SIST EN 60439-4:2005

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

Applies to type-tested ASSEMBLIES (TTA) intended for use on construction sites, 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. These ASSEMBLIES may be transportable (semi-fixed) or mobile. 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.). The nominal primary voltage and the nominal secondary voltage of transformers incorporated in ACS shall be within the limits specified in EN 60439-1. Requirements for electrical protection provided by equipment manufactured according to this International Standard shall comply with the requirements given in EN 60364-7-704. NOTE: This standard may be used as a guide to partially type-tested ASSEMBLIES (PTTA) constructed according to agreement between manufacturer and user taking into account the nature of supply and/or distribution network and relevant installation requirements. The following major changes with respect to edition 1 (including amendments 1 and 2) have been incorporated: - introduction of the definition for rated current of ACS; - replacement of classification based on the rated current of ACS by classification based on the function as assigned by the manufacturer; - amended requirements for the protection of socket-outlets with reference to the more comprehensive requirements of EN 60364-7-704; - introduction of common requirements for all types of ACS.

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

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

S'applique aux ENSEMBLES de série (ES) destinés à équiper des chantiers, c'est-à-dire des lieux de travail temporaires qui ne sont pas normalement accessibles au public et où sont exécutés des travaux de construction, d'équipement, de réparation, de modification ou de démolition d'immeubles (bâtiments) ou d'ouvrage d'art (travaux publics) ou encore des travaux de terrassement ou tout autres travaux analogues. Ces ENSEMBLES peuvent être de type transportable (semi-fixe) ou mobile. La présente norme ne s'applique pas aux ENSEMBLES destinés à être utilisés dans les locaux de service des chantiers (bureaux, vestiaires, salles de réunion, cantines, restaurants, dortoirs, locaux sanitaires, etc.). Les valeurs nominales des tensions primaire et secondaire des appareils de transformation incorporés dans les ensembles de chantier (EC) doivent être dans les limites fixées dans la EN 60439-1. Les exigences de protection électrique fournies par l'équipement fabriqué selon la présente norme internationale doivent satisfaire aux exigences données dans la EN 60364-7-704. NOTE: La présente norme peut être utilisée comme un guide pour les ENSEMBLES dérivés de série (EDS), fabriqués selon accord entre constructeur et utilisateur et prenant en compte la nature du réseau d'alimentation et/ou de distribution et les exigences de l'installation concernée. Les modifications majeures suivantes par rapport à la première édition (y compris les amendements 1 et 2) ont été incorporées: - introduction de la définition pour courant assigné de l'EC; - remplacement de la classification basée sur le courant assigné de l'EC par une classification basée sur la fonction telle qu'attribuée par le constructeur; - prescriptions modifiées pour la protection des socles de prises de courant avec référence à des prescriptions plus compréhensibles de la EN 60364-7-704; - introduction de prescriptions communes pour tous les types d'EC.

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

General Information

• Status: Withdrawn
• Publication Date: 31-Jan-2005
• Withdrawal Date: 01-Jun-2016
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• ICS: 91.200 - Construction technology
• Technical Committee: SKA - Switchgear and control gear
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 02-Jun-2016
• Due Date: 25-Jun-2016
• Completion Date: 02-Jun-2016
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Ref Project: EN 60439-4:2004 - Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)

