HD 60364-7-717:2010

SLOVENSKI STANDARD
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Low-voltage electrical installations - Part 7-717: Requirements for special installations or
locations - Mobile or transportable units
Errichten von Niederspannungsanlagen - Errichten von Niederspannungsanlagen - Teil 7
-717: Anforderungen für Betriebsstätten, Räume und Anlagen besonderer Art -
Ortsveränderliche oder transportable Baueinheiten
Installations électriques à basse tension - Partie 7-717: Règles pour les installations ou
emplacements spéciaux - Unités mobiles ou transportables
Ta slovenski standard je istoveten z: HD 60364-7-717:2010
ICS:
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONIZATION DOCUMENT
HD 60364-7-717
DOCUMENT D'HARMONISATION
March 2010
HARMONISIERUNGSDOKUMENT
ICS 29.020; 91.140.50 Supersedes HD 60364-7-717:2004

English version
Low-voltage electrical installations -
Part 7-717: Requirements for special installations or locations -
Mobile or transportable units
(IEC 60364-7-717:2009, modified)

Installations électriques à basse tension - Errichten von Niederspannungsanlagen -
Partie 7-717: Règles pour les installations Teil 7-717: Anforderungen
ou emplacements spéciaux - für Betriebsstätten, Räume und Anlagen
Unités mobiles ou transportables besonderer Art -
(CEI 60364-7-717:2009, modifiée) Ortsveränderliche oder transportable
Baueinheiten
(IEC 60364-7-717:2009, modifiziert)

This Harmonization Document was approved by CENELEC on 2009-10-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this
Harmonization Document at national level.

Up-to-date lists and bibliographical references concerning such national implementations may be obtained on
application to the Central Secretariat or to any CENELEC member.

This Harmonization Document exists in three official versions (English, French, German).

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 60364-7-717:2010 E

Foreword
The text of document 64/1675/FDIS, future edition 2 of IEC 60364-7-717, prepared by IEC TC 64, Electrical
installations and protection against electric shock, was submitted to the IEC-CENELEC parallel vote.
A draft amendment, prepared by the Technical Committee CENELEC TC 64, Electrical installations and
protection against electric shock, was submitted to the formal vote.
The combined texts were approved by CENELEC as HD 60364-7-717 on 2009-10-01.
This Harmonization Document supersedes HD 60364-7-717:2004.
The main changes with respect to HD 60364-7-717:2004 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 HD 60364-4-41;
– clauses concerning protection by automatic disconnection of the supply and additional protection have
been introduced;
– all figures have been updated.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.
The following dates were fixed:
- latest date by which the HD has to be implemented (dop) 2010-10-01
at national level by publication of a harmonized
national standard or by endorsement
- latest date by which the national standards conflicting (dow) 2012-10-01
with the HD have to be withdrawn
In this document, the common modifications to the International Standard are indicated by a vertical line in
the left margin of the text.
For this Harmonization Document, the informative Annex A of IEC 60364-7-717:2009 shall be disregarded
and has been replaced by the normative Annex ZA, Special national conditions.
Annex ZA has been added by CENELEC.

– 3 – HD 60364-7-717:2010
717 Mobile or transportable units
717.1 Scope
The particular requirements as specified in this part of HD 60364 are applicable to a.c. and d.c. installations
for 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 (using wheels), for example self-propelled or towed, or of the
transportable type, for example container or cabin placed on base frame.
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 EN 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 HD 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.
HD 21.3 S3:1995, Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V –
Part 3: Non-sheathed cables for fixed wiring (IEC 60227-3:1993, mod.)
HD 22.4, Cables of rated voltages up to and including 450/750 V and having cross-linked insulation -- Part 4:
Cords and flexible cables
EN 60309-1, Plugs, socket-outlets and couplers for industrial purposes – Part 1: General requirements
(IEC 60309-1, mod.)
EN 60309-2, Plugs, socket-outlets and couplers for industrial purposes – Part 2: Dimensional
interchangeability requirements for pin and contact-tube accessories (IEC 60309-2, mod.)
EN 60332-1-2, Tests on electric and optical fibre cables under fire conditions - Part 1-2: Test for vertical
flame propagation for a single insulated wire or cable - Procedure for 1 kW pre-mixed flame (IEC 60332-1-2)
HD 60364-4-41:2007, Low-voltage electrical installations – Part 4-41: Protection for safety – Protection
against electric shock (IEC 60364-4-41:2005, mod.)
HD 60364-5-551, Low-voltage electrical installations -- Part 5-55: Selection and erection of electrical
equipment - Other equipment -- Clause 551: Low-voltage generating sets (IEC 60364-5-55/A2 (Clause 551))

HD 60364-7 (all parts), Low-voltage electrical installations – Part 7: Requirements for special installations or
locations (IEC 60364, all parts)
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
EN 61140, Protection against electric shock – Common aspects for installation and equipment (IEC 61140)
EN 61386-21, Conduit systems for cable management – Part 21: Particular requirements – Rigid conduit
systems (IEC 61386-21)
EN 61386-22, Conduit systems for cable management – Part 22: Particular requirements – Pliable conduit
systems (IEC 61386-22)
EN 61386-23, Conduit systems for cable management – Part 23: Particular requirements – Flexible conduit
systems (IEC 61386-23)
EN 61557-8, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices
for IT systems (IEC 61557-8)
EN 61557-9, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or monitoring of protective measures – Part 9: Equipment for insulation
fault location in IT systems (IEC 61557-9)
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 HD 60364-5-551 (see Figures 717.1 and
717.2);
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 EN 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.

– 5 – HD 60364-7-717:2010
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.
Power inverters or frequency converters shall include galvanic separation in cases where both DC polarity
and AC neutral point are connected to the earth.
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.
NOTE Type H07V-K in accordance with HD 21.3 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 shall be provided by an isolating transformer or a low voltage generating set, with an insulation
monitoring device accordi
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