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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 6231:1998 Incorporatin
2、g Amendment No. 1 ICS 29.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for PVC-insulated cables for switchgear and controlgear wiring Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British
3、Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1998 BSI 17 June 2005 First published, as BS 1231, July 1945 Second edition, November 1958 Third edition, February 1963
4、 Fourth edition, as BS 6231, August 1969 Fifth edition, May 1978 Sixth edition, December 1981 Seventh edition, October 1990 Eighth edition, August 1998 The following BSI references relate to the work on this standard: Committee reference GEL/20/1 Draft for comment 96/215021 DC ISBN 0 580 29572 9 BS
5、6231:1998 Amendments issued since publication Amd. No. 15648 17 June 2005 Certification notice in Foreword changed and deleted on inside back cover Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee GEL/20
6、, Electric cables, to Subcommittee GEL/20/1, Wiring cables, upon which the following bodies were represented: Association of Consulting Engineers Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd) British Approvals Service for Cables British Cable Makers Confed
7、eration British Plastics Federation British Retail Consortium Chartered Institution of Building Services Engineers Department of Trade and Industry Consumer Safety Unit, C A Division Electricity Association ERA Technology Ltd. Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.)
8、Engineering Industries Association Institution of Incorporated Executive Engineers Lift and Escalator Industries Association London Underground Ltd. Portable Electric Tool Manufacturers Association Transmission and Distribution Association (BEAMA Ltd.) Licensed Copy: sheffieldun sheffieldun, na, Tue
9、 Dec 05 07:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6231:1998 BSI 17 June 2005 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Temperature ratings 1 5 Voltage designations 1 6 Identification 2 7 Marking 2 8 Conduct
10、ors 2 9 Insulation 3 10 Construction and overall dimensions 3 11 Dimensional test methods 3 12 Electrical requirements and test methods 3 13 Durability of colours and marking 5 14 Test under fire conditions 5 Annex A (informative) Guidance on installation and operating temperatures 12 Bibliography I
11、nside back cover Table 1 Constructional details and maximum resistance for small circular tinned annealed copper conductors not included in BS 6360 2 Table 2 Spare 4 Table 3 Voltage values for voltage test 4 Table 4 Thermal endurance test voltage 5 Table 5 Types AU and AK PVC-insulated cables 6 Tabl
12、e 6 Types BU and BR PVC-insulated rigid cables 7 Table 7 Type BK PVC-insulated flexible cables 8 Table 8 Types CU and CR PVC-insulated rigid cables 9 Table 9 Type CK PVC-insulated flexible cables 10 Table 10 List of tests applicable to the various types of cable 11 Licensed Copy: sheffieldun sheffie
13、ldun, na, Tue Dec 05 07:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BS 6231:1998 Foreword This new edition of BS 6231 has been prepared by Technical Subcommittee GEL/20/1 and supersedes BS 6231:1990 which is withdrawn. It introduces technical changes but does not reflect a full review or rev
14、ision of this standard, which will be undertaken in due course. As specified in the previous edition, this standard adopts the voltage designation for some types of harmonized single-core PVC-insulated cables in CENELEC Harmonization Document HD 21. Although CENELEC has now agreed to a 600/1 000 V r
15、ating for some cables of the types specified in BS 6004 when installed inside equipment in protected conditions, the electrical controlgear industry has requested continuation and revision of BS 6231, rather than its withdrawal, because some requirements cannot always be fulfilled by the use of cabl
16、es conforming to other British Standards. To meet the requirements of the electrical switchgear and controlgear industry, a new range of cables, types CR, CU and CK, has been introduced for operation at a designated temperature of 85 8C. These cables are dimensionally similar to the existing types B
17、R, BU and BK. The opportunity has also been taken to align types AU and AK cables contained in this standard with those of BS 4808-2. Annex A (informative) gives guidance on installation and operating temperatures. Cables conforming to this standard are deemed also to conform, for corresponding size
