64/2649/CD
COMMITTEE DRAFT (CD)
P ROJECT NUMBER :
IEC 60364-7-717 ED3
D ATE OF CIRCULATION :
C LOSING DATE FOR COMMENTS :
2023-11-17
2024-03-08
S UPERSEDES DOCUMENTS :
64/2568/CD, 64/2644/CC
IEC TC 64 : E LECTRICAL INSTALLATIONS AND PROTECTION AGAINST ELECTRIC SHOCK
S ECRETARIAT :
S ECRETARY :
Germany
Mr Wolfgang Niedenzu
O F INTEREST TO THE FOLLOWING COMMITTEES :
P ROPOSED HORIZONTAL STANDARD :
TC 20,TC 23,SC 23B,SC 23E,SC 23H,SC 37A,TC
69,TC 82,SC 121A,SC 121B,PC 128
Other TC/SCs are requested to indicate their interest, if
any, in this CD to the secretary.
F UNCTIONS CONCERNED :
EMC
E NVIRONMENT
Q UALITY ASSURANCE
S AFETY
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any local regulations or
technical reasons that may exist and should be considered should this proposal proceed, recognizing that failure
to address such requirements could result in the need for new or existing “In Some Countries” clauses. (SEE
AC/22/2007 OR NEW GUIDANCE DOC).
T ITLE :
Low-voltage electrical installations - Part 7-717: Requirements for special installations or
locations - Mobile or transportable units
N OTE FROM TC/SC OFFICERS :
Internal
Copyright © 2023 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
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CONTENTS
2
3
FOREWORD ........................................................................................................................... 4
4
INTRODUCTION ..................................................................................................................... 6
5
717 Mobile or transportable units ........................................................................................... 7
6
45
717.1 Scope ..................................................................................................................... 7
717.2 Normative references .............................................................................................. 7
717.3 Terms and definitions.............................................................................................. 8
717.31 Purposes, supplies and structure ............................................................................ 8
717.312
Conductor arrangement and system earthing ................................................... 8
717.312.2 Types of system earthing ................................................................................. 8
717.313
Supplies .......................................................................................................... 9
717.4 Protection for safety ................................................................................................ 9
717.41 Protection against electric shock ............................................................................. 9
717.410
Introduction ..................................................................................................... 9
717.410.3 General requirements ...................................................................................... 9
717.411
Protective measure: automatic disconnection of supply ................................. 10
717.411.3 Requirements for fault protection ................................................................... 10
717.412
Protective measure: double or reinforced insulation ....................................... 10
717.412.2 Requirements for basic protection and fault protection ................................... 10
717.44 Protection against voltage disturbances and electromagnetic disturbances ........... 10
717.443
Protection against transient overvoltages of atmospheric origin or due
to switching ........................................................................................................... 10
717.443.3 Overvoltage control ....................................................................................... 10
717.5 Selection and erection of electrical equipment ...................................................... 10
717.51 Common rules ...................................................................................................... 10
717.514
Identification .................................................................................................. 10
717.52 Wiring systems ..................................................................................................... 11
717.521
Types of wiring systems ................................................................................ 11
717.521.101 .................................................................................................................. 11
717.521.102 .................................................................................................................. 11
717.522
Devices for protection for safety, isolation, switching, control and
monitoring ............................................................................................................. 11
717.531
Equipment for protection against electric shock ............................................. 11
717.531.2 Devices for automatic disconnection of supply ............................................... 11
717.534
Devices for protection against transient overvoltages .................................... 12
717.534.4 Selection and erection of SPDs ..................................................................... 12
717.54 Earthing arrangements and protective conductors ................................................. 12
717.544
Protective bonding conductors ....................................................................... 12
717.544.101 .................................................................................................................. 12
717.55 Other equipment ................................................................................................... 12
717.55.101 12
717.55.102 12
717.55.103 12
Annex A (informative) List of notes concerning certain countries .......................................... 13
46
47
UK has specific provisions for the use of certain supplies according to the Electricity
Safety, Quality and Continuity Regulations 2002 ................................................... 13
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Bibliography .......................................................................................................................... 14
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Figure 1 – Example of an earth connection to the chassis ....................................................... 9
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
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LOW-VOLTAGE ELECTRICAL INSTALLATIONS -
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Part 7-717: Requirements for special installations or locations –
Mobile or transportable units
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FOREWORD
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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.
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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.
