Bsi bs en 60670 1 2005 + a1 2013

BRITISH STANDARD Boxes and enclosures for electrical accessories for household and similar fixed electrical installations — Part 1: General requirements ICS 29.120.10 BS EN 60670-1:2005 +A1:2013 Incorporating corrigenda November 2007 and March 2010 BS EN 60670-1:2005+A1:2013 National foreword This British Standard is the UK implementation of EN 60670-1:2005+A1:2013, incorporating corrigenda November 2007 and March 2010 It is derived from IEC 60670-1:2002, incorporating corrigendum February 2003 and amendment 1:2011 It supersedes BS EN 60670-1:2005, which will be withdrawn on 31 December 2017 The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to IEC text carry the number of the IEC amendment For example, text altered by IEC amendment is indicated by !" The CENELEC common modifications have been implemented at the appropriate places in the text The start and finish of each common modification is indicated in the text by tags }~ Where a common modification has been introduced by amendment, the tags carry the number of the amendment For example, the common modifications introduced by CENELEC amendment A1 are indicated by PQ National Annex NA (informative) reproduces CENELEC Interpretation Sheet 1, June 2009 The UK participation in its preparation was entrusted to Technical Committee PEL/23, Electrical accessories A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 October 2005 © The British Standards Institution 2013 Published by BSI Standards Limited 2013 ISBN 978 580 63319 Amendments/corrigenda issued since publication Date Comments 29 February 2008 Implementation of CENELEC corrigendum November 2007 [changes to EN Foreword and Annex ZC] 30 April 2010 Implementation of CENELEC corrigendum March 2010; Annex ZB, Clause 12.9 amended 31 July 2011 Addition of National Annex NA, reproducing CENELEC Interpretation Sheet 31 October 2013 Implementation of IEC amendment 1:2011 with CENELEC modifications Annexes ZA and ZB updated EN 60670-1:2005+A1 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM April 2013 ICS 29.120.10 English version Boxes and enclosures for electrical accessories for household and similar fixed electrical installations Part 1: General requirements (IEC 60670-1:2002 + corrigendum 2003, modified) Btes et enveloppes pour appareillage électrique pour installations électriques fixes pour usages domestiques et analogues Partie 1: Règles générales (CEI 60670-1:2002 + corrigendum 2003, modifiée) Dosen und Gehäuse für Installationsgeräte für Haushalt und ähnliche ortsfeste elektrische Installationen Teil 1: Allgemeine Anforderungen (IEC 60670-1:2002 + Corrigendum 2003, modifiziert) This European Standard was approved by CENELEC on 2004-09-22 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels © 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 60670-1:2005 E BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) –2– Foreword The text of the International Standard IEC 60670-1:2002, prepared by SC 23B, Plugs, socket-outlets and switches, of IEC TC 23, Electrical accessories, together with the common modifications prepared by the Technical Committee CENELEC TC 23B, Switches for household and similar fixed electrical installations, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 60670-1 on 2004-09-22 The following dates were fixed: - - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2005-10-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-07-01 In this standard, the following print types are used: - requirements proper: in roman type; - test specifications: in italic type; - notes: in smaller roman type Figures and annexes which are additional to those in IEC 60670-1 are prefixed “Z” Endorsement notice The text of the International Standard IEC 60670-1:2002 + corrigendum February 2003 was approved by CENELEC as a European Standard with agreed common modifications Foreword to amendment A1 This document (EN 60670-1:2005/A1:2013) consists of the text of IEC 60670-1:2002/A1:2011 prepared by IEC/SC 23B "Plugs, socket-outlets and switches" of IEC/TC 23 "Electrical accessories", together with the common modifications prepared by CLC/TC 23BX "Switches, boxes and enclosures for household and similar purposes, plugs and socket outlets for d.c and for the charging of electrical vehicles including their connectors" The following dates are fixed: • latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-12-31 • latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2017-12-31 Annexes which are additional to those in IEC 60670-1:2002/A1:2011 are prefixed “Z” Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC) Endorsement notice The text of the International Standard IEC 60670-1:2002/A1:2011 was approved by CENELEC as a European Standard with agreed common modifications –3– BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) CONTENTS Scope Normative references .5 Definitions General requirements .8 General notes on tests Ratings Classification Marking 10 Dimensions 11 10 Protection against electric shock 11 11 Provision for earthing 12 12 Construction 13 Resistance to ageing, protection against ingress of solid objects and against harmful ingress of water .2 14 Insulation resistance and electric strength .28 15 Mechanical strength .29 16 Resistance to heat 33 17 Creepage