18、s, to the requirements of the corresponding classes of BS 4808, BS 6004 and BS 6500. Because of the more stringent requirements of this standard, the converse is not necessarily true. Product certification/inspection/testing. Users of this British Standard are advised to consider the desirability of
19、 third-party certification/inspection/testing of product conformity with this British Standard. Users seeking assistance in identifying appropriate conformity assessment bodies or schemes may ask BSI to forward their enquiries to the relevant association. A British Standard does not purport to inclu
20、de all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, page i
21、 and ii, pages 1 to 12 and a back cover. BSI 17 June 2005 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 BS 6231:1998 1 Scope This British Standard specifies requirements for single-core non-sheathed cables, including flexible cables, use
22、d for the wiring of switch, control, metering, relay and instrument panels of power switchgear, and for such purposes as internal connections in rectifier equipment and in motor starters and controllers. The types of cable specified in this standard are as follows: Type Form of conductor Designated
23、temperature Rated voltage AU Rigid, round, solid 70 8C 60 V AK Flexible 70 8C 60 V BR Rigid, round, stranded 70 8C 600/1 000 V BU Rigid, round, solid 70 8C 600/1 000 V BK Flexible 70 8C 600/1 000 V CR Rigid, round, stranded 90 8C 600/1 000 V CU Rigid, round, solid 90 8C 600/1 000 V CK Flexible 90 8C
24、 600/1 000 V 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. For undated referen
25、ces, the latest edition of the publication referred to applies. BS 2011:1981, Environmental testing Part 2.1T: Test T Soldering. BS 4066-1, Tests on electric cables under fire conditions Part 1: Method of test on a single vertical insulated wire or cable. BS 4066-2, Tests on electric cables under fi
26、re conditions Part 2: Method of test on a single small insulated wire or cable. BS 4727, Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms Part 2: Terms particular to power engineering Group 08 Electric cables. BS 5099, Spark testing of electric cables. B
27、S 6360, Specification for conductors in insulated cables and cords. BS 7655-3.1, Specification for insulating and sheathing materials for cables Part 3: PVC insulating compounds Section 3.1: Harmonized types. BS 7655-3.2, Specification for insulating and sheathing materials for cables Part 3: PVC in
28、sulating compounds Section 3.2: Hard grade types. BS EN 60811-1-1:1995, Insulating and sheathing materials for electric cables. Common test methods Part 1-1: General application Measurement of thickness and overall dimensions. Tests for determining the mechanical properties. PD 2379, Register of col
29、ours of manufacturers identification threads for electric cables and cords . 3 Definitions For the purposes of this British Standard the definitions relating to electric cables given in BS 4727 apply. 4 Temperature ratings The designated temperatures quoted are the temperatures assigned to the same
30、materials in BS 6004, BS 6500 and BS 7655. The combination of ambient temperature and temperature rise due to load should not result in a conductor temperature exceeding the designated temperature. NOTE Attention is drawn to annex A which gives guidance on installation and operating temperatures. 5
31、Voltage designations 5.1 Types AU and AK cables shall be designated by the rated voltage, which is 60 V. They are intended for use where the operating voltage to earth does not exceed 60 V. They are suitable for wiring circuits which are tested with d.c. at a voltage not exceeding 500 V. NOTE Where
32、the fault power is low and adequate mechanical protection is provided, these types may be used at voltages higher than 60 V by agreement between the purchaser and the manufacturer. 5.2 Types BU, BR, BK, CU, CR and CK cables shall be designated by the rated voltages U0 and U expressed in the form U0/
33、U, where U0 is the power-frequency voltage to earth for which the cable is designed, and U is the power-frequency voltage between phase conductors for which the cable is designed. The rated voltage for these cables is 600/1 000 V. These cables are intended for use at alternating voltages not exceedi
34、ng 600 V to earth, and direct voltages not exceeding 1 000 V to earth. They are suitable for wiring circuits for which the prescribed alternating test voltage, when installed in the equipment, does not exceed 4 kV r.m.s. for 1 min. BSI 17 June 2005 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec
