prEN IEC 61439-4:2022

Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)

NOTE Throughout this standard, the abbreviation ACS (ASSEMBLY for construction site, see 3.1.101) is used for a low-voltage switchgear and controlgear assembly intended for use on construction and similar sites. This part of 61439 defines the specific requirements of ACS as follows: - ASSEMBLIES for which the rated voltage does not exceed 1 000 V in case of AC or 1 500 V in case of DC; - ASSEMBLIES where the nominal primary voltage and the nominal secondary voltage of transformers incorporated in ACS are within the limits specified above; - ASSEMBLIES intended for use on construction sites, both indoors and outdoors, i.e. temporary places of work to which the public do not generally have access and where building construction, installation, repairs, alteration or demolition of property (buildings) or civil engineering (public works) or excavation or any other similar operations are carried out; - transportable (semi-fixed) or mobile ASSEMBLIES with enclosure. The manufacture and/or assembly may be carried out other than by the original manufacturer. This standard does not apply to individual devices and self-contained components, such as motor starters, fuse switches, electronic equipment, etc. which will comply with the relevant product standards. This standard does not apply to ASSEMBLIES for use in the administrative centres of construction sites (offices, cloakrooms, ASSEMBLY rooms, canteens, restaurants, dormitories, toilets, etc.). Requirements for electrical protection provided by equipment manufactured according to this International Standard are given in IEC 60364-7-704.

Niederspannungs-Schaltgerätekombinationen - Teil 4: Besondere Anforderungen für Baustromverteiler (BV)

Ensembles d'appareillage à basse tension - Partie 4: Exigences particulières pour ensembles de chantiers (EC)

Sestavi nizkonapetostnih stikalnih in krmilnih naprav - 4. del: Posebne zahteve za sestave na gradbiščih (ACS)

General Information

• Status: Not Published
• Publication Date: 03-Dec-2023
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• Technical Committee: CLC/SR 121B - Low-voltage switchgear and controlgear assemblies
• Drafting Committee: IEC/SC 121B - Low-voltage switchgear and controlgear assemblies
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 05-Aug-2022
• Completion Date: 05-Aug-2022
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: oSIST prEN IEC 61439-4:2022 - Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)

Relations

• Revises: EN 61439-4:2013 - Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)
• Effective Date: 26-Jul-2021

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN IEC 61439-4:2022
01-julij-2022

Sestavi nizkonapetostnih stikalnih in krmilnih naprav - 4. del: Posebne zahteve za

sestave na gradbiščih (ACS)

Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for

assemblies for construction sites (ACS)
Niederspannungs-Schaltgerätekombinationen - Teil 4: Besondere Anforderungen für
Baustromverteiler (BV)

Ensembles d'appareillage à basse tension - Partie 4: Exigences particulières pour

ensembles de chantiers (EC)
Ta slovenski standard je istoveten z: prEN IEC 61439-4:2022
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
91.200 Gradbena tehnologija Construction technology
oSIST prEN IEC 61439-4:2022 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 61439-4:2022
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oSIST prEN IEC 61439-4:2022
121B/151/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61439-4 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-05-13 2022-08-05
SUPERSEDES DOCUMENTS:
121B/142/CD, 121B/149/CC
IEC SC 121B : LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES
SECRETARIAT: SECRETARY:
Germany Mr Jörg Hußmann
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 64,SC 121A
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING

Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

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.
TITLE:

Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for

assemblies for construction sites (ACS)
PROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:

Copyright © 2022 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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1 CONTENTS

3 1 Scope ............................................................................................................................ 5

4 2 Normative references ..................................................................................................... 5

5 3 Terms and definitions ..................................................................................................... 6

6 3.1 General terms ........................................................................................................ 6

7 3.2 Constructional units of ASSEMBLIES ......................................................................... 6

8 3.3 External design of ASSEMBLIES ............................................................................... 6

9 3.5 Conditions of installation of ASSEMBLIES .................................................................. 7