Relations

• Revised: SIST EN 61439-4:2013 - Low-voltage switchgear and controlgear assemblies - Part 4: Assemblies for construction sites (ACS) (IEC 61439-4:2012)
• Effective Date: 06-May-2014
• Replaced By: SIST EN 61439-4:2013 - Low-voltage switchgear and controlgear assemblies - Part 4: Assemblies for construction sites (ACS) (IEC 61439-4:2012)
• Effective Date: 29-Jan-2023
• Replaced By: SIST EN 61439-4:2013 - Low-voltage switchgear and controlgear assemblies - Part 4: Assemblies for construction sites (ACS) (IEC 61439-4:2012)
• Effective Date: 07-Jun-2022
• Replaces: SIST EN 60439-4:1995/A11:2004 - Low-voltage switchgear and controlgear assemblies -- Part 4: Particular requirements for assemblies for construction sites (ACS)
• Effective Date: 29-Jan-2023
• Replaces: SIST EN 60439-4:1995 - Low-voltage switchgear and controlgear assemblies -- Part 4: Particular requirements for assemblies for construction sites (ACS)
• Effective Date: 29-Jan-2023
• Replaces: SIST EN 60439-4:1995/A1:2000 - Low-voltage switchgear and controlgear assemblies -- Part 4: Particular requirements for assemblies for construction sites (ACS)
• Effective Date: 29-Jan-2023
• Replaces: SIST EN 60439-4:1995 - Low-voltage switchgear and controlgear assemblies -- Part 4: Particular requirements for assemblies for construction sites (ACS)
• Effective Date: 07-Jun-2022
• Replaces: SIST EN 60439-4:1995/A2:2000 - Low-voltage switchgear and controlgear assemblies -- Part 4: Particular requirements for assemblies for construction sites (ACS)
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60439-4:2005
01-februar-2005
1DGRPHãþD
SIST EN 60439-4:1995
SIST EN 60439-4:1995/A1:2000
SIST EN 60439-4:1995/A11:2004
SIST EN 60439-4:1995/A2:2000
6HVWDYLQL]NRQDSHWRVWQLKVWLNDOQLKLQNUPLOQLKQDSUDY±GHO3RVHEQH]DKWHYH]D
VHVWDYHQDJUDGELãþLK$&6
Low-voltage switchgear and controlgear assemblies -- Part 4: Particular requirements for
assemblies for construction sites (ACS)
Niederspannungs-Schaltgerätekombinationen -- Teil 4: Besondere Anforderungen an
Baustromverteiler (BV)
Ensembles d'appareillage à basse tension -- Partie 4: Règles particulières pour
ensembles de chantier (EC)
Ta slovenski standard je istoveten z: EN 60439-4:2004
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
91.200 Gradbena tehnologija Construction technology
SIST EN 60439-4:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60439-4:2005

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SIST EN 60439-4:2005

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SIST EN 60439-4:2005

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SIST EN 60439-4:2005

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SIST EN 60439-4:2005

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SIST EN 60439-4:2005

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SIST EN 60439-4:2005
NORME CEI
INTERNATIONALE
IEC



60439-4
INTERNATIONAL


Deuxième édition
STANDARD

Second edition

2004-06


Ensembles d'appareillage à basse tension –
Partie 4:
Règles particulières pour ensembles
de chantier (EC)

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

 IEC 2004 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
CODE PRIX
R
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 3 –
CONTENTS

FOREWORD.5

1 General .9
1.1 Scope and object.9
1.2 Normative references .9
2 Definitions .11
3 Classification of ASSEMBLIES .15
4 Electrical characteristics of ASSEMBLIES .15
5 Information to be given regarding the ASSEMBLY .15
5.1 Nameplates .15
6 Service conditions .17
6.1 Normal service conditions .17
7 Design and construction .19
7.1 Mechanical design.19
7.2 Enclosure and degree of protection .21
8 Test specifications.27
8.1 Classification of tests .27
8.2 Type tests .27

Figure 101 – Impact test using striking element .39
Figure 102 – Temperature and humidity profiles .39

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES –

Part 4: Particular requirements for assemblies for construction sites (ACS)


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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.
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.
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.
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.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
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.
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.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60439-4 has been prepared by subcommittee 17D: Low-voltage
switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and
controlgear.
This second edition of IEC 60439-4 cancels and replaces the first edition (1990),
amendment 1 (1995) and amendment 2 (1999). It constitutes a technical revision.
The following major changes with respect to edition 1 (including amendments 1 and 2) have
been incorporated:
– introduction of the definition for “rated current of ACS”;
– replacement of classification based on the rated current of ACS by classification based on
the function as assigned by the manufacturer;
– amended requirements for the protection of socket-outlets with reference to the more
comprehensive requirements of IEC 60364-7-704;
– introduction of common requirements for all types of ACS.