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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.
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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.
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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.
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6) All users should ensure that they have the latest edition of this publication.
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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.
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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.
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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.
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IEC 60364-7-717 has been prepared by IEC technical committee 64: Electrical installations and
protection against electric shock. It is an International Standard .
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101
This 3 rd edition cancels and replaces the 2nd edition published in 2009. This edition constitutes
a technical revision.
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This edition includes the following significant technical changes with respect to the previous
edition:
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a) The scope has been improved, providing more detail;
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b) The content of Clause 717.41 has been updated following the new edition of IEC 60364-441;
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c) Clauses concerning protection by automatic disconnection of the supply and additional
protection have been introduced;
109
d) All figures have been updated.
110
The text of this International Standard is based on the following documents:
Draft
Report on voting
XX/XX/FDIS
XX/XX/RVD
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Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
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The language used for the development of this International Standard is English.
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This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
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The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
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reconfirmed,
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withdrawn,
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replaced by a revised edition, or
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•
amended.
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INTRODUCTION
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129
For the purpose of this part of IEC 60364 (IEC 60364-7-717) the requirements of the general
Parts 1 to 6 and Part 8 of IEC 60364 apply.
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132
133
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 and IEC 60364-8). These IEC 60364-7-7XX parts are considered
in conjunction with the requirements of the general parts.
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137
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).
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140
Requirements of other 7XX parts being relevant for installations covered by this part also apply.
This part can therefore also supplement, modify or replace certain of these requirements valid
at the time of publication of this part.
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144
145
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).
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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 717.101, 717.102, 717.103, etc.
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149
150
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 Part 717 can no
longer align with the latest edition of the general part. Dated references should be observed.
151
The particular requirements of this document apply to mobile or transportable units.
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153
154
The clause numbering following 717 are those of the corresponding parts or clauses of
IEC 60364. The absence of reference to a part or a clause means that all parts of IEC 60364
are applicable.
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158
The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed
that compliance with this document may involve the use of a patent. IEC takes no position
concerning the evidence, validity, and scope of this patent right.
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The holder of this patent right has assured IEC that s/he is willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world.
In this respect, the statement of the holder of this patent right is registered with IEC. Information
may be obtained from the patent database available at patents.iec.ch/.
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Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights other than those in the patent database. IEC shall not be held
responsible for identifying any or all such patent rights.
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Part 7-717: Requirements for special installations or locations –
Mobile or transportable units
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717 Mobile or transportable units
176
717.1 Scope
177
178
The particular requirements as specified in this part of IEC 60364 applies to mobile units or
transportable units, hereby referred to as units, containing an electrical installation .
179
The requirements of this part are not applicable to:
180
–
generating sets,
181
–
pleasure crafts;
182
–
caravans and motor caravans;
183
–
electrical circuits and equipment for automotive purposes;
184
–
units intended to be permanently connected to an electrical installation.
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186
717.2 Normative references
187
188
189
190
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
191
192
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
193
194
IEC 60245-4, Rubber insulated cables – Rated voltages up to and including 450/750 V – Part
4: Cords and flexible cables
195
196
IEC 60309-1, Plugs, socket-outlets and couplers for industrial purposes – Part 1: General
requirements
197
198
IEC 60309-2, Plugs, socket-outlets and couplers for industrial purposes – Part 2: Dimensional
interchangeability requirements for pin and contact -tube accessories
199
200
IEC 60364-4-41:2005, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
201
202
IEC 60364-5-55, Electrical installations of buildings – Part 5-55: Selection and erection of
electrical equipment – Other
203
204
IEC 60364-7 (all parts) Low-voltage electrical installations – Part 7: Requirements for special
installations or locations
205
IEC 60884-1, Plugs and socket-outlets for household and similar purposes – Part 1: General
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IEC 61084 (all parts), Cable trunking and ducting systems for electrical installations
207
IEC 61140, Protection against electric shock – Common aspects for installation and equipment
208
209
IEC 61386-21: Conduit systems for cable management – Part 21: Particular requirements –
Rigid conduit systems
210
211
IEC 61386-22: Conduit systems for cable management – Part 22: Particular requirements –
Pliable conduit systems
212
213
IEC 61386-23: Conduit systems for cable management – Part 23: Particular requirements –
Flexible conduit systems
214
717.3 Terms and definitions
215
For the purposes of this document, the following terms and definitions apply.
