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1、BRITISH STANDARD BS 7879:1997 Sectional specification for Equipment cables to be used for digital and analogue communication (Implementation of CENELEC HD 609 S1:1995) ICS 33.040.50 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:39:20 GMT+00:00 2006, Uncontr
2、olled Copy, (c) BSI BS 7879:1997 This British 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 January 1997 BSI 11-1998 The following BSI references relate to the work on this
3、 standard: Committee reference EPL/46/1 Draft announced in BSI Update September 1996 ISBN 0 580 26371 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee EPL/46, Cables, wires and waveguides, RF connectors and accessories f
4、or cabling and signalling, to Subcommittee EPL/46/1, Communication cables, on which the following bodies were represented: AEA Technology British Approvals Service for Cables British Broadcasting Corporation British Cable Makers Confederation British Telecommunications plc ERA Technology Federation
5、of the Electronics Industry London Underground Nation Supervising Inspectorate (BSI PC) Society of Cable Telecommunication Engineers Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:39:20 GMT+00:00 2006,
6、 Uncontrolled Copy, (c) BSI BS 7879:1997 BSI 11-1998i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of HD 609 S13 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:39:20 GMT+00:00 2
7、006, Uncontrolled Copy, (c) BSI BS 7879:1997 ii BSI 11-1998 National foreword This British Standard has been prepared by Subcommittee EPL/46/1 and is the English language version of HD 609 S1:1995 Sectional specification for equipment cables to be used for digital and analogue communication, publish
8、ed by the European Committee for Electrotechnical Standardization (CENELEC). A British Standard does not purport to include 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 conf
9、er immunity from legal obligations. Cross-references Publication referred toCorresponding British Standard HD 602 S1:1992BS 6425 Test on gases evolved during the combustion of materials from cables Part 2:1993 Determination of degree of acidity (corrosivity) of gases by measuring pH and conductivity
10、 HD 608 S1:1992BS 7630:1993 Generic specification for symmetric pair/quad and multicore cables for digital communication BS 7878 Materials used in communication cables HD 624.1 S1:1994Part 1:1996 PVC insulation compounds HD 624.2 S1:1994Part 2:1996 PVC sheathing compounds HD 624.3 S1:1994Part 3:1996
11、 PE insulation HD 624.5 S1:1995Part 5:1996 Polypropylene insulation compounds HD 624.6 S1:1995Part 6:1996 Halogen free flame retardant insulation compounds HD 624.7 S1:1994Part 7:1996 Halogen free flame retardant thermoplastic sheathing compounds Summary of pages This document comprises a front cove
12、r, an inside front cover, pages i and ii, the HD title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: Lond
13、on South Bank University, London South Bank University, Fri Dec 08 12:39:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI HARMONIZATION DOCUMENT DOCUMENT DHARMONISATION HARMONISIERUNGSDOKUMENT HD 609 S1 November 1995 ICS 33.040.50 Descriptors: Equipment cables, digital communications English version Se
14、ctional specification for equipment cables to be used for digital and analogue communication Spcification intermdiaire pour cbles dquipment destins la communication numrique et analogue Rahmenspezifikation fr Gerteanschlukabel fr digitale und analoge Kommunikation This Harmonization Document was app
15、roved by CENELEC on 1994-12-06. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document on a national level. Up-to-date lists and bibliographical references concerning national implementation may b
16、e obtained on application to the Central Secretariat or to any CENELEC member. This Harmonization Document exists in three official versions (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland
17、, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Sta
18、ssart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. HD 609 S1:1995 E Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:39:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7879:1997 BSI 11-1998 2 Foreword This Harmonization Document was
19、 prepared by CENELEC Technical Committee SC 46XC, Multicore, Multipair and Quad Data communication cables. It was submitted to the CENELEC Unique Acceptance Procedure (UAP) in January 1994 and was approved by CENELEC as HD 609 S1 on 1994-12-06. The following dates were fixed: Wherever this standard
20、refers to Generic Specification, HD 608 S1:1992 is meant. NOTEThis HD 608 will be updated into a European Standard. For products which have complied with the relevant national standard before 1995-12-01, as shown by the manufacturer or by a certification body, this previous standard may continue to
21、apply for production until 2000-12-01. Contents 1Guide to use3 1.1Scope3 1.2Introduction3 1.3Installation considerations3 1.4Object3 2Definitions and requirements3 2.1General3 2.2Reference publications3 2.3Definitions3 2.4Materials and cable construction3 2.4.1General3 2.4.2Cable construction3 2.4.3
22、Conductor3 2.4.4Insulation4 2.4.5Colour code for insulation4 2.4.6Cabling element4 2.4.7Screening of cable element4 2.4.8Cable make-up4 2.4.9Screening of cable core4 2.4.10 Sheath4 2.4.11 Colour of sheath4 2.4.12 Identification4 2.4.13 Finished cable4 2.4.14 Cable overall diameter4 3Test Methods5 3.
