08-30132181-DC.pdf
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1、a Date: 29 August 2008 Origin: National Latest date for receipt of comments: 31 OCTOBER 2008 Project no.: 2005/00951 Responsible committee: GEL/600 Earthing Interested committees: GEL/600/-/2 Title: Draft BS 951 Electrical earthing - Clamps for earthing and bonding - Specification Supersession infor
2、mation: If this document is published as a standard, the UK implementation of it will supersede BS951:1999 and partially supersede NONE. If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT B
3、E REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 OCTOBER 2008. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on comment
4、ing. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to dissemination by e-mail within such
5、an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email . British, International and foreign standards are also available from BSI Customer Services. Information on the co-operating organizations represented on
6、 the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/. Direct
7、tel: 020 8996 7721 Responsible Committee Secretary: Mr Ian Richardson (BSI) E-mail: Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 DPC: 08/30132181 DC Licensed CopyChinese University of Hong Kong, 2
8、1/10/2008 03:09, Uncontrolled Copy, (c) BSI b Introduction Your comments on this draft are invited and will assist in the preparation of the resulting British Standard. If no comments are received to the contrary, this draft may be implemented unchanged as a British Standard. Please note that this i
9、s a draft and not a typeset document. Editorial comments are welcomed, but you are advised not to comment on detailed matters of typography and layout. Submission of comments The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsib
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11、itish Standards of national origin and submit comments on them. You will also be able to see comments made on current draft standards by other interested parties. When submitting comments on a draft you will be asked to provide both a comment (i.e. justification for change) and a proposed change. Al
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13、o the BSI British Standards Draft Review system, or to a specific draft hosted on the system, may be distributed to other interested parties so that they may register and submit comments. It is not necessary to purchase a copy of the draft in order to review or comment on it; however, additional cop
14、ies of this draft may be purchased from BSI, Tel: +44(0) 20 8996 9001 or email: . Drafts and standards are also available in PDF format for immediate download from the BSI Shop http:/ Licensed CopyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT
15、AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 OCTOBER 2008. 1 Electrical earthing Clamps for earthing and bonding Specification Licensed CopyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST N
16、OT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 OCTOBER 2008. 2 Contents Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions 4 4 General 5 5 Construction 5 6 Material 7 7 Electrical characteristics 7 8 Non-slipping torque 8 9 Marking 8 Annexes Anne
17、x A (normative) Tests for electrical impedance and temperature rise 9 Annex B (normative) Short-time withstand current test 11 Annex C (normative) Torque test 13 Bibliography 15 List of figures Figure A.1 Test arrangement 10 Figure B.1 Test arrangement 12 Figure C.1 Apparatus for the torque test 13
18、List of tables Table 1 Termination reference and conductor size 6 Table 2 Maximum torques for screws 6 Table A.1 Test currents for temperature rise 10 Table B.1 Test currents for short-time withstand current (based on IEC 60364-5-54 Table A.54.2) 12 Table C.1 Non-slipping torque values 14 Licensed C
19、opyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 OCTOBER 2008. 3 Foreword This British Standard is published by BSI and came into effect on XX Month 20
20、0X. It was prepared by Technical Committee GEL/600. It supersedes BS 951:1999, which is withdrawn. Annex A, Annex B and Annex C are normative. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a
21、 British Standard cannot confer immunity from legal obligations. Licensed CopyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 OCTOBER 2008. 4 1 Scope Thi
22、s British Standard specifies performance and mechanical requirements for clamps used to provide mechanically and electrically sound means of earthing and/or bonding, which are primarily intended for use in electrical installations for the connection of: a) earthing conductors, having a cross-section
23、al area in the range 2.5 mm2 to 70mm2, to earth electrode rods or other means of earthing; b) bonding conductors to metal tubes of circular cross-section that have circumferences of not less than 18.8 mm (i.e. diameters of not less than 6 mm). NOTE 1 These clamps are also suitable for electrically b
24、onding other conductive parts, where at least one is a tube of circular cross-section. Such clamps are not intended for connection to the armour or sheath of a cable. NOTE 2 Clamps specified in this standard are intended to be used singly. NOTE 3 There is no correlation between the size of the condu
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