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 7 –
The text of this standard is based on the first edition, amendments 1 and 2, and the following
documents:
FDIS Report on voting
17D/301/FDIS 17D/303/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.
Assemblies for construction sites (ACS) shall comply with all requirements of IEC 60439-1
(1999) if not otherwise indicated hereinafter and shall also comply with the particular
requirements contained in this publication.
The clauses and subclauses of this standard supplement, modify or replace the respective
clauses and subclauses in IEC 60439-1:1999.
In view of the fact that this publication should be read in conjunction with IEC 60439-1, the
numbering of its clauses and subclauses correspond to the latter.
Where there is no corresponding clause or subclause in this standard, the clause or
subclause of the main document applies without modification.
Subclauses and figures which are additional to those in part 1 are numbered starting from
101.
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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SIST EN 60439-4:2005
60439-4  IEC:2004 – 9 –
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES –

Part 4: Particular requirements for assemblies for construction sites (ACS)


1 General
1.1 Scope and object
Replace the last three paragraphs by the following:
This standard applies to type-tested ASSEMBLIES (TTA) intended for use on construction sites,
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.
These ASSEMBLIES may be transportable (semi-fixed) or mobile.
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.).
The nominal primary voltage and the nominal secondary voltage of transformers incorporated
in ACS shall be within the limits specified in IEC 60439-1.
Requirements for electrical protection provided by equipment manufactured according to this
International Standard shall comply with the requirements given in IEC 60364-7-704.
NOTE This standard may be used as a guide to partially type-tested ASSEMBLIES (PTTA) constructed according to
agreement between manufacturer and user taking into account the nature of supply and/or distribution network and
relevant installation requirements.
1.2 Normative references
This subclause of Part 1 applies with the following additions:
IEC 60068-2-27:1987, Environmental testing − Part 2: Tests - Test Ea and guidance: Shock
IEC 60068-2-42:2003, Environmental testing − Part 2-42: Tests - Test Kc: Sulphur dioxide
test for contacts and connections
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 60364-4-41:2001, Electrical installations of buildings − Part 4-41: Protection for safety -
Protection against electric shock
IEC 60364-5-53:2001, Electrical installations of buildings – Part 5-53: Selection and erection
of electrical equipment – Isolation, switching and control
IEC 60364-7-704:1989, Electrical installations of buildings − Part 7: Requirements for special
installations or locations - Section 704: Construction and demolition site installations

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 11 –
IEC 60439-1:1999, Low-voltage switchgear and controlgear assemblies – Part 1: Type-tested
and partially type-tested assemblies
IEC 61140:2001, Protection against electric shock – Common aspects for installation and
equipment
IEC 61201:1992, Extra-low voltage (ELV) – Limit values
IEC 61558 (all parts), Safety of power transformers, power supply units and similar devices
IEC 61558-2-23, Safety of power transformers, power supply units and similar devices –
Part 2-23: Particular requirements for transformers for construction sites
2 Definitions
The definitions of Part 1 apply with the following additions and modifications:
2.1.1.2
partially type-tested low-voltage switchgear and controlgear assembly (PTTA)
Not applicable
NOTE See also the note under Clause 1 of this standard.
2.1.101
low-voltage switchgear and controlgear assembly for construction sites (ACS)
combination of one or several transforming or switching devices with associated control,
measuring, signalling, protective and regulating equipment complete with all their internal
electrical and mechanical connections and structural parts (see 2.4), designed and built for
use on all construction sites, indoors and outdoors
2.1.102
metering unit
functional unit equipped with apparatus for metering electrical energy
2.1.103
transformer unit
functional unit consisting mainly of one or several transformers
2.3.1
open-type ASSEMBLY
Not applicable
2.3.2
dead-front ASSEMBLY
Not applicable
2.3.3
enclosed ACS
ACS which is enclosed on all sides

