IEC 60364-7-717:2009

IEC 60364-7-717 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage electrical installations –
Part 7-717: Requirements for special installations or locations – Mobile or
transportable units
Installations électriques à basse tension –
Partie 7-717: Règles pour les installations ou emplacements spéciaux – Unités
mobiles ou transportables
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IEC 60364-7-717 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage electrical installations –
Part 7-717: Requirements for special installations or locations – Mobile or
transportable units
Installations électriques à basse tension –
Partie 7-717: Règles pour les installations ou emplacements spéciaux – Unités
mobiles ou transportables
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
S
CODE PRIX
ICS 29.020; 91.140.50 ISBN 978-2-88910-178-8
– 2 – 60364-7-717 © IEC:2009
CONTENTS
FOREWORD.3
INTRODUCTION.5
717 Mobile or transportable units.6
717.1 Scope.6
717.2 Normative references .6
717.30 Assessment of general characteristics.7
717.31 Purposes, supplies and structure.7
717.312 Conductor arrangement and system earthing.7
717.313 Supplies .7
717.4 Protection for safety .8
717.41 Protection against electric shock .8
717.413 Protective measure: electrical separation .9
717.415 Additional protection.9
717.43 Protection against overcurrent .10
717.431 Requirements according to the nature of the circuits .10
717.5 Selection and erection of electrical equipment .10
717.51 Common rules.10
717.514 Identification.10
717.52 Wiring systems.10
717.55 Other equipment.11
Annex A (informative) List of notes concerning certain countries.20
Bibliography.21

Figure 717.1 – Example of connection to a Class I or Class II low voltage generating
set located inside the unit with or without an earth electrode.12
Figure 717.2 – Example of connection to a Class II low voltage generating set located
outside the unit .13
Figure 717.3 – Example of connection to any type of earthing system of a fixed
installation with automatic disconnection of supply by residual current device (RCD),
with or without an earth electrode .14
Figure 717.4 – Example of connection to a fixed electrical installation with any type of
earthing system using a simple separation transformer and an IT system with an earth
electrode .15
Figure 717.5 – Example of connection with simple separation and an IT system with an
insulation monitoring device and disconnection of supply after a first fault .
Figure 717.6 – Example of connection with simple separation and a TN system with or
without an earth electrode.16
Figure 717.7 – Example of connection to a fixed electrical installation with any type of
earthing system by using an IT system without automatic disconnection in the event of
first fault .17
Figure 717.8 – Example of connection to a fixed electrical installation with any type of
earthing system using electrical separation provided by an isolating transformer .18

60364-7-717 © IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE ELECTRICAL INSTALLATIONS –

Part 7-717: Requirements for special installations or locations –
Mobile or transportable units
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
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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 60364-7-717 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 and constitutes a
technical revision.
The main changes with respect to the previous edition are as follows:
– The scope has been improved, providing more detail;
– The content of Clause 717.41 has been updated following the new edition of
IEC 60364-4-41;
– Clauses concerning protection by automatic disconnection of the supply and additional
protection have been introduced;
– All figures have been updated.

– 4 – 60364-7-717 © IEC:2009
The text of this standard is based on the following documents:
FDIS Report on voting
64/1675/FDIS 64/1684/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.
The reader’s attention is drawn to the fact that Annex A lists all of the “in-some-country”
clauses on differing practices of a less permanent nature relating to the subject of this
standard.
IEC 60364 consists of the following parts, under the general title: Low-voltage electrical
instal
...