IEC 60364-7-704:2017

Low-voltage electrical installations - Part 7-704: Requirements for special installations or locations - Construction and demolition site installations

IEC 60364-7-7-704:2017 lays down requirements which apply to installations for construction and demolition sites for use during the period of the construction or demolition work which are intended to be taken out of service upon completion of the works. Examples include the following:
- construction work of new buildings;
- repair, alteration, extension or demolition of existing buildings or parts of existing buildings;
- engineering works;
- earthworks;
- work of similar nature. The requirements apply to fixed or moveable installations. This new edition includes the following significant technical changes with respect to the previous edition:
- clarification of the scope;
- clarification of compliance with standards;
- clarification of devices for isolation.

Installations électriques à basse tension - Partie 7-704: Exigences pour les installations ou emplacements spéciaux - Installations de chantiers de construction et de démolition

IEC 60364-7-7-704:2017 s’applique aux installations pour chantiers de construction et de démolition utilisées lors des travaux de construction ou de démolition et destinées à être retirées du service à l’achèvement des travaux. Ces travaux comprennent par exemple:
- les travaux de construction de nouveaux bâtiments;
- les travaux de réparation, de modification, d’extension ou de démolition de bâtiments existants ou de parties de ces bâtiments;
- les travaux publics;
- les travaux de terrassement; et
- les travaux analogues.
Les exigences s’appliquent aux installations fixes ou mobiles.
Les exigences ne sont pas applicables aux installations de locaux administratifs des chantiers (par exemple bureaux, vestiaires, salles de réunion, cantines, restaurants, dortoirs et locaux sanitaires).
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- clarification du domaine d’application;
- clarification de la conformité aux normes;
- clarification des dispositifs de sectionnement.

General Information

• Status: Published
• Publication Date: 27-Mar-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.020 - Electrical engineering in general
• ICS: 29.030 - Magnetic materials
• ICS: 29.100.10 - Magnetic components
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: TC 64 - Electrical installations and protection against electric shock
• Drafting Committee: MT 9 - TC 64/MT 9
• Current Stage: PPUB - Publication issued
• Start Date: 17-Mar-2017
• Completion Date: 28-Mar-2017

Relations

• Revises: IEC 60364-7-704:2005 - Low-voltage electrical installations - Part 7-704: Requirements for special installations or locations - Construction and demolition site installations
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60364-7-704 ®
Edition 3.0 2017-03
INTERNATIONAL
STANDARD
Low voltage electrical installations –
Part 7-704: Requirements for special installations or locations – Construction
and demolition site 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
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.

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
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bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
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documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
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IEC 60364-7-704 ®
Edition 3.0 2017-03
INTERNATIONAL
STANDARD
Low voltage electrical installations –

Part 7-704: Requirements for special installations or locations – Construction

and demolition site installations

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.020; 91.140.50 ISBN 978-2-8322-4020-5

– 2 – IEC 60364-7-704:2017 © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
704 Construction and demolition site installations . 6
704.1 Scope . 6
704.2 Normative references . 6
704.3 Terms and definitions . 7
704.30 Assessment of general characteristics . 7
704.31 Purposes, supplies and structure . 7
704.313 Supplies . 7
704.4 Protection for safety . 7
704.41 Protection against electric shock . 7
704.410 Introduction . 7
704.411 Protective measure: automatic disconnection of supply . 8
704.414 Protective measure: Extra-low voltage provided by SELV and PELV . 8
704.44 Protection against voltage disturbances and electromagnetic
disturbances . 8
704.443 Protection against transient overvoltages of atmospheric origin or due to
switching . 8
704.5 Selection and erection of equipment . 8
704.51 Common rules . 8
704.511 Compliance with standards. 8
704.512 Operational conditions and external influences . 9
704.52 Wiring systems . 9
704.53 Isolation, switching and control . 9
704.536 Isolation and switching . 9
704.56 Safety services . 10
704.6 Verification . 10
Annex A (informative) List of notes concerning certain countries . 11
Bibliography . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW VOLTAGE ELECTRICAL INSTALLATIONS –

Part 7-704: Requirements for special installations or locations –
Construction and demolition site installations

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.
International Standard IEC 60364-7-704 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 2005. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clarification of the Scope;
b) clarification of compliance with standards;
c) clarification of devices for isolation.

– 4 – IEC 60364-7-704:2017 © IEC 2017
The text of this International Standard is based on the following documents:
FDIS Report on voting
64/2155/FDIS 64/2167/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.
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 reader's attention is drawn to the fact that Annex A lists all of the “in-some-countries”
clauses on differing practices of a less permanent nature relating to the subject of this
standard.
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.

