BS-7846-2000.pdf
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1、BRITISH STANDARD BS 7846:2000 Incorporating Amendments Nos. 1 and 2 Electric cables 600/1 000 V armoured fire-resistant cables having thermosetting insulation and low emission of smoke and corrosive gases when affected by fire ICS 29.060.20 ? Licensed Copy: London South Bank University, London South
2、 Bank University, Fri Dec 08 12:11:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7846:2000 This British Standard, having been prepared under the direction of the Electrotechnical Sector committee, was published under the authority of the Standards Committee and comes into effect on 15 October 200
3、0 BSI 29 April 2005 First published September 1996 Second edition October 2000 The following BSI references relate to the work on this British Standard: Committee reference GEL/20/2 Draft for comment 99/242286 DC ISBN 0 580 33224 1 Committees responsible for this British Standard The preparation of
4、this British Standard was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/2, Main cables, 1 kV and above, upon which the following bodies were represented: Association of Consulting Engineers British Approvals Service for Cables British Cables Association British Pla
5、stics Federation ERA Technology Ltd. Electricity Association London Underground Ltd. UK Steel Association Amendments issued since publication Amd. No.DateComments 1420425 February 2004See foreword 1565629 April 2005Certification text in foreword changed Licensed Copy: London South Bank University, L
6、ondon South Bank University, Fri Dec 08 12:11:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7846:2000 BSI 29 April 2005 i Contents Page Committees responsibleInside front cover Forewordiii 1Scope 1 2Normative references 2 3Terms and definitions 3 4Voltage designation 4 5Conductors 4 6Insulation 4
7、 7Identification of cores 4 8Laying-up 5 9Bedding 5 10Armour 6 11Oversheath 7 12Cable marking 7 13End sealing 8 14Schedule of tests 8 15Test conditions 10 16Routine tests 10 17Sample tests 10 18Type tests 11 Annex A (informative) Recommendations for the selection and operation of cables 16 Annex B (
8、informative) Recommendations for the installation of cables 17 Annex C (informative) Information to be provided with enquiry or order 18 Annex D (normative) Measurement of thickness 19 Annex E (normative) Abrasion test 20 Annex F (normative) Insulation resistance constant test on oversheath 21 Annex
9、 G (normative) Armour wire tests 21 Annex H (normative) Resistance of conductor and armour 23 Annex I Spare 23 Annex J (normative) Test for shrinkage of sheath on cable 24 Annex K (normative) Voltage test on completed cables 24 Annex L (normative) Fire resistance tests 25 Annex M (normative) Compati
10、bility test 41 Annex N (informative) Gross cross-sectional area of armour 41 Annex O Spare 42 Annex P (informative) Notes on type tests 42 Annex Q (informative) Guides to use 44 Bibliography 46 Figure E.1 Abrasion test 20 Figure L.1 Method of mounting a sample for test for resistance to fire with me
11、chanical shock 30 Figure L.2 Schematic diagram of test configuration 31 Figure L.3 Plan view of fire test equipment 32 Figure L.4 End elevation of fire test equipment (not to scale) 33 Figure L.5 Typical rubber bush for fastening to wall 34 Licensed Copy: London South Bank University, London South B
12、ank University, Fri Dec 08 12:11:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7846:2000 ii BSI 29 April 2005 Page Figure L.6 Burner face 34 Figure L.7 Schematic diagram of an example of a fuel control system 35 Figure L.8 Example of method of mounting a sample for test 36 Figure L.9 Detailed sec
13、tion of adjusted position of mounting of a sample for test 37 Figure L.10 Water drenching device 38 Figure L.11 Temperature measuring arrangement 39 Figure L.12 Basic circuit diagram 40 Table 1 Diameter of armour wire and mass of zinc coating 6 Table 2 Schedule of tests 9 Table 3 Compatibility requi
14、rements 11 Table 4 Two-core 600/1 000 V cables with stranded copper conductors 12 Table 5 Three-core 600/1 000 V cables with stranded copper conductors 13 Table 6 Four-core 600/1 000 V cables with stranded copper conductors 14 Table 7 Five-core 600/1 000 V cables with stranded copper conductors 14 T
15、able 8 600/1 000 V armoured auxiliary cables with stranded copper conductors 15 Table A.1 Selection of cables for a.c. systems 16 Table B.1 Minimum installation radius 17 Table B.2 Test voltages after installation 18 Table E.1 Vertical force on cable during abrasion test 20 Table G.1 Temperature cor
16、rection multiplication factors 22 Table H.1 Maximum resistance of conductor and armour for two-, three-, four- and five-core cables having steel wire armour 23 Table H.2 Maximum resistance of conductor and armour for auxiliary cables with copper conductors having steel wire armour 23 Table K.1 Test
17、voltage on completed cable 24 Table N.1 Gross cross-sectional area of armour wires for two-, three-, four- and five-core cables having steel wire armour 41 Table N.2 Gross cross-sectional area of armour wires for auxiliary cables with copper conductors having steel wire armour 42 Table P.1 Test sche
18、dule for the smoke emission test 43 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:11:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7846:2000 BSI 29 April 2005 iii Foreword This British Standard has been prepared by Technical Committee GEL/20/2. It consti
19、tutes a major revision of the 1996 edition which is withdrawn. The start and finish of text introduced by amendment No. 1 is indicated in the text by tags !“. Tags indicating changes to text carry the number of the amendment. For example, text altered by amendment No. 1 is indicated by !“. This new
20、edition, which makes changes to the scope so as to reflect those cable types in common use in the construction and industrial sector: introduces the new fire resistance categories F2 and F3, as described in the scope; introduces 5-core cables; extends 4-core cables up to 400 mm2; extends the auxilia
21、ry cables up to 48-core types; revises and updates the general technical content in line with BS 6724:1997, and aligns editorially with that publication where appropriate. The opportunity has also been taken to refer to BS EN 50268, BS EN 50267-2-1, BS EN 60811-1-3 and BS EN 50265-2-1 for details of
22、 methods and requirements for a smoke emission test, corrosive and acid gas emission, shrinkage of insulation, and flame propagation on a single cable, respectively. As with the previous edition, performance under fire conditions is assessed on the basis of tests which measure, under defined conditi
23、ons, the flame propagation, emission of smoke and corrosive gases, and fire resistance. Amendment No. 1:2004 implements the changes to the identification of cores by colours, in accordance with HD 308 S2. The principal identification colours are now: Single phase Green-and-yellow (Earth); blue (Neut
24、ral); brown (Live). Three phase Green-and-yellow (Earth); blue (Neutral); brown, black, grey (Live). Users should ensure that any interconnection between cables with these new colours and those with the pre-existing ones is carried out safely. BS 7671, as amended in parallel with this standard, give
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