distances, clearances and distances through sealing compound 3 18 Resistance of insulating material to abnormal heat and fire 19 Resistance to tracking 35 20 Resistance to corrosion 35 21 Electromagnetic compatibility (EMC) .3 Annex A (informative) Examples of enclosures and parts thereof 54 Annex ZA (normative) Normative references to international publications with their corresponding European publications 56 Annex ZB (normative) Special national conditions Annex ZC (informative) A-deviations Bibliography 55 National Annex NA (informative) CENELEC Interpretation Sheet 59 Figure – Examples of membranes and grommets 36 Figure – Void 36 Figure – Void 36 Figure – Void 36 ! Figure – Test wall (see 13.3.2)" 37 Figure – Reference surfaces for boxes and enclosures 38 ! Figure – Mounting block for flush type boxes and enclosures in order to apply blows on the rear surface ( see 15.3) " 39 Figure – Apparatus for impact test at low temperature (see 15.1) 40 ! Figure – Height of fall for blows for part A ( see 15.3)" 41 Figure 10 – Sequence of blows for parts A, B, C, D, E, F and G (see 15.3) 42 Figure 11 – Apparatus for testing the cable anchorage (see 12.6) 43 Figure 12 – Arrangement for test on covers or cover-plates (see 12.1.2.2) 44 BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) –4– Figure 13 – Gauge (thickness about mm) for the verification of the outline of lids, covers or cover-plates (see 12.1.2.3) 44 Figure 14 – Examples of application of the gauge of Figure 13 on covers fixed without screws on a mounting surface or supporting surface (see 12.1.2.3) 45 Figure 15 – Examples of application of the gauge of Figure 13 (see 12.1.2.3) 46 Figure 16 – Gauge for verification of grooves, holes and reverse tapers (see 12.1.2.4) 47 Figure 17 – Sketch showing the direction of application of the gauge of Figure 16 (see 12.1.2.4) 47 Figure 18 – Verification of fixing means for boxes and enclosures classified according to 7.2.1.3 (see 12.11) 48 Figure 19 – Void 48 Figure 20 – Void 48 Figure 21 – Diagrammatic representation of the glow-wire test (see Clause 18) 49 Figure 22 – Example of mounting block for boxes to be embedded in masonry (flush type and semi-flush type) according to 12.10 50 Figure 23 – Example of the fixing of the auxiliary device mounted on a specimen according to 12.10 51 Figure 24 – Example of test apparatus for the test according to 12.10 52 Figure 25 – Example of the protected volume (see 13.3.4) 53 Figure 26 – Demonstration of the non-penetration of the internal volume (see Clause 10) 53 Figure A.1 – Examples of enclosures and parts of thereof 54 Table – Classification of boxes and enclosures Table – Forces to be applied to covers, cover-plates or actuating members whose fixing is not dependent on screws Table – Forces and torques to be applied to cable anchorages 17 Table – Tightening torques for the verification of the mechanical strength of screws 20 Table – Torque test values for cable glands 22 Table – Test voltage for electric strength test 29 Table – Determination of parts A, B, C, D E, F and G 31 Table – Height of fall for impact test 32 –5– BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) BOXES AND ENCLOSURES FOR ELECTRICAL ACCESSORIES FOR HOUSEHOLD AND SIMILAR FIXED ELECTRICAL INSTALLATIONS – Part 1: General requirements Scope This part of IEC 60670 applies to boxes, enclosures and parts of enclosures (hereafter called “boxes” and “enclosures”) for electrical accessories with a rated voltage not exceeding 000 V a.c and 500 V d.c intended for household or similar fixed electrical installations, either indoors or outdoors NOTE Requirements for particular types of boxes and enclosures are given in the relevant parts of IEC 60670 Boxes and enclosures complying with this standard are suitable for use at ambient temperature not normally exceeding 25 °C but occasionally reaching 35 °C This International Standard is intended to apply to boxes and enclosures for electrical accessories within the scope of IEC technical committee 23 NOTE This standard may also be used as a reference document for other IEC technical committees and subcommittees A box or an enclosure which is an integral part of an electrical accessory and provides protection for that accessory against external influences (for example mechanical impact, ingress of solid objects or water, etc.) is covered by the relevant standard for such an accessory This standard does not apply to – ceiling roses; – luminaire supporting couplers; – boxes, enclosures and parts of enclosures specifically designed to be used for cable trunking and ducting systems complying with IEC 61084 and which are not intended to be installed outside of these systems Normative references The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies IEC 60068-2-75:1997, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests IEC 60112:1979, Method for determining the comparative and the proof-tracking indices of solid insulating materials under moist conditions IEC 60423:1993, Conduits for electrical purposes – Outside diameters of conduits for electrical installations and threads for conduits and fittings IEC 60529:1989, Degrees of protection provided by enclosures (IP Code) BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) –6– IEC 60695-2-11:2000, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods Glow-wire flammability test method for end-products IEC 60695-10-2:1995, Fire hazard testing – Part 10-2: Guidance and test methods for the minimization of the effects of abnormal heat on electrotechnical products involved in fires – Method for testing products made from non-metallic materials for resistance to heat using the ball pressure test Text deleted IEC 61032:1997, Protection of persons and equipment by enclosures – Probes for verification IEC 61084 (all parts), Cable trunking and ducting systems for electrical installations IEC 61140:2001, Protection against electric shock – Common aspects for installation and equipment !IEC 62444:2010, Cable glands for electrical installations" Definitions For the purposes of this part of IEC 60670, the following definitions apply 3.1 enclosure combination of parts, such as boxes, covers, cover-plates, lids, box extensions, accessories, etc., providing after assembly and installation as in normal use, an appropriate protection against external influences, and a defined protection against contact with enclosed live parts from any accessible direction (see Annex A) 3.2 box part of an enclosure provided with means for fixing a cover, cover-plate, accessory, etc., and intended to receive accessories (such as socket-outlets, switches, etc.) 3.3 box extension part of an enclosure which is intended to extend a box for the purpose of either increasing the internal volume of the box or enclosure or to adjust for mounting the box flush or semi-flush with the finished surface of a wall or the like 3.4 lid, cover or cover-plate part of an enclosure, not integral with or part of an accessory, which may either retain an accessory in position or enclose it 3.5 raised cover cover intended for mounting directly onto a box to provide for the attachment of accessories and to increase the internal volume of the enclosure NOTE The centre portion of the cover is raised to accommodate a specific wall or ceiling thickness and to permit the mounting of the accessory on it, flush with the surface of the wall or ceiling –7– BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) 3.6 exposed conductive part conductive part of electrical equipment, which can be touched and which is not normally live, but which can become live when basic insulation fails 3.7 surface mounting box or enclosure box or enclosure which is intended for mounting on a surface (see Annex A) 3.8 flush-mounting box or enclosure box or enclosure which is intended for mounting flush with the surface (see Annex A) 3.9 semi-flush mounting box or enclosure box or enclosure which is intended to fit within a mounting surface and partially projects from the mounting surface 3.10 cable gland !a device designed to permit the entry of a cable, flexible cable or insulated conductor into an enclosure, and which provides sealing and retention It may also provide other functions such as earthing, bonding, insulation, cable guarding, strain relief or a combination of these" 3.11 seal (packing) material used to fill up the space between the inside of a gland and the cable passing through, usually compressed by the gland and thereby forming a joint 3.12 gasket material introduced between mating surfaces of an enclosure which in compression forms a joint 3.13 grommet component used to support and protect the cable or conduit at the point of entry It may also prevent the ingress of moisture or contaminants (see Figure 1) 3.14 entry membrane component or an integral part of an enclosure used to protect the cable which may be used to support the cable or conduit at the point of entry NOTE An entry membrane may also prevent the ingress of moisture or contaminants and may be part of a grommet (see Figure 1) 3.15 protecting membrane component or an integral part of an enclosure that is not intended to be penetrated in normal use and is intended to provide protection against ingress of water or solid objects and/or to allow the operation of an accessory (see Figure 1) 3.16 composite material combination of metal and insulating material BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) –8– 3.17 spout (hub) open entry of a box permitting the insertion and containment of a conduit 3.18 cable retention ability to limit the displacement of a fitted cable against pull forces 3.19 cable anchorage ability to limit the displacement of a fitted flexible cable against pull and push forces and torques !3.20 blanking-plug a blanking-plug is a component used to close an open inlet or an open knock out" General requirements Each part of the enclosure shall be so designed and constructed that, when mounted and installed as for normal use, the enclosure ensures adequate electrical and mechanical protection to the parts so enclosed and minimizes the risk of danger to the user or surroundings Compliance is checked by carrying out the relevant tests specified 5.1 General notes on tests Tests according to this standard are type tests Unless otherwise specified boxes and enclosures are tested as delivered Accessories complying with other standards are not tested Tests on boxes and enclosures of insulating material shall be performed after a preconditioning of at least 10 days at ambient temperature and relative air humidity of between 45 % and 85 % Unless