10 4 Symbols and abbreviations ............................................................................................. 8

11 5 Interface characteristics .................................................................................................. 8

12 6 Information ..................................................................................................................... 8

13 7 Service conditions ........................................................................................................ 10

14 8 Constructional requirements ......................................................................................... 10

15 9 Performance requirements ............................................................................................ 13

16 10 Design verification ........................................................................................................ 13

17 11 Routine verification ....................................................................................................... 16

18 101 Particular features of ACS ............................................................................................ 16

19 Annex C (informative) User information template ................................................................ 20

20 Annex N (informative) List of notes concerning certain countries ......................................... 27

21 Annex AA (Void) ................................................................................................................. 28

23 Figure 101 – Impact test using striking element ................................................................... 15

25 Table 101 – Values of assumed loading .............................................................................. 18

26 Table C.1 – Items subject to agreement between the ASSEMBLY manufacturer and the

27 user .................................................................................................................................... 20

28 Table D.1 – List of design verifications to be performed ....................................................... 24

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32 INTERNATIONAL ELECTROTECHNICAL COMMISSION
33 ____________
35 LOW-VOLTAGE SWITCHGEAR AND
36 CONTROLGEAR ASSEMBLIES –
38 Part 4: Particular requirements for assemblies
39 for construction sites (ACS)
41 FOREWORD

42 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

43 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

44 international co-operation on all questions concerning standardization in the electrical and electronic fields. To

45 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

46 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

47 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

48 in the subject dealt with may participate in this preparatory work. International, governmental and non-

49 governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

50 with the International Organization for Standardization (ISO) in accordance with conditions determined by

51 agreement between the two organizations.

52 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

53 consensus of opinion on the relevant subjects since each technical committee has representation from all

54 interested IEC National Committees.

55 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

56 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

57 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

58 misinterpretation by any end user.

59 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

60 transparently to the maximum extent possible in their national and regional publications. Any divergence

61 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

62 the latter.

63 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

64 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

65 services carried out by independent certification bodies.

66 6) All users should ensure that they have the latest edition of this publication.

67 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

68 members of its technical committees and IEC National Committees for any personal injury, property damage or

69 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

70 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

71 Publications.

72 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

73 indispensable for the correct application of this publication.

74 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

75 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

76 International Standard IEC 61439-4 has been prepared by subcommittee 17D: Low-voltage

77 switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and

78 controlgear.

79 This first edition of IEC 61439-4 cancels and replaces the second edition of IEC 60439-4

80 (2004) and constitutes a technical revision.

81 This edition includes the following significant technical changes with respect to the last edition

82 of IEC 60439-4:

83 • modification of the title as “Part 4: Particular requirements for assemblies for construction

84 sites (ACS)”

85 • alignment on IEC 61439-1 regarding the structure and technical content, as applicable;

86 • to allow comparison with tested ACS.
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87 The text of this standard is based on the following documents:
FDIS Report on voting
17D/460/FDIS 17D/469/RVD

89 Full information on the voting for the approval of this standard can be found in the report on

90 voting indicated in the above table.

91 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

92 This standard is to be read in conjunction with IEC 61439-1. The provisions of the general

93 rules dealt with in IEC 61439-1 (hereinafter referred to as Part 1) are only applicable to this

94 standard insofar as they are specifically cited. When this standard states “addition”,

95 “modification” or “replacement”, the relevant text in Part 1 is to be adapted accordingly.

96 Subclauses that are numbered with a 101 (102, 103, etc.) suffix are additional to the same

97 subclause in Part 1.

98 Tables and figures in this Part 4 that are new are numbered starting with 101.

99 New annexes in this Part 4 are lettered AA, BB, etc.
100 In this standard, terms written in small capitals are defined in Clause 3.

101 The reader’s attention is drawn to the fact that Annex AA lists all of the “in-some-country”

102 clauses on differing practices of a less permanent nature relating to the subject of this

103 standard.