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 13 –
2.3.3.4
box-type ACS
enclosed ACS intended
– either to be mounted on a vertical surface;
– or to stand on a horizontal surface supported by feet or legs (articulated or not) or by a
mounting not forming part of the ACS (see 2.4.2).
2.3.4
busbar trunking system
Not applicable
2.5.1
ASSEMBLY for indoor installation
Not applicable (see 2.1.101)
2.5.2
ASSEMBLY for outdoor installation
Not applicable (see 2.1.101)
2.5.3
stationary ASSEMBLY
Not applicable
2.5.4
movable ASSEMBLY
Not applicable
2.5.101
transportable (or semi-fixed) ACS
ACS intended for use in a place where it is not permanently fixed; its location may vary during
work on the same site. When the equipment is to be moved to another place, it is first
disconnected from the supply
2.5.102
mobile ACS
ACS capable of being moved as work advances on the site, without being disconnected from
the supply
2.7
gangways within ASSEMBLIES
Not applicable
2.101
function of the ACS
2.101.1
incoming supply function
suitability for connection of the construction site assembly either to electricity public supply
network or to the transformer substation or to on-site generator
2.101.2
metering function
suitability for the metering of electrical energy consumed on the site

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 15 –
2.101.3
distribution function
suitability to provide the distribution and protection of electrical supply on the construction site
by means of permanent cabling or socket-outlets
2.101.4
transformer function
suitability to provide means for transformer voltages or to provide measures of electrical
protection
2.102
series of compatible assemblies for construction sites
ACS intended to be interconnected to form an installation or part of an installation
NOTE Details for their requirements are given in 101.1.
3 Classification of ASSEMBLIES
ACS are classified according to
– the function(s) assigned by the manufacturer (see 2.101);
– the external design (see 2.3);
– the mobility (see 2.5.101 and 2.5.102);
– the type of enclosure (see 7.1.1);
– the degree of protection (see 7.2.1);
– the method of mounting, for example fixed or removable parts (see 7.6.3 and 7.6.4);
– the measures for the protection of persons (see 7.4);
– the form of internal separation (see 7.7);
– the types of electrical connections of functional units (see 7.11);
– the resistance to corrosion (see 7.1.101).
4 Electrical characteristics of ASSEMBLIES
4.101 Rated current of an ACS
The rated current of an ACS is that stated by the manufacturer as the rated current of its
incoming circuit. This current shall be carried without the temperature rise of the individual
parts exceeding the limits specified in 7.3 when tested according to 8.2.1.
5 Information to be given regarding the ASSEMBLY
5.1 Nameplates
Each ACS shall be provided with one or more plates marked in a durable manner and located
in a place such that they are visible and legible when the ASSEMBLY is installed. Information
from a) to g) below shall be given on the nameplate. However, if the indication of the name or
trademark of the manufacturer appears on the ACS it need not be given on the nameplate.
Information from h) to s) may, where applicable, be given on the nameplates, in the relevant
documents, on the circuit diagrams or in the manufacturer's catalogues. However, if the
weight of a unit exceeds 30 kg the weight shall be indicated on the nameplate.

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 17 –
a) The manufacturer's name or trademark of the ACS.
NOTE The manufacturer is deemed to be the organisation taking the responsibility for the completed
ASSEMBLY.
b) Type designation or identification number or other means of identification making it
possible to obtain relevant information from the manufacturer.
c) IEC 60439-4.
d) Type of current (and the frequency in the case of a.c.).
e) Rated operational voltages (see 4.1.1).
f) Rated current of ACS (see 4.101).
g) Degree of protection (see 7.2.1).
h) Rated insulation voltage (see 4.1.2) and rated impulse withstand voltage, when declared
by the manufacturer (see 4.1.3).
i) Short-circuit withstand strength (see 7.5.2.1).
l) Service conditions for special use, if different from the usual service conditions as given in
6.1.
m) Type(s) of system(s) earthing for which the ACS is designed (see 7.4.3).
n) Dimensions.
o) Weight, see above.
p) Form of internal separation (see 7.7).
q) Types of electrical connections of functional units (see 7.11).
r) Resistance to corrosion (see 7.1.101), if different from the one corresponding the normal
service conditions.
s) Function(s) (see 2.101).
5.3 Instructions for installation, operation and maintenance
Add the following paragraph:
The manufacturer of the ASSEMBLY should specify on a notice attached to the ASSEMBLY the
other types of ASSEMBLIES which may be connected to it. The notice should indicate whether
the compatibility is based upon the type of system earthing employed and/or on the need for
co-ordination of the electrical protection within the complete installation.
NOTE The manufacturer should furnish the appropriate documentation for the purpose to maintain the protective
measures and the co-ordination of the protective devices within the complete installation.
6 Service conditions
6.1 Normal service conditions
6.1.1 Ambient air temperature
6.1.1.1 Ambient air temperature for indoor installations
Not applicable.
6.1.2 Atmospheric conditions
6.1.2.1 Atmospheric conditions for indoor installations
Not applicable.