216
217
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
218
•
IEC Electropedia: available at https://www.electropedia.org/
219
•
ISO Online browsing platform: available at https://www.iso.org/obp
220
221
222
717.3.1
Mobile unit
structure containing an electrical installation, designed for being moved by its own means
223
EXAMPLE
224
225
226
717.3.2
Transportable unit
structure containing an electrical installation, designed for being moved by external means
227
EXAMPLE
outside-broadcasting van, emergency vehicle, catering lorry.
Containers for office, dwellings, storage.
228
229
717.31 Purposes, supplies and structure
230
717.312
Conductor arrangement and system earthing
231
717.312.2
Types of system earthing
232
Add the following:
233
234
235
Where a galvanically separated electric system is established within the unit, the chassis,
metallic frame and/or enclosure of the unit shall be considered to be the earth for that system.
See Figure 1.
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Key:
238
2
Main Earthing Terminal (MET)
239
3
Metallic frame of enclosure of the unit
Figure 1 – Example of an earth connection to the chassis
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241
717.312.2.1
TN Systems
242
Add the following:
243
A TN-C system shall not be used.
244
717.312.2.2
245
Add the following:
246
247
Where a galvanically separated electric system is established within the unit, a TT system shall
not be used.
248
717.313
249
Add the following:
250
251
Where both a DC system and AC system are earthed, inverters and power electronic converter
systems shall provide galvanic separation between AC side and DC side.
252
717.4 Protection for safety
253
717.41 Protection against electric shock
254
717.410
Introduction
255
717.410.3
General requirements
256
717.410.3.4
257
Replace the text in the Clause by:
258
259
260
Where an isolating transformer is provided in an incoming supply circuit to the unit, the incoming
circuit between its origin and the safety isolating transformer shall be protected in accordance
with 412.
261
Note: isolating transformers are covered by IEC 61558-2-4
TT Systems
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717.411
Protective measure: automatic disconnection of supply
263
717.411.3
Requirements for fault protection
264
717.411.3.1
Protective earthing and protective equipotential bonding
265
717.411.3.1.2 Protective equipotential bonding
266
Add the following:
267
The chassis shall be connected to the main earthing terminal within the unit.
268
717.411.3.2
269
717.411.3.2.1
270
717.411.3.2.1.101
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272
Where no isolating transformer is present in an incoming supply circuit to the unit, that incoming
supply circuit shall be protected by an RCD installed as close as possible to the origin of circuit.
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Between the origin of the incoming supply circuit and the isolating transformer or the RCD, the
protective measure specified in 412 shall be applied .
275
717.412
Protective measure: double or reinforced insulation
276
717.412.2
Requirements for basic protection and fault protection
277
717.412.2.101
278
279
280
Additional protection by residual current protective devices with a rated residual operating
current not exceeding 30 mA shall be provided for all final circuit supplying socket-outlets with
a rated current not exceeding 32 A.
281
717.44 Protection against voltage disturbances and electromagnetic disturbances
282
283
717.443
Protection against transient overvoltages of atmospheric origin or due to
switching
284
717.443.3
285
Replace the text in the Clause by the following :
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287
Where the unit is intended to be connected to an electrical installation supplied by a supply
distribution system, protection against transient overvoltage shall be provided.
288
717.5 Selection and erection of electrical equipment
289
717.51 Common rules
290
717.514
291
Add the following:
292
293
294
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 shall state in clear and
unambiguous terms the following:
295
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the type of supply which may be connected to the unit;
296
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the voltage rating of the unit;
Automatic disconnection in case of a fault
Overvoltage control
Identification
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the number of phases and their configuration;
298
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the on-board earthing arrangement;
299
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prospective short-circuit current required from the external supply:
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o
minimum short-circuit current to be provided from any external source ;
301
302
o
maximum short-circuit current provided from all external sources that may be
connected in parallel;
303
–
304
305
306
307
For socket-outlets individually protected by the protective measure electrical separation (see
IEC 60364-4-41:2005, 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.
308
717.52 Wiring systems
309
717.521
310
717.521.101
311
312
313
Where the means of connection the unit to an external supply is fixed connected to the unit,
and a cable is applied, this cable shall be in accordance with IEC 60245-4 and shall have a
cross-sectional area of the conductors of at least 2,5 mm 2 Cu.