104 A list of all parts of the IEC 61439 series, under the general title Low-voltage switchgear and

105 controlgear assemblies, can be found on the IEC website.

106 The committee has decided that the contents of this publication will remain unchanged until

107 the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

108 related to the specific publication. At this date, the publication will be
109 • reconfirmed,
110 • withdrawn,
111 • replaced by a revised edition, or
112 • amended.
113
114
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115 LOW-VOLTAGE SWITCHGEAR AND
116 CONTROLGEAR ASSEMBLIES –
117
118 Part 4: Particular requirements for assemblies
119 for construction sites (ACS)
120
121
122 1 Scope

123 NOTE Throughout this standard, the abbreviation ACS (ASSEMBLY for construction site, see 3.1.101) is used for

124 a low-voltage switchgear and controlgear assembly intended for use on construction and similar sites.

125 This part of 61439 defines the specific requirements of ACS as follows:

126 – ASSEMBLIES for which the rated voltage does not exceed 1 000 V in case of AC or 1 500 V

127 in case of DC;

128 – ASSEMBLIES where the nominal primary voltage and the nominal secondary voltage of

129 transformers incorporated in ACS are within the limits specified above;

130 – ASSEMBLIES intended for use on construction sites, both indoors and outdoors, i.e.

131 temporary places of work to which the public do not generally have access and where

132 building construction, installation, repairs, alteration or demolition of property (buildings)

133 or civil engineering (public works) or excavation or any other similar operations are carried

134 out;
135 – transportable (semi-fixed) or mobile ASSEMBLIES with enclosure.

136 The manufacture and/or assembly may be carried out other than by the original manufacturer.

137 This standard does not apply to individual devices and self-contained components, such as

138 motor starters, fuse switches, electronic equipment, etc. which will comply with the relevant

139 product standards.

140 This standard does not apply to ASSEMBLIES for use in the administrative centres of

141 construction sites (offices, cloakrooms, ASSEMBLY rooms, canteens, restaurants, dormitories,

142 toilets, etc.).

143 Requirements for electrical protection provided by equipment manufactured according to this

144 International Standard are given in IEC 60364-7-704.
145 2 Normative references
146 This clause of Part 1 is applicable except as follows:
147 Addition:

148 IEC 60068-2-27:2008, Environmental testing − Part 2-27: Tests – Test Ea and guidance:

149 Shock

150 IEC 60068-2-42:2003, Environmental testing − Part 2-42: Tests – Test Kc: Sulphur dioxide

151 test for contacts and connections

152 IEC 60364-7-704, 2017, Low-voltage electrical installations − Part 7-704: Requirements for

153 special installations or locations – Construction and demolition site installations

154 IEC 61140, 2016, Protection against electric shock – Common aspects for installation and

155 equipment
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156 IEC 61439-1, 2020, Low-voltage switchgear and controlgear assemblies – Part 1: General

157 rules

158 IEC 61558-2-23, 2010 Safety of transformers, reactors, power supply units and combinations

159 thereof – Part 2-23: Particular requirements and tests for transformers and power supply units

160 for construction sites
161 3 Terms and definitions
162 This clause of Part 1 is applicable except as follows:
163 Additional terms:
164 3.1 General terms
165 3.1.101
166 low-voltage switchgear and controlgear assembly for construction sites
167 ACS

168 combination of one or several transforming or low voltage switching devices with associated

169 control, measuring, signalling, protective and regulating equipment complete with all their

170 internal electrical and mechanical connections and structural parts, designed and built for use

171 on all construction sites, indoors and outdoors
172 3.2 Constructional units of ASSEMBLIES
173 3.2.101
174 metering unit
175 functional unit equipped with apparatus for metering electrical energy
176 3.2.102
177 transformer unit
178 functional unit consisting mainly of one or several transformers
179 Modifications:
180 3.3 External design of ASSEMBLIES
181 3.3.1
182 open-type ASSEMBLY
183 This term of Part 1 does not apply.
184 3.3.2
185 dead-front ASSEMBLY
186 This term of Part 1 does not apply.
187 Replacements:
188 3.3.3
189 enclosed ACS