35、 05 07:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 BS 6231:1998 6 Identification 6.1 All cables shall be identified by colour as listed in Tables 5, 6, 7, 8 and 9. The colour shall be either throughout the whole of the insulation or on its surface. 6.2 For types AU and AK cables, the colours
36、of bi-colour combinations shall be uniform and the form shall be either continuous helical marking or ring marking which, when viewed from any side, shall be readily identifiable within every 15 mm of length. 6.3 On types BU, BR, BK, CU, CR and CK cables marked with the bi-colour combination green/y
37、ellow, the distribution of these colours shall conform to the following condition. On the core marked with the bi-colour combination green/yellow, the distribution of the colours shall be such that for every 15 mm length of core, one of these colours shall cover at least 30 % and at most 70 % of the
38、 surface of the core, while the other colour covers the remainder of the surface. NOTE 1 In cases of dispute and where appropriate to the method of colour marking of the insulation, a suitable test for checking conformity is given in BS 6469-99.1:1992, clause 8. NOTE 2 Information on the use of the
39、colours green/yellow. It is understood that the colours green and yellow when they are combined as specified above are recognized exclusively as a means of identification of the core intended for use as earth connection or similar protection. 6.4 The colours of the cables shall be durable and easily
40、 discernible. Conformity shall be checked by the test described in clause 13. 7 Marking (not applicable to types AU and AK) 7.1 Types BU, BR, BK, CU, CR and CK cables shall be provided with an indication of origin consisting of either an identification thread or the continuous marking of the manufac
41、turers name or trade mark. This marking may be by printing, indenting or embossing. 7.2 If coloured threads are used, the colours shall be in accordance with those registered in PD 2379. The colours of identification threads shall be easy to recognize or shall become recognizable by cleaning with pe
42、trol or any other suitable solvent, if necessary. 7.3 The designated temperature shall be indicated on types CU, CR and CK cables in the following form: HEAT RESISTING 90 The marking shall be by printing, indenting or embossing, and shall be legible and easily discernible. NOTE This marking may be c
43、ombined with the marking specified in 7.1. 7.4 Each specified mark shall be regarded as continuous if the distance between the end of the mark and the beginning of the next identical mark does not exceed 275 mm. 7.5 Any marking by printing shall be durable. Conformity shall be checked by the test pr
44、escribed in clause 13. 8 Conductors 8.1 The conductors shall be circular, plain or tinned, annealed copper conductors as specified in 8.2 to 8.6. 8.2 For type AU cables, the conductors shall be tinned annealed copper conductors. The number and nominal diameter of wires and the maximum resistance at
45、20 8C shall conform to the appropriate requirements given in Table 1. 8.3 For type AK cables, the conductors shall be tinned annealed copper conductors. They shall conform to the appropriate requirements of BS 6360 for class 5 conductors. 8.4 For types BK and CK cables, the conductors shall be eithe
46、r plain annealed or tinned annealed copper conductors. They shall conform to the appropriate requirements of BS 6360 for class 5 conductors. 8.5 The conductors of types AU and AK cables, and of types BK and CK when tinned annealed copper conductors are used, shall conform to the requirements for sol
47、derability when tested in accordance with Test Ta, Method 1 : Solder bath at 235 8C, given in BS 2011-2.1T:1981. 8.6 For all other types of cable the conductors shall be plain annealed copper conforming to the appropriate requirements of BS 6360 for class 1 or class 2 conductors. Table 1 Constructio
48、nal details and maximum resistance for small circular tinned annealed copper conductors not included in BS 6360 Nominal cross-sectional area Number and nominal diameter of wires Maximum resistance of conductor at 20 8C mm2 mm V/km 0.2 1/0.50 92.2 0.28 1/0.60 64.1 0.5 1/0.80 36.0 BSI 17 June 2005 Lic
49、ensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 BS 6231:1998 9 Insulation 9.1 The insulation shall be PVC compound of the following types as designated in BS 7655 and shall conform to the appropriate requirements of that standard, as follows: Types AU and AK cables: PVC type 2 or type TI 1 conforming to BS 7655-3.2 or -3.1 respectively, as specified in Table 5. Types BU, BR and BK cables: PVC type TI 1 conforming to BS 7655-3.1. Types CU, CR and CK cables, PVC type TI 3
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