23、1General5 3.2Electrical tests5 3.3Transmission tests5 3.4Mechanical and dimensional measurement tests5 3.5Environmental tests5 Annex A Operating Temperature Range6 Annex B Filling Factor of Braid6 latest date by which the existence of the HD has to be announced at national level. (doa) 1995-06-01 la
24、test date by which the HD has to be implemented at national level by publication of a harmonized national standard or by endorsement (dop) 1995-12-01 latest date by which the national standards conflicting with the HD have to be withdrawn(dow) 1995-12-01 Licensed Copy: London South Bank University,
25、London South Bank University, Fri Dec 08 12:39:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7879:1997 BSI 11-19983 1 Guide to use 1.1 Scope This sectional specification covers the equipment cables used for internal and external interconnections of electronic devices in networks for digital and a
26、nalog communications. The cables are insulated multicore, multipair and multiquad cables with or without screens. The cables are normally PVC sheathed. Where however a low smoke cable is required the cables shall be sheathed with a thermoplastic material having a low emission of smoke and corrosive
27、gases when affected by fire. The cables are suitable for use in dry indoor situations under the conditions specified in Annex A. The insulation of these cables is suitable for operation at voltages specified in the detail specifications. However these cables shall not be for direct connection to a l
28、ow impedance source, e.g. the public mains electricity supply. 1.2 Introduction See Generic Specification. 1.3 Installation considerations See Generic Specification. 1.4 Object The cables specified in this standard shall meet the requirements of the Generic Specification for multicore and symmetric
29、pair/quad cables for digital and analog communications. This sectional specification shall be supplemented with detail specifications giving additional detail as required by the particular application. 2 Definitions and requirements 2.1 General Definitions and requirements are given in the Generic S
30、pecification for symmetrical pairs, quads and multicore cables for digital and analog communication. 2.2 Reference publications See Generic Specification. Other publications referred to are: HD 602, Tests on gases evolved during combustion of materials from cables. HD 624.1, Materials used in commun
31、ication cables. HD 624.1-1: PVC insulation compounds. HD 624.1-2, PVC sheathing compounds. HD 624.3-3, PE insulation. HD 624.5-5, Polypropylene insulation compounds. HD 624.6-6, Halogen free flame retardant insulation compounds. HD 624.7-7, Halogen free flame retardant thermoplastic sheathing compou
32、nds. IEC 189-2, Low-frequency cables and wires with p.v.c. insulation and p.v.c. sheath. Part-2: Cables in pairs, triples, quads and quintuples for inside installations. IEC 189-6-6, Signalling cables in singles for telecommunication equipment and installation. IEC 344, Guide to the calculation of r
33、esistance of plain and coated copper conductors of low-frequency cables and wires. IEC 708-1, Low frequency cables with polyolefin insulation and moisture barrier polyolefin sheath Part 1: General design details and requirements. 2.3 Definitions See Generic Specification. 2.4 Materials and cable con
34、struction 2.4.1 General The choice of materials and cable construction shall be suitable for the intended application and installation of the cable. Particular care shall be taken to meet any special requirements for fire performance (such as burning properties, smoke generation, evolution of haloge
35、n acid gas etc). 2.4.2 Cable construction See Generic Specification. 2.4.3 Conductor The conductor shall be plain or tinned copper and stranded or bunched. The detail specification shall specify a conductor size. The following sizes are preferred: No of WiresNominal diameter of wire (mm) Reference c
36、ross-sectional area (mm2) 7 7 7 7 0,16 0,20 0,25 0,30 0,14 0,22 0,34 0,50 18 14 16 0,10 0,15 0,20 0,14 0,25 0,50 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:39:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7879:1997 4 BSI 11-1998 In order to determine