190 ACS which is enclosed on all sides with the possible exception of its mounting surface in such

191 a manner as to provide a defined degree of protection
192 3.3.7
193 box-type ACS
194 enclosed ACS intended:
195 – either to be mounted on a vertical surface;
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196 – or to stand on a horizontal surface supported by feet or legs (articulated or not) or by a

197 mounting not forming part of the ACS (see 3.4.2 of Part 1)
198 Modifications:
199 3.5 Conditions of installation of ASSEMBLIES
200 3.5.1
201 ASSEMBLY for indoor installation
202 This term of Part 1 does not apply (see 3.1.101).
203 3.5.2
204 ASSEMBLY for outdoor installation
205 This term of Part 1 does not apply (see 3.1.101).
206 3.5.3
207 ASSEMBLY
stationary
208 This term of Part 1 does not apply.
209 3.5.4
210 movable ASSEMBLY
211 This term of Part 1 does not apply.
212 Additional terms:
213 3.5.101
214 transportable ACS
215 semi-fixed ACS

216 ACS intended for use in a place where it is not permanently fixed; its location may vary during

217 work on the same site. When the equipment shall be moved to another place, it is first

218 disconnected from the supply
219 3.5.102
220 mobile ACS

221 ACS capable of being moved as work advances on the site, without being disconnected from

222 the supply
223
224 Additional terms:
225 3.101 Function of the ACS
226 3.101.1
227 incoming supply function

228 suitability for connection of the ACS either to electricity public supply network or to the

229 transformer substation or to on site generator
230 3.101.2
231 metering function
232 suitability for the metering of electrical energy consumed on the site
233 3.101.3
234 distribution function

235 suitability to provide the distribution and protection of electrical supply on the construction site

236 by means of terminal connection or socket-outlets
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237 3.101.4
238 transformer function

239 suitability to provide means for transformer voltages or to provide measures of electrical

240 protection
241 Note 1 to entry: Details for their requirements are given in 101.1.
242 4 Symbols and abbreviations
243 This clause of Part 1 is applicable.
244 5 Interface characteristics
245 This clause of Part 1 is applicable except as follows.
246 ASSEMBLY (I )
5.3.1 Rated current of the
247 Replacement of title and text:
248 5.3.1 Rated current of an ACS (I )
249 The rated current of an ACS is that of its incoming circuit.

250 This current shall be carried without the temperature rise of the individual parts exceeding the

251 limits specified in 9.2 of Part 1.
252 5.4 Rated diversity factor (RDF)
253 Addition:

254 The assumed loading of the outgoing circuits of the ACS or group of outgoing circuits shall be

255 declared by the ASSEMBLY manufacturer and may be based on the values in Table 101.

256 When the manufacturer does not declare any RDF the values of Table 101 apply.

257 5.6 Other characteristics
258 Replacement:
259 The following characteristics shall be declared:
260 a) the function(s) assigned by the manufacturer (see 3.101);
261 b) the external design (see 3.3);
262 c) the mobility (see 3.5.101 and 3.5.102);
263 d) the degree of protection (see 8.2);

264 e) the method of mounting, for example fixed or removable parts (see 8.5.1 and 8.5.2);

265 f) protection against electric shock (see 8.4);
266 g) the resistance to corrosion (see 10.2.2.101);
267 h) special service conditions, if applicable (see 7.2);

268 i) electromagnetic compatibility (EMC) classification (see Annex J of Part 1).

269 6 Information
270 This clause of Part 1 is applicable except as follows.
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271 6.1 ASSEMBLY designation marking
272 Replacement of title and text:
273 6.1 ACS designation marking

274 ASSEMBLY manufacturer shall provide each ACS with one or more labels, marked in a

The

275 durable manner and located in a place such that they are visible and legible when the ACS is

276 installed and in operation.
277 Compliance is checked according to the test of 10.2.7 and by inspection.

