IEC 60364-7-717:2009
(Main)Low-voltage electrical installations - Part 7-717: Requirements for special installations or locations - Mobile or transportable units
Low-voltage electrical installations - Part 7-717: Requirements for special installations or locations - Mobile or transportable units
IEC 60364-7-717:2009 is applicable to mobile or transportable units. For the purposes of this standard, the term "unit" refers to a vehicle and/or mobile or transportable structure in which all or part of an electrical installation is contained. Units are either of the mobile type or of the transportable type. Examples are units for television and broadcasting, medical services, advertising, fire fighting, using special information technology, units for disaster relief, catering units and the like. The requirements of this standard also apply where two or more units are connected together to form a single electrical installation. 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.
Installations électriques à basse tension - Partie 7-717: Règles pour les installations ou emplacements spéciaux - Unités mobiles ou transportables
La CEI 60364-7-717:2009 est applicable aux unités mobiles ou transportables. Dans le cadre de cette norme, le terme "unité" s'applique à un véhicule et/ou à une structure mobile ou transportable dans lesquels une installation électrique ou une partie de celle-ci est incorporée. Les unités sont soit du type mobile ou du type transportable. Des exemples sont des unités pour la télévision ou la radiodiffusion, les services médicaux, la publicité, la lutte contre l'incendie, utilisant des technologies particulières de traitement de l'information, des unités de secours en cas de désastre, des unités de ravitaillement et similaires. Les spécifications de cette norme s'appliquent également lorsque deux ou plusieurs unités sont interconnectées pour former une seule installation électrique. Cette deuxième édition annule et remplace la première édition publiée en 2001 et constitue une révision technique. Les principales modifications par rapport à l'édition précédente sont les suivantes:
- Le domaine d'application a été amélioré et élaboré;
- Le contenu de l'Article 717.41 a été mis à jour, suite à la nouvelle édition de la CEI 60364-4-41;
- Les articles concernant la protection par coupure automatique de l'alimentation et la protection supplémentaire ont été ajoutées;
- Toutes les figures ont été mises à jour.
General Information
Standards Content (Sample)
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
IEC 60364-7-717:2009
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---------------------- Page: 2 ----------------------
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
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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– 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
16
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
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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
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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.
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– 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
installations:
Part 1: Fundamental principles, assessment of general characteristics, definitions
Part 4: Protection for safety
Part 5: Selection and erection of electrical equipment
Part 6: Verification
Part 7: Requirements for special installations or locations
A list of all the parts in the IEC 60364 series can be found on the IEC website.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site 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.
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60364-7-717 © IEC:2009 – 5 –
INTRODUCTION
The requirements of this part of IEC 60364 supplement, modify or replace certain of the
general requirements contained in Parts 1 to 6 of IEC 60364.
The clause numbering appearing after 717 refers to the corresponding parts or clauses of
IEC 60364, Parts 1 to 6. Numbering of clauses does not, therefore, necessarily follow
sequentially. Numbering of figures and tables takes the number of this part followed by a
sequential number.
The absence of reference to a part or clause means that the general requirements contained
in Parts 1 to 6 of IEC 60364 are applicable.
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– 6 – 60364-7-717 © IEC:2009
LOW-VOLTAGE ELECTRICAL INSTALLATIONS –
Part 7-717: Requirements for special installations or locations –
Mobile or transportable units
717 Mobile or transportable units
717.1 Scope
The particular requirements as specified in this part of IEC 60364 are applicable to mobile or
transportable units.
" "
For the purposes of this part, the term unit refers to a vehicle and/or mobile or transportable
structure in which all or part of an electrical installation is contained.
Units are either of the mobile type or of the transportable type.
Examples are units for television and broadcasting, medical services, advertising, fire fighting,
using special information technology, units for disaster relief, catering units and the like.
The requirements of this part also apply where two or more units are connected together to
form a single electrical installation (see 717.551.6 and 717.551.7).
The requirements are not applicable to
− electrical circuits and equipment for automotive purposes,
− generating sets,
− units covered by other parts of Part 7 (e.g. caravan and motor-caravan),
− pleasure craft (see IEC 60092-507),
− mobile machinery in accordance with IEC 60204-1,
− traction equipment of electric vehicles,
− mobile or transportable homes, offices and the like for extended use at the same location
(see general rules of IEC 60364).
Where applicable, additional requirements as laid down in other clauses of Part 7 are to be
taken into consideration, e.g. for showers, medical locations, etc.
717.2 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 edition
of the referenced document (including any amendments) applies.