otherwise specified the tests shall be carried out in the order of the clauses at an ambient temperature of (20 r 5) °C on a set of three new specimens 5.2 If one of the specimens does not satisfy a test due to an assembly or a manufacturing fault, that test and any preceding ones which may have influenced the results of the test shall be repeated and also the tests which follow shall be made in the required sequence on another full set of specimens, all of which shall comply with the requirements NOTE When submitting the first set of specimens, the applicant may also submit the additional set of specimens which may be necessary, should one specimen fail The testing station will then, without further request, test the additional set of specimens and will only reject if a further failure occurs If the additional set of specimens is not submitted at the same time, the failure of one specimen will entail rejection Ratings See relevant parts of this standard BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) – 48 – F3 a a F2 F1 18a 18b 18c IEC 2797/02 Key Test specimen Sheet of plywood Lever Main axis of the box Figure 18 – Verification of fixing means for boxes and enclosures classified according to 7.2.1.3 (see 12.11) Figure 19 – Void Figure 20 – Void – 49 – BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) ‡15 ‡8 ‡15 ‡8 IEC 2800/02 Key Dimensions in millimetres Specimen To be tested No test is required Figure 21 – Diagrammatic representation of the glow-wire test (see Clause 18) BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) – 50 – P Key 1) 2) specimen plaster 3) block of wood (*) The gap between the main external profile of the box and the internal profile of the receptacle shall be at least 20 mm, and for parts which project from the main profile never less than 10 mm Figure 22 – Example of mounting block for boxes to be embedded in masonry (flush type and semi-flush type) according to 12.10 Q – 51 – BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) P Key 1) auxiliary device 2) specimen Figure 23 – Example of the fixing of the auxiliary device mounted on a specimen according to 12.10 Q BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) – 52 – P 45° Key 1) supplementary weight (SW) 2) principal weight (PW) 3) carrier (C) 4) mounting plate (A) Figure 24 – Example of test apparatus for the test according to 12.10 Q – 53 – ! BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) D H L IEC 460/11 Key 1) Cover 2) Absorbent paper 3) Box 4) Protected volume NOTE The base is always the bottom of the protected area when installed PFigure 25 – Example of the protected volume (see 13.3.4)Q ∅12 IEC 461/11 PFigure 26 – Demonstration of the non-penetration of the internal volume (see Clause 10)Q " BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) – 54 – Annex A (informative) Examples of enclosures and parts thereof 5 a b1 b2 IEC 2801/02 Key Box Cover-plate Cover Pattern Accessory a Pattern + cover (only surface-type) b1 Box + cover-plate (surface-type) b2 Box + cover-plate (flush-type) Figure A.1 – Examples of enclosures and parts of thereof – 55 – BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) Bibliography IEC 60670 (all parts), Boxes and enclosures for electrical accessories for household and similar fixed electrical installations ISO 1456:1988, Metallic coatings – Electrodeposited coatings of nickel plus chromium and of copper plus nickel plus chromium ISO 2081:1986, Metallic coatings – Electroplated coatings of zinc on iron or steel ISO 2093:1986, Electroplated coatings of tin – Specification and test methods _ BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) – 56 – Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies NOTE Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies Publication Year Title EN/HD Year IEC 60068-2-75 1997 Environmental testing Part 2-75: Tests - Test Eh: Hammer tests EN 60068-2-75 1997 IEC 60112 1979 Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions HD 214 S2 1980 IEC 60423 (mod) 1993 Conduits for electrical purposes - Outside diameters of conduits for electrical installations and threads for conduits and fittings EN 60423 1994 IEC 60529 1989 Degrees of protection provided by enclosures (IP Code) EN 60529 + corr May 1991 1993 IEC 60695-2-11 2000 Fire hazard testing Part 2-11: Glowing/hot-wire based test methods - Glowwire flammability test method for end-products EN 60695-2-11 2001 IEC 60695-10-2 1995 Part 10-2: Guidance and test methods for the minimization of the effects of abnormal heat on electrotechnical products involved in fires - Method for testing products made from non-metallic materials for resistance to heat using the ball pressure test - - IEC 61032 1997 Protection of persons and equipment by enclosures Probes for verification EN 61032 1998 IEC 61084 Series Cable trunking and ducting systems for electrical installations - - IEC 61140 2001 Protection against electric shock - Common aspects for installation and equipment EN 61140 2002 IEC 62444 2010 Cable glands for electrical installations - - 2) 1) 2) HD 214 S2 is superseded by EN 60112:2003, which is based on IEC 60112:2003 IEC 60695-10-2:2003 was endorsed as EN 60695-10-2:2003 1) – 57 – BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) Annex ZB (normative) Special national conditions