278 The following information regarding the ACS shall be provided on the label(s):

279 a) ASSEMBLY manufacturer's name or trade mark (see 3.10.2);

280 b) type designation or identification number or any other means of identification, making it

281 possible to obtain relevant information from the ASSEMBLY manufacturer;
282 c) means of identifying date of manufacture;
283 d) IEC 61439-4;
284 e) type of current (and the frequency in the case of AC);
285 f) rated voltage (Un) (of the ACS) (see 5.2.1);
286 g) rated current of the ACS (InA) (see 5.3.1);
287 h) degree of protection (see 8.2);
288 i) the weight where this exceeds 30 kg.

289 If the indication of the name or trademark of the manufacturer appears on the ACS it need not

290 be given on the nameplate.
291 6.2.1 Information relating to the ASSEMBLY
292 Replacement of title and text:
293 6.2.1 Information relating to the ACS

294 The following additional information, where applicable, shall be provided in the ASSEMBLY

295 manufacturer’s technical documentation supplied with the ACS:
296 a) rated operational voltage (Ue) (of a circuit) (see 5.2.2);
297 b) rated impulse withstand voltage (U ) (see 5.2.4);
imp
298 c) rated insulation voltage (Ui) (see 5.2.3);
299 d) rated current of each circuit (I ) (see 5.3.2);
300 e) rated peak withstand current (Ipk) (see 5.3.4);

301 f) rated short-time withstand current (I ) together with its duration (see 5.3.4);

302 g) rated conditional short-circuit current (Icc) (see 5.3.5);
303 h) rated frequency (f ) (see 5.5);
304 i) rated diversity factor(s) (RDF) (see 5.4);
305 j) functions (see 3.101);

306 k) all necessary information relating to the other declared classifications and characteristics

307 (see 5.6);

308 l) the short-circuit withstand strength and characteristics of short-circuit protective device(s)

309 (see 9.3.2);
310 m) overall dimensions (including projections e.g handles, covers, doors).
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311 6.2.2 Instructions for handling, installation, operation and maintenance
312 Addition:

313 The manufacturer of the ACS should specify in its technical documentation supplied with the

314 ACS the other types of assemblies which may be connected to it. This information should

315 indicate whether the compatibility is based upon the type of system earthing employed and/or

316 on the need for co-ordination of the electrical protection within the complete installation.

317 The manufacturer should furnish the appropriate documentation for the purpose to maintain

318 the protective measures and the co-ordination of the protective devices within the complete

319 installation.
320 7 Service conditions
321 This clause of Part 1 is applicable except as follows.
322 Modifications:
323 7.1.2 Pollution degree
324 Replacement of the last paragraph with:
325 Only pollution degrees 3 and 4 are applicable.

326 The microenvironment may be reduced to pollution degree 2 if the degree of protection of the

327 enclosure is at least IP5X and care is taken to avoid condensation.
328 7.2 Special service conditions
329 Addition of the following new item:
330 m) heavily polluted atmosphere.
331 8 Constructional requirements
332 This clause of Part 1 is applicable except as follows.
333 8.1.1 General
334 Addition:

335 All the apparatus shall be placed inside the enclosure fitted with such removable panels,

336 cover plates or doors as may be required for connection or maintenance with the possible

337 exception of the items mentioned in 8.101 provided that they withstand the service conditions

338 of Clause 7 and the requirements of 8.1.2 and 8.1.6.
339 8.1.2 Protection against corrosion
340 Replacement:

341 Protection against corrosion shall be ensured by the use of suitable materials or by protective

342 coatings to the exposed surface taking account of the normal service conditions (see 7.1)

343 and/or special service condition (see 7.2). Compliance to this requirement is checked by the

344 test of 10.2.2.
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345 8.1.4 Resistance to ultra-violet radiation
346 Replacement:

347 For enclosures and external parts made of insulating materials, resistance to ultra-violet

348 radiation shall be verified according to 10.2.4.