IEC 60227-3:1993, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 3: Non-sheathed cables for fixed wiring
IEC 60245-4, Rubber insulated cables – Rated voltages up to and including 450/750 V – Part 4:
Cords and flexible cables
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60364-7-717 © IEC:2009 – 7 –
IEC 60309-1, Plugs, socket-outlets and couplers for industrial purposes – Part 1: General
requirements
IEC 60309-2, Plugs, socket-outlets and couplers for industrial purposes – Part 2: Dimensional
interchangeability requirements for pin and contact-tube accessories
IEC 60364-4-41:2005, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
IEC 60364-5-55, Electrical installations of buildings – Part 5-55: Selection and erection of
electrical equipment – Other
IEC 60364-7 (all parts) Low-voltage electrical installations – Part 7: Requirements for special
installations or locations
IEC 60884-1, Plugs and socket-outlets for household and similar purposes – Part 1: General
IEC 61084 (all parts), Cable trunking and ducting systems for electrical installations
IEC 61140, Protection against electric shock – Common aspects for installation and
equipment
IEC 61386-21: Conduit systems for cable management – Part 21: Particular requirements –
Rigid conduit systems
IEC 61386-22: Conduit systems for cable management – Part 22: Particular requirements –
Pliable conduit systems
IEC 61386-23: Conduit systems for cable management – Part 23: Particular requirements –
Flexible conduit systems
717.30 Assessment of general characteristics
717.31 Purposes, supplies and structure
717.312 Conductor arrangement and system earthing
717.312.2 Types of system earthing
Add the following:
NOTE Where the designation TN or TT or IT is used in this Part 7-717, it means only that the protective principles
of these systems apply. If a connection to the earth electrode is not provided, a connection to the conductive
enclosure or to the protective bonding of the unit may be sufficient.
717.312.2.1 TN Systems
Add the following:
The use of the TN-C system is not permitted inside any unit.
717.313 Supplies
Add the following:
One or more of the following methods shall be used to supply a unit:
a) connection to a low-voltage generating set in accordance with IEC 60364-5-55 (see
Figures 717.1 and 717.2);
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– 8 – 60364-7-717 © IEC:2009
b) connection to a fixed electrical installation in which the protective measures are effective
(see Figure 717.3);
c) connection through means providing simple separation, in accordance with IEC 61140,
from a fixed electrical installation (see Figures 717.4, 717.5, 717.6 and 717.7);
d) connection through means providing electrical separation from a fixed electrical
installation (see example in Figure 717.8).
NOTE 1 In cases a), b) and c), an earth electrode may be provided.
NOTE 2 In the case of Figure 717.4, an earth electrode may be necessary for protective purposes (see
717.411.6.2b, second dash).
NOTE 3 Simple separation or electrical separation is appropriate, for example, where information technology
equipment is used in the unit or where a reduction of electromagnetic influences is necessary, or if high leakage
currents are to be expected (use of frequency converters), and/or if the supply of the unit comes from alternative
supply systems (as is the case in disaster management).
The sources, means of connection or separation may be within the unit.
NOTE 4 Where there is a potential hazard due to moving the unit while connected to an external installation, it is
recommended to equip the unit with an electric interlock, warning, alarm or other appropriate means to reduce the
risk.
NOTE 5 For the purpose of this Part 7-717, power inverters or frequency converters that are supplied by the low-
voltage vehicle electrical system or auxiliary drive systems of the combustion engine are also considered as low-
voltage generating sets.
Power inverters or frequency converters shall include at least simple separation where both a
d.c. system and a.c. system are earthed.
717.4 Protection for safety
717.41 Protection against electric shock
717.411 Protective measure: automatic disconnection of supply
Add the following:
a) For a supply in accordance with 717.313 a), only TN and IT systems are permitted.
Protection shall be provided by automatic disconnection of supply, and
– in a TN system, 717.411.4.1 applies;
– in an IT system, 717.411.6.2 applies.
b) For a supply in accordance with 717.313 b), automatic disconnection of the supply shall
be provided by a residual current protective device, with a rated residual operating current
not exceeding 30 mA.
c) In all cases a) to d) of 717.313, any equipment installed between the source of supply and
the protective devices providing automatic disconnection of the supply within the unit,
including these protective devices themselves, shall be protected by use of class II
equipment or by equivalent insulation.
717.411.3 Requirements for fault protection
717.411.3.1 Protective earthing and protective equipotential bonding
717.411.3.1.2 Protective equipotential bonding
Add the following:
Accessible conductive parts of the unit, such as the chassis, shall be connected through the
protective bonding conductors to the main earthing terminal within the unit.
The protective bonding conductors shall be finely stranded.
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60364-7-717 © IEC:2009 – 9 –
NOTE Type 227 IEC 02 in accordance with IEC 60227-3 is appropriate.