314
717.521.102
315
The wiring systems shall be installed using one or more of the following:
316
317
a) insulated single-core cables, with flexible conductors or with stranded conductors (minimum
of 7 strands), in
the maximum power requirement of the unit.
Types of wiring systems
318
•
non-metallic conduits, or
319
•
non-metallic cable trunking systems, or
320
•
non-metallic cable ducting systems;
321
b) sheathed flexible cables.
322
All cables shall, as a minimum, meet the requirements of IEC 60227-3 and IEC 60332-1-2.
323
324
717.522
Devices for protection for safety, isolation, switching, control and
monitoring
325
717.531
Equipment for protection against electric shock
326
717.531.2
Devices for automatic disconnection of supply
327
717.531.2.3
Types of RCDs
328
717.531.2.3.3 Selection of type of RCD
329
717.531.2.3.3.1
330
717.531.2.3.3.1.101
331
The RCD required in 717.411.3.2.1.101 shall not be an RCD type AC.
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717.534
Devices for protection against transient overvoltages
333
717.534.4
Selection and erection of SPDs
334
717.534.4.1
SPD location and SPD test class
335
Add the following:
336
337
Where class I tested SPDs are required, SPDs shall be installed on the primary side of an
isolating transformer, if any.
338
717.534.4.6
339
Add the following:
340
Except for an IT system, connection type of the SPD shall be CT2.
341
717.54 Earthing arrangements and protective conductors
342
717.544
343
717.544.101
344
345
Protective bonding conductors shall comply with at least Class 5 flexible conductors according
to IEC 60228.
346
717.55 Other equipment
347
717.55.101
348
349
350
Plugs and socket-outlets shall comply with IEC 60309-1, IEC 60309-2 or IEC 60884-1, except
those dedicated for special equipment, such as broadcasting equipment where combined
connectors for information signals and power supply are used.
351
717.55.102
352
353
Connecting devices used to connect the unit to the supply shall comply with IEC 60309-1 or
IEC 60309-2, and with the following requirements:
354
–
plugs shall be situated on the unit;
355
356
–
plugs or appliance inlets shall provide protection against electric shock equivalent to the
protective measure of double insulation or reinforced insulation;
357
358
–
plugs shall provide a degree of protection of at least IP 44 according to IEC 60529, if
intended to be used outdoor;
359
360
–
appliance inlets with their enclosures shall provide a degree of protection of at least IP 55
according to IEC 60529;
361
717.55.103
362
363
Socket-outlets installed on the outside the unit shall provide a degree of protection of at least
IP 55 according to IEC 60529.
Fault protection
Protective bonding conductors
364
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Annex A
(informative)
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366
367
List of notes concerning certain countries
368
369
Country
GB
Clause
N°
717.411.4
Nature
(permanent
or less
permanent
according to
IEC
directives)
Rationale
(detailed
justification
for the
requested
country note)
UK has specific
provisions for the
use of certain
supplies
according to the
Electricity Safety,
Quality and
Continuity
Regulations 2002
Wording
In UK, A PME earthing facility shall
not be used as the means of
earthing for bmobile and
transportable units falling within the
scope of this section except where
one of the following applies:
(i) the installation is continuously
under the supervision of a skilled
person (electrically) or instructed
person (electrically), competent in
such work and the suitability and
effectiveness of the means of
earthing has been confirmed before
the connection is made, or
(ii) the unit is located within, or
outdoors on an upper storey or roof
of, a building or structure
containing the electrical installation
which supplies the unit.
JP
717.531.2.3.3.1.101
In Japan, add the Type AC RCD
(national standard) to
717.531.2.3.3.1.101
NL
717.521.11.101
In NL, Add:
717.52 Wiring systems
717.521 Types of wiring systems
717.521.11 Selection of cables
717.521.11.101
Electrical cables shall be selected
and applied in accordance with
Table 700.A.1 in
Appendix 700.A, provided they are
suitable for the applicable external
influences.
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Bibliography
373
374
IEC 60092-507, Electrical installations in ships – Part 507: Small vessels
375
376
IEC 60204-1:2005, Safety of machinery – Electrical equipment of machines – Part 1: General
requirements
377
378
IEC 60227-4, Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V
– Part 4: Sheathed cables for fixed wiring
379
IEC 60364-6, Low-voltage electrical installations – Part 6: Verification
380
381
IEC 61558-1, Safety of power transformers, power supplies, reactors and similar products –
Part 1: General requirements and tests
382
383
____________
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Internal