349 For external parts made of insulating material of components covered by other IEC standard

350 (for examples socket-outlets, handles of switch, push buttons etc) this test is not required.

351 8.1.5 Mechanical strength
352 Addition:

353 The ACS shall be constructed to withstand mechanical shocks having an acceleration of

354 , a pulse shape of a half-sine wave of 11 ms duration (commensurate with equipment

500 m/s
355 being carried loose in normal road or rail vehicles for long periods).
356 Compliance is verified according to 10.2.6.
357 8.1.6 Lifting provision
358 Replacement:

359 Lifting rings and/or handles (or any other equivalent system) shall be provided on the ACS

360 and be firmly attached to the enclosure or supporting framework.
361 Compliance is checked according to the test of 10.2.5.
362 8.2.1 Protection against mechanical impact
363 Additional paragraph:

364 The ACS shall also withstand impacts of 6 joules energy representing collisions with site

365 construction mechanical handling equipment (see IEC 60068-2-27).
366 For protection against mechanical impact refer to 10.2.6.

367 8.2.2 Protection against contact with live parts, ingress of solid foreign bodies and

368 water
369 Replacement:

370 The degree of protection provided by an ACS against contact with live parts, ingress of solid

371 foreign bodies and water is indicated by the IP code according to IEC 60529 and verified

372 according to 10.3.

373 The degree of protection of the ACS shall be at least IP 44, with all doors closed and all

374 removable panels and cover plates fitted.
375 Ventilation and drainage holes shall not reduce this degree of protection.

376 The degree of protection for an operating face inside a door shall be not less than IP 21

377 provided that the door can be closed under all conditions of use. Where the door cannot be

378 closed the degree of protection for the operating face shall be at least IP 44.

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379 Unless otherwise specified, the degree of protection indicated by the original manufacturer

380 applies to the complete ACS, when it is installed in accordance with the original

381 manufacturer's instructions.

382 Socket-outlets not protected by the enclosure of the ACS shall have a degree of protection at

383 least equivalent to IP 44, both when the plug is removed or fully inserted.

384 Where the ACS does not have the same IP rating throughout, the original manufacturer shall

385 declare in its technical documentation supplied with the ACS the IP rating for the separate

386 parts. Example: IP 44, operating face IP 21.

387 No IP codes may be given unless the appropriate verifications have been made according to

388 10.3.
389 8.4.3.1 Installation conditions
390 Replacement of the first two paragraphs:

391 The ACS shall include protective measures and be suitable for installations designed to be in

392 accordance with IEC 60364-7-704:2017
393 8.4.4 Additional requirements for class II assemblies
394 e) This item of Part 1 is not applicable.

395 8.4.6.2 Requirements related to accessibility in service by authorized persons

396 This subclause of Part 1 is not applicable.
397 8.5.3 Selection of switching devices and components
398 Additional paragraphs:

399 Plugs of different rated currents or voltages shall not be interchangeable, so as to avoid

400 errors in connecting (see IEC 60309-1 and IEC 60309-2).

401 Connections for three-phase socket-outlets shall be made in such a way as to retain the same

402 order of phases.
403 Additional subclause:
404 8.5.101 Accessible parts of ACS

405 Only the socket-outlets, operating handles and control buttons may be accessible without the

406 use of a key or tool. The actuator of the main switch shall be easily accessible (see

407 704.536.2.2 of IEC 60364-7-704:2017).
408 8.8 Terminals for external conductors
409 Addition after the third paragraph:

410 All connections for external cables shall be re-wireable or shall be socket-outlets. Socket-

411 outlets shall conform with the relevant standards and have a current rating of at least 16 A.

412 Additional subclauses:
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oSIST prEN IEC 61439-4:2022
IEC CDV 61439-
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