Special national condition: National characteristic or practice that cannot be changed even over a long period, e.g climatic conditions, electrical earthing conditions NOTE If it affects harmonization, it forms part of the European Standard / Harmonization Document For the countries in which the relevant special national conditions apply these provisions are normative, for other countries they are informative Clause Special national condition 8.1 United Kingdom Add after (e): The marking of the type reference is not used Spain Boxes shall comply with the standard sheets specified in the Spanish Standard UNE 20451 Screws are included in some of these standard sheets because screws are considered as a dimensional requirement 11.1 Denmark Due to the lack of an earthing conductor in many existing old buildings, boxes and enclosures requiring earth connection cannot normally be used 12.5 Czech Republic, Netherlands, United Kingdom Inlets according to 7.3.3 in boxes intended to receive switches or socket-outlets shall have spout(s) with adequate inlet stops 12.7 Germany A cable retention is required for boxes and enclosures for hollow walls due to installation practices 12.7 Denmark A cable retention is required for boxes and enclosures for hollow walls due to installation practices 12.9 Czech Republic, Netherlands Flush-type boxes shall have metal inserts and be provided with metal screws having ISO metric thread United Kingdom With the exception of products within the scope of EN 60670-22 or EN 60670-23, boxes shall be provided with metal threads so as to ensure safety and thread-forming or thread-cutting screws shall not be used 13.2 Germany A minimum protection degree of IP30 is required for boxes and enclosures for hollow walls due to installation practices 13.2 Norway A minimum protection degree of IP30 is required for boxes and enclosures for hollow walls due to installation practices 13.2 Denmark A minimum protection degree of IP30 is required for boxes and enclosures for hollow walls due to installation practices BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) – 58 – Annex ZC (informative) A-deviations A-deviation: National deviation due to regulations, the alteration of which is for the time being outside the competence of the CENELEC national member This European Standard falls under Directive 73/23/EEC NOTE (from CEN/CENELEC IR Part 2:2002 , 2.17) Where standards fall under EC Directives, it is the view of the Commission of the European Communities (OJ No C 59, 1982-03-09) that the effect of the decision of the Court of Justice in case 815/79 Cremonini/Vrankovich (European Court Reports 1980, p 3583) is that compliance with A-deviations is no longer mandatory and that the free movement of products complying with such a standard should not be restricted except under the safeguard procedure provided for in the relevant Directive A-deviations in an EFTA-country are valid instead of the relevant provisions of the European Standard in that country until they have been removed Clause Deviation Malta (Electrical Accessories Regulations, 2004) United Kingdom (UK Plug and Socket Safety Regulations, 1994) Boxes intended to accommodate socket-outlets or connection units to BS 1363 shall have provision for two M3.5 fixing screws at the following fixing centres, in accordance with BS 4662: – at centres of 60,3 mm ± 0,2 mm on the horizontal or vertical centrelines for boxes intended to accommodate 1-gang socket-outlets or connection units – at centres of 120,6 mm ± 0,3 mm on the horizontal or vertical centrelines for boxes intended to accommodate 2-gang socket-outlets or connection units – at centres of 180,9 mm ± 0,4 mm on the horizontal or vertical centrelines for boxes intended to accommodate 3-gang socket-outlets or connection units – 59 – BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) National Annex NA (informative) CENELEC Interpretation Sheet This National Annex NA reproduces CENELEC Interpretation Sheet (June 2009) BS EN 60670-1:2005+A1:2013 EN 60670-1:2005+A1:2013 (E) – 60 – EN 60670-1/IS1 Interpretation Sheet EN 60670-1:2005 English version _ Foreword This Interpretation Sheet to the European Standard EN 60670-1:2005 was prepared by the Interpretation Panel of the Technical Committee CENELEC TC 23BX, D.C plugs and socket-outlets and switches for household and similar fixed electrical installations The text of the draft was submitted to the Unique Acceptance Procedure (as prISA) and was approved by CENELEC on 2009-04-17 Subclause 12.1.3 Question The method and the number of tests to be performed are considered not clear Indeed, Subclause 12.1.2 is mainly composed of two tests: – 12.1.2.1 Verification of the non-removal of the lids, covers or cover-plates; – 12.1.2.2 Verification of the removal of the lids, covers or cover-plates OSM-IN sent a proposal to perform only a non-removal test taken from 12.1.2.1 (force of 120 N gradually applied in a direction perpendicular to the mounting surfaces, in such a way that the resulting force acting on the centre of the lids, covers or cover-plates, or parts of them) Interpretation 12.1.3 Replace the words "shall not come off" by "need not come off" _ June 2009 blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us 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