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 19 –
6.1.2.3 Pollution degree
Only pollution degrees 3 and 4 are applicable.
7 Design and construction
7.1 Mechanical design
7.1.1 General
Add the following paragraphs:
ACS shall be type-tested low-voltage switchgear and controlgear assemblies (TTA).
All the apparatus shall be placed inside an enclosure fitted with such removable panels, cover
plates or doors as may be required for connection or maintenance with the possible exception
of the items mentioned in 7.2.3, provided that they withstand the service conditions of
Clause 6, 7.1.101 and 7.1.102.
7.1.3.2 Replace the last paragraph by:
All connections for external cables shall be re-wireable or shall be socket-outlets. Socket-
outlets shall conform with the relevant standards and have a current rating of at least 16 A.
NOTE In Australia socket outlets for industrial use with lower current are used.
7.1.3.4 Note 2 is not applicable.
7.1.3.6 Replace by:
Openings in cable entries, cover plates, etc., shall be such that, when the cables, including
their anchoring devices, are properly installed, the stated protective measures against contact
with live parts and the stated degree of protection shall be obtained. The devices for cable
entry are to be specified by the manufacturer and indicated in his instructions.
7.1.101 Protection against corrosion
The ACS shall be protected against corrosion either by the use of suitable materials or by
coating the exposed surfaces.
The resistance to corrosion shall be verified by the tests specified in 8.2.102.1 or 8.2.102.2.
The test in 8.2.102.1 applies to equipment operating under normal service conditions and the
test in 8.2.102.2 applies to equipment operating in heavily polluted atmospheres.
7.1.102 Mechanical strength
The ACS shall be constructed to withstand mechanical shocks having an acceleration of
2
500 m/s , a pulse shape of a half-sine wave of 11 ms duration (commensurate with equipment
being carried loose in normal road or rail vehicles for long periods). The ACS shall also
withstand impacts of 6 J energy representing collisions with site construction mechanical
handling equipment (see IEC 60068-2-27).

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 21 –
7.2 Enclosure and degree of protection
Replace the text of the following subclauses by:
7.2.1.1 The degree of protection provided by an ACS against contact with live parts, ingress
of solid foreign bodies and liquid is indicated by the designation IP. according to IEC 60529.
The degree of protection of all parts of the ACS shall be at least IP44, with all doors closed
and all removable panels and cover plates fitted.
Ventilation and drainage holes shall not reduce this degree of protection.
NOTE In Spain wiring rules (RD 842/2002) require a minimum degree of protection of IP45 for enclosures,
switchgear and controlgear, socket-outlets and other installation elements intended for outdoor construction sites.
The degree of protection for an operating face inside a door shall be not less than IP21
provided that the door can be closed under all conditions of use. Where the door cannot be
closed the degree of protection for the operating face shall be at least IP44.
7.2.1.2 Not applicable.
7.2.1.3 Unless otherwise specified, the degree of protection indicated by the manufacturer
applies to the complete ACS, when it is installed in a working position in accordance with the
manufacturer's instructions (see also 7.1.3.6).
Socket-outlets not protected by the enclosure of the ACS shall have a degree of protection at
least equivalent to IP44, both when the plug is removed or fully inserted.
7.2.1.4 If the degree of protection of an internal part of the ACS differs from that of the main
part, the manufacturer shall indicate separately the degree of protection presented by that
part.
EXAMPLE IP44 – operating face IP21.
This information may be shown in a catalogue or in operating instructions of the ACS or of the
unit.
7.2.1.6 Not applicable.
7.2.101 Accessible parts of ACS
Only the socket-outlets, operating handles and control buttons may be accessible without the
use of a key or tool. The actuator of the main switch shall be easily accessible (see
Clause 704.537 of IEC 60364-7-704).
7.2.102 Supports and securing devices of ACS
Every ACS shall be fitted with supports enabling it to stand on a horizontal surface (e.g. feet
or legs, articulated or not) and/or a system for fixing it to a vertical wall, attached to the
enclosure or supporting framework.
These various supports or securing devices shall be external to the enclosure but firmly
attached to it. They shall be appropriate to the constructional features (weight, environment,
etc.) and service characteristics of the ACS.
All ACS shall be so designed as to minimize mechanical damage to components such as
socket-outlets and any plugs connected to socket-outlets.