INTRODUCTION
For the purpose of this part of IEC 60364 (IEC 60364-7-704) the requirements of the general
parts 1 to 6 of IEC 60364 apply.
The IEC 60364-7-7XX parts of IEC 60364 contain particular requirements for special
installations or locations which are based on the requirements of the general parts of
IEC 60364 (IEC 60364-1 to IEC 60364-6). These IEC 60364-7-7XX parts are considered in
conjunction with the requirements of the general parts.
The particular requirements of this part of IEC 60364 supplement, modify or replace certain of
the requirements of the general parts of IEC 60364 being valid at the time of publication of
this part. The absence of reference to the exclusion of a part or a clause of a general part
means that the corresponding clauses of the general part are applicable (undated reference).
Requirements of other 7XX parts being relevant for installations covered by this part also
apply. This part may therefore also supplement, modify or replace certain of these
requirements valid at the time of publication of this part.
The clause numbering of this part follows the pattern and corresponding references of
IEC 60364. The numbers following the particular number of this part are those of the
corresponding parts, or clauses of the other parts of the IEC 60364 series, valid at the time of
publication of this part, as indicated in the normative references of this document (dated
reference).
If requirements or explanations additional to those of the other parts of the IEC 60364 series
are needed, the numbering of such items appears as 704.101, 704.102, 704.103 etc.
In the case where new or amended general parts with modified numbering were published
after this part was issued, the clause numbers referring to a general part in this 704 part may
no longer align with the latest edition of the general part. Dated references should be
observed.
– 6 – IEC 60364-7-704:2017 © IEC 2017
LOW VOLTAGE ELECTRICAL INSTALLATIONS –

Part 7-704: Requirements for special installations or locations –
Construction and demolition site installations

704 Construction and demolition site installations
704.1 Scope
The requirements of this part of IEC 60364 apply to installations for construction and
demolition sites for use during the period of the construction or demolition work which are
intended to be taken out of service upon completi
...

IEC 60364-7-704 ®
Edition 3.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low voltage electrical installations –
Part 7-704: Requirements for special installations or locations – Construction
and demolition site installations

Installations électriques à basse tension –
Partie 7-704: Exigences pour les installations ou emplacements spéciaux –
Installations de chantiers de construction et de démolition

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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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 [e-mail]
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 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 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 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

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IEC 60364-7-704 ®
Edition 3.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low voltage electrical installations –

Part 7-704: Requirements for special installations or locations – Construction

and demolition site installations

Installations électriques à basse tension –

Partie 7-704: Exigences pour les installations ou emplacements spéciaux –

Installations de chantiers de construction et de démolition

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.020; 91.140.50 ISBN 978-2-8322-6107-1

– 2 – IEC 60364-7-704:2017 © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
704 Construction and demolition site installations . 6
704.1 Scope . 6
704.2 Normative references . 6
704.3 Terms and definitions . 7
704.30 Assessment of general characteristics . 7
704.31 Purposes, supplies and structure . 7
704.313 Supplies . 7
704.4 Protection for safety . 7
704.41 Protection against electric shock . 7
704.410 Introduction . 7
704.411 Protective measure: automatic disconnection of supply . 8
704.414 Protective measure: Extra-low voltage provided by SELV and PELV . 8
704.44 Protection against voltage disturbances and electromagnetic
disturbances . 8
704.443 Protection against transient overvoltages of atmospheric origin or due to
switching . 8
704.5 Selection and erection of equipment . 8
704.51 Common rules . 8
704.511 Compliance with standards. 8
704.512 Operational conditions and external influences . 9
704.52 Wiring systems . 9
704.53 Isolation, switching and control . 9
704.536 Isolation and switching . 9
704.56 Safety services . 10
704.6 Verification . 10
Annex A (informative) List of notes concerning certain countries . 11
Bibliography . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW VOLTAGE ELECTRICAL INSTALLATIONS –

Part 7-704: Requirements for special installations or locations –
Construction and demolition site installations

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.
International Standard IEC 60364-7-704 has been prepared by IEC technical committee 64:
Electrical installations and protection against electric shock.
This bilingual version (2018-10) corresponds to the monolingual English version, published in
2017-03.
This third edition cancels and replaces the second edition published in 2005. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clarification of the Scope;
b) clarification of compliance with standards;
c) clarification of devices for isolation.

– 4 – IEC 60364-7-704:2017 © IEC 2017
The text of this International Standard is based on the following documents:
FDIS Report on voting
64/2155/FDIS 64/2167/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.
The French version of this
...