37、the maximum conductor resistance for the conductors, in accordance with IEC 344, the coefficient for tinned copper and a cabling lay factor greater than 16 shall be used. Also a twisting lay factor of greater than 16 shall be used for cables with pairs or quads. 2.4.4 Insulation The insulation shall
38、 be either: PVC; polyolefin; thermoplastic material having low emission of smoke and corrosive gases when affected by fire. 2.4.4.1 PVC The PVC insulation type TI 51 or TI 52 in accordance with HD 624.1, or other suitable PVC material meeting the detail specification requirements. 2.4.4.2 Polyolefin
39、 The polyolefin insulation shall be solid, cellular or composite insulation. The insulation material shall consist of low, medium or high density polyethylene in accordance with HD 624.3 or polypropylene in accordance with HD 624.5. 2.4.4.3 Thermoplastic material having low emission of smoke and cor
40、rosive gases when affected by fire The insulation material shall be in accordance with HD 624.6. 2.4.5 Colour code for insulation The insulated conductors shall be coloured by one colour or by two different colours in accordance with IEC 189-2:1988, subclause 2.2.4. 2.4.5.1 Core identification The p
41、referred coloured code for up to 48 conductors is to be in accordance with Appendix C of IEC 189-6:1982. 2.4.5.2 Pair identification The preferred colour code for up to 50 pairs is given in Appendix A of IEC 189-2:1988. 2.4.5.3 Quad identification The preferred colour code for up to 25 quads is give
42、n in Appendix E of IEC 708-1:1981. 2.4.6 Cabling element The cabling element shall be: single core, pair or quad for unscreened cables; single core, pair or quad for cables with a common screen; single core, pair or quad for cables with screened elements. 2.4.7 Screening of cable element When requir
43、ed in the detail specification a screen for the cabling element shall be provided. The screen shall be in accordance with subclause 2.4.6 of the Generic Specification. Where a copper braid is used it shall have a minimum filling factor of 0,41 (65 % coverage). Where a tape and braid screen is used t
44、he minimum filling factor of the braid shall be 0,16 (30 % coverage). The filling factor is defined in Annex B. 2.4.8 Cable make-up It is preferable that the cable elements be assembled in concentric layers. 2.4.9 Screening of cable core The screen shall be in accordance with subclause 2.4.9 of the
45、Generic Specification. Where a copper braid is used it shall have a minimum filling factor of 0,41 (65 % coverage). Where a tape and braid screen is used the minimum filling factor of the braid shall be 0,16 (30 % coverage). The filling factor is defined in Annex B. 2.4.10 Sheath 2.4.10.1 PVC sheath
46、 The PVC sheath shall be type TM 51 or TM 52 in accordance with HD 624.2. 2.4.10.2 Thermoplastic material having low emission of smoke and corrosive gases when affected by fire The sheath material shall be in accordance with HD 624.7. 2.4.10.3 Application The sheath shall be applied to fit closely t
47、o the laid up cable elements. The sheath shall not adhere to the insulation of the conductor of the outer layer, nor to the screen if provided. The sheath shall be as uniform as possible with a thickness not less than the value specified in the detail specification. 2.4.11 Colour of sheath The prefe
48、rred colour of the sheath is grey or blue. 2.4.12 Identification See Generic Specification. 2.4.13 Finished cable See Generic Specification. 2.4.14 Cable overall diameter The overall diameter of the cable shall not exceed the value specified in the detail specifications. Licensed Copy: London South
49、Bank University, London South Bank University, Fri Dec 08 12:39:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7879:1997 BSI 11-19985 3 Test Methods 3.1 General The detail specification defines the performance criteria of a cable and shall indicate limits required for tests which shall be selected from the following test methods. For any cable not all the tests listed may be required. 3.2 Electrical tests The tests shall be carried out on a cable length of not less than 100 m according to the following subclauses of the Generic Spec