717.411.4 TN system
717.411.4.1
Add the following:
Where a TN system is used within a unit with a conductive enclosure and supplied according
to 717.313 a) or c), this enclosure shall be connected to the neutral point or, if not available, a
line conductor (see Figures 717.1, 717.2 and 717.6).
For a unit without a conductive enclosure, the exposed-conductive-parts of the equipment
inside the unit shall be connected by means of a protective conductor to the neutral point or, if
not available, to a line conductor.
717.411.6 IT system
717.411.6.2
Add the following:
Where an IT system is used within a unit with a conductive enclosure, connection of the
exposed-conductive-parts of the equipment to the conductive enclosure is necessary.
For a unit without a conductive enclosure, the exposed-conductive-parts inside shall be
connected to one another and to a protective conductor.
An IT system can be provided by
a) an isolating transformer or a low-voltage generating set, with an insulation monitoring
device or an insulation fault location system, both without automatic disconnection of
supply in the case of a first fault and without need for a connection to an earthing installation
(see Figure 717.7); the second fault shall be automatically disconnected by an overcurrent
protective device according to 411.6.4,
b) an isolating transformer providing electrical separation, e.g. in accordance with
IEC 60364-4-41, only
– where an insulation monitoring device is installed providing automatic disconnection of
the supply in case of a first fault between live parts and the frame of the unit (see
Figure 717.5), or
– where a residual current protective device and an earth electrode are installed to
provide automatic disconnection in the case of failure in the transformer providing
simple separation (see Figure 717.4). Each equipment used outside the unit shall be
protected by a separate residual current protective device with a rated residual
operating current not exceeding 30 mA.
717.413 Protective measure: electrical separation
Add the following:
(For example see Figure 717.8).
717.415 Additional protection
717.415.1 Additional protection: residual current protective devices (RCDs)
Add the following:
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Additional protection by residual current protective devices with a rated residual operating
current not exceeding 30 mA is necessary for all socket-outlets intended to supply current-
using equipment outside the unit, with the exception of socket-outlets which are supplied from
circuits with protection by
– SELV, or
– PELV, or
– electrical separation.
717.43 Protection against overcurrent
717.431 Requirements according to the nature of the circuits
717.431.1 Protection of line conductors
Add the following:
Where the supply is in accordance with 717.313 a) or c), and where a line conductor is
connected to the conductive enclosure of the unit, no overcurrent protective device is required
in this line conductor.
717.5 Selection and erection of electrical equipment
717.51 Common rules
717.514 Identification
Add the following:
A permanent notice of durable material shall be fixed to the unit in a prominent position,
preferably adjacent to the supply inlet connector. The notice should state in clear and
unambiguous terms the following:
– the type of supply which may be connected to the unit;
– the voltage rating of the unit;
– the number of phases and their configuration;
– the on-board earthing arrangement;
– the maximum power requirement of the unit.
For socket-outlets individually protected by the protective measure electrical separation (see
413.1.2), a durable indication shall be located adjacent to these socket-outlets stating that
only one item of current-using electrical equipment shall be connected to each socket-outlet.
717.52 Wiring systems
Add the following:
717.52.1 Cables of type 245 according to IEC 60245-4 or cables of equivalent design having
2
a minimum cross-sectional area of 2,5 mm Cu shall be used for connecting the unit to the
supply. The flexible cable shall enter the unit by an insulating inlet in such a way as to
minimize the possibility of any insulation damage or fault which might energize the exposed-
conductive-parts of the unit. The cable sheath shall be firmly gripped by the cable gland of the
connector or anchored to the unit during operation to prevent stress on the termination.
717.52.2 The wiring systems shall be installed using one or more of the following:
a) insulated single-core cables, with flexible conductors or with stranded conductors
(minimum of 7 strands), in
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60364-7-717 © IEC:2009 – 11 –
• non-metallic conduits, or
• non-metallic cable trunking systems, or
• non-metallic cable ducting systems;
b) sheathed flexible cables.
All cables shall, as a minimum, meet the requirements of IEC 60227-3 and IEC 60332-1-2.
Conduits shall comply with IEC 61386-21, IEC 61386-22 or IEC 61386-23.
Trunking and ducting systems in accordance with IEC 61084 may be used.
717.55 Other equipment
717.551.6 Additional requirements for installations where the generating set
provides a supply as a switched alternative to the normal supply to the
installation
Add the following:
Units with different power supply systems and different earthing systems shall not be
interconnected.
717.551.7 Additional requirements for installations where the generating set may
operate in parallel with other sources including systems for distribution of
electricity to the public
Add the following:
Units with different power supply systems and different earthing systems shall not be
interc
...
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