONS –

Part 5-56: Selection and erection of electrical equipment –
Safety services
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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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 60364-5-56 has been prepared by IEC technical committee 64:
Electrical installations and protection against electric shock.
This third edition cancels and replaces the second edition published in 2009. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
1) Modifications to normative references and terms and definitions.
2) Under electrical circuits for safety services, addition of requirements concerning circuit
and overcurrent protection in order to maintain reliability of safety service power supplies
under fire conditions.
3) Under electrical circuits for safety services, addition of requirements stating that circuits
for safety services are not to be protected by RCDs or AFDDs.

– 4 – IEC 60364-5-56:2018 © IEC 2018
4) Under emergency lighting applications, addition of requirements to prevent emergency
lighting systems being adversely affected by any control system.
5) Addition of requirements for all emergency luminaires in the area to provide full design
light output in the event of any final circuit failure.
6) Addition of a new Annex D (informative): Fire switch.
7) Addition of a new Annex E (informative): Example of installation methods of safety
services with cable management system.
8) Addition of a new Annex F (informative): Wiring systems.
9) Addition of a new Annex G (informative): Guidance on suitable locations for electrical
sources for safety services.
The text of this International Standard is based on the following documents:
FDIS Report on voting
64/2316/FDIS 64/2341/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The reader’s attention is drawn to the fact that Annex C lists all of the “in-some-country”
clauses on differing practices of a less permanent nature relating to the subject of this
standard.
A list of all parts in the IEC 60364 series, published under the general title Low-voltage
electrical installations, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

LOW-VOLTAGE ELECTRICAL INSTALLATIONS –

Part 5-56: Selection and erection of electrical equipment –
Safety services
560.1 Scope
This part of IEC 60364 covers general requirements for safety services, selection and erection
of electrical supply systems for safety services and the electrical source for safety services.
Standby electrical supply systems are outside the scope of this document. This document
does not apply to installations in hazardous areas (BE3), for which requirements are given in
IEC 60079-14.
560.2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requiremen
...