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 23 –
The cable outlet shall be at a minimum distance from the ground compatible with the radius of
curvature of the largest cable that may be connected to the ACS.
7.2.103 Lifting and handling devices of ACS
Lifting rings and/or handles (or any other equivalent system) shall be provided on the ACS
and be firmly attached to the enclosure or supporting framework.
7.4 Protection against electric shock
7.4.2 Protection against direct contact (see 2.6.8)
Replace by:
Protection against direct contact shall be achieved by the design and construction of the ACS.
One or more of the protective measures defined below may be selected taking into account
the requirements laid down in the following subclauses.
7.4.2.2.1 Replace by:
All external surfaces shall present a degree of protection not less than that specified in
7.2.1.1. The distance between the mechanical means provided for protection and the live
parts they protect shall be not less than the values specified for the clearances and creepage
distances in 7.1.2 unless these mechanical means are of insulating material.
7.4.2.2.3 Paragraph d) is not applicable.
7.4.2.3 Protection by obstacles
Not applicable.
7.4.3 Protection against indirect contact
Replace by:
It is up to the user to indicate the protective measures he chooses from the following
specifications. In addition, attention is drawn to IEC 60364-7-704 in which requirements
concerning protection against indirect contact are given for the complete installation.
7.4.3.1.1 The second paragraph is not applicable.
7.4.3.1.5 Replace paragraph e) by the following:
e) When the enclosure of an ACS is used as part of the protective circuit, the following
conditions shall be fulfilled:
– the electrical continuity shall be protected against mechanical, chemical and electro-
chemical deterioration;
– the conductance shall be at least equal to that referred to in 7.4.3.1.7;
– it shall be possible to connect additional protective conductors at any pre-determined
tap-off point.
Add to paragraph f):
When plug and socket devices are used, it is essential that a suitable protective conductor be
connected between the main earthing terminals of the ACS and the earthing terminals of the
socket-outlets.

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SIST EN 60439-4:2005
60439-4  IEC:2004 – 25 –
7.4.3.1.7 Add paragraph c):
c) The cross-sectional area of every protective conductor within an ACS which does not form
2
part of a cable or cable enclosure shall be not less than 2,5 mm .
7.4.3.2.2 Protection by total insulation
f) Not applicable.
7.4.5 Operating and maintenance gangways within ASSEMBLIES
Not applicable.
7.4.6 Requirements related to accessibility in service by authorised personnel
Not applicable.
7.5 Short-circuit protection and short-circuit withstand strength
7.5.1 General
The last paragraph is not applicable.
7.5.2 Information concerning short-circuit withstand strength
7.5.2.2 Not applicable.
7.5.2.3 Not applicable.
7.5.4 Co-ordination of short-circuit protective devices
7.5.4.1 Replace by:
The co-ordination of the protective devices shall be the subject of an agreement between the
manufacturer and the user before the contract is placed. The manufacturer's instructions may
take the place of such an agreement if no
...