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1、BRITISH STANDARD BS 4808-3: 1972 Specification for L.F. cables and wires with PVC insulation and PVC sheath for telecommunication Part 3: Cables and equipment wires, with solid or stranded conductors, screened, single UDC 621.39.03:621.315.2/.3:621.315.616:678.743.22 Licensed Copy: sheffieldun sheff
2、ieldun, na, Fri Dec 01 01:59:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4808-3:1972 This British Standard, having been approved by the Telecommunication Industry Standards Committee, was published under the authority of the Executive Board on 31 August 1972 BSI 10-1999 The following BSI refere
3、nces relate to the work on this standard: Committee references TLE/6 and TLE/6/7 Draft for comment 70/6545 ISBN 0 580 07273 8 Co-operating organizations The Telecommunication Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from th
4、e following Government Departments and scientific and industrial organizations: The Government department and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committees entrusted with the preparation of
5、this British Standard: British Broadcasting CorporationElectronic Valve and Semi-Conductor British Electrical and Allied Manufacturers Manufacturers Association AssociationHome Office British Radio Equipment Manufacturers Institution of Electrical Engineers AssociationInstitution of Electronic and R
6、adio Engineers British Radio Valve ManufacturersInstitution of Production Engineers AssociationMinistry of Defence* British Railways Board*Ministry of Defence, Army Department Cable and Wireless LimitedMinistry of Defence, Navy Department Crown Agents for Oversea Governments and Post Office* Adminis
7、trationsRadio and Electronic Component Manufacturers Department of Employment and Productivity Federation (H.M. Factory Inspectorate)Relay Services Association of Great Britain Department of Trade and IndustryScience Research Council Radio and Space Electrical Contractors Association Research Statio
8、n (Incorporated)Scientific Instrument Manufacturers Electricity Council, The Central Electricity Association Generating Board and The AreaSociety of British Aerospace Companies Boards in England and WalesTelecommunication Engineering and Electrical Research AssociationManufacturing Association* Elec
9、tronic Engineering Association* British Non-Ferrous Metals FederationElectric Cable Makers Confederation Copper Development AssociationHigh Conductivity Copper Group Department of the EnvironmentHome Telephone Cable Makers Association Amendments issued since publication Amd. No.Date of issueComments
10、 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:59:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4808-3:1972 BSI 10-1999i Contents Page Co-operating organizationsInside front cover Forewordii 1Scope1 2Class1 3Requirements1 Table 1 Details of completed cables and equipment wires2 Table
11、2 Details of general requirements and tests3 Table 3 Colours for insulation3 Table 4 Colour of sheath3 Publication referred to4 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:59:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4808-3:1972 ii BSI 10-1999 Foreword Reference should be made t
12、o Part 1 of this specification for general requirements and tests. This Part supersedes PD 6455, “Metric dimensions for l.f. cables and wires for telecommunication”, for the conductor sizes concerned and is based on IEC Publication 189-5, “Low-frequency cables and wires with p.v.c. insulation and p.
13、v.c. sheath”, Part 5, “Equipment wires and cables with solid or stranded conductors, p.v.c. insulated, screened, single or one pair”. NOTEAttention is drawn to certification facilities offered by BSI; see the inside back cover of this standard. A British Standard does not purport to include all the
14、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, pages i and ii, p
15、ages 1 to 4, 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: sheffieldun sheffieldun, na, Fri Dec 01 01:59:23 GMT+00:00 2006, U
16、ncontrolled Copy, (c) BSI BS 4808-3:1972 BSI 10-19991 1 Scope This British Standard gives details of construction, materials, dimensions and requirements for screened cables and screened equipment wires, all with a single solid or stranded conductor and PVC insulation. Examples of usage are: inside
17、telephone and telegraph exchanges and the internal wiring of electronic and other equipment. NOTEThe title of the British Standard referred to in this standard is shown on page 4. 2 Class The basis of the classification shown in this Part is that given in Part 2, Table 1, Column 1. Suffix letters fo
18、llowing the class numbers are explained at the foot of Table 1 and are as follows: SLM = Lapped screen and sheathed SBM = Braided screen and sheathed SB = Braided screen As defined in Part 1 of this specification, all sheathed items are designated as cables. 3 Requirements 3.1 Cables and equipment w
19、ires prescribed by this Part shall meet the general requirements of Part 1 and when tested in accordance with the methods specified in Part 1 shall meet the detailed requirements in Table 1, Table 2, Table 3 and Table 4 of this Part. 3.2 Cables and equipment wires prescribed by this Part shall be su
20、bjected to a spark test at the relevant voltage detailed in Table 2 applied to: 1) the insulated conductor; 2) the completed cable. 3.3 A tape, preferably of polyethylene terephthalate, may be applied under the screen at the option of the manufacturer. 3.4 The flammability test specified in 3.2.2 of
21、 Part 1 is not applicable. 3.5 Manufacturers identification is not required. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:59:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4808-3:1972 2 BSI 10-1999 Table 1 Details of completed cables and equipment wires 12345678910111213141516 ClassCo
22、nductorInsulationScreenSheath Nominal area SolidStrandedResistance at 20 C BS 6746 compound type Radial thicknessDiameterWire diameter DiameterBS 674 compound type Radial thicknessOverall diameter Nominal diameter Nominal diameter No. and nominal diameter of strand MaximumNominal Minimum Maximum Nom
23、inal MaximumNominal Minimum Maximum mm2mmmmx/mm7/kmmmmmmmmmmmmmmmmm 1 SLM 0.200.5095.020.200.150.950.151.3510.500.402.55 2 SLM 0.22 0.28 0.39a 0.50 0.50 0.64a 0.60 0.70a 0.80 0.90 0.60 0.93 7/0.20 16/0.20 89.9 66.0 48.5 37.1 39.5 29.0 2 2 2 2 2 2 0.30 0.30 0.30 0.30 0.30 0.30 0.25 0.25 0.25 0.25 0.2
24、5 0.25 1.30 1.30 1.40 1.50 1.65 1.60 0.15 0.15 0.15 0.15 0.15 0.15 1.70 1.70 1.80 1.90 2.05 2.00 1 1 1 1 1 1 0.50 0.50 0.50 0.50 0.50 0.50 0.40 0.40 0.40 0.40 0.40 0.40 2.90 2.90 3.00 3.10 3.25 3.20 2 SBM 0.22 0.50 0.60 0.93 7/0.20 16/0.20 89.9 39.5 2 2 0.30 0.30 0.25 0.25 1.30 1.65 0.10 0.10 1.85 2
25、.20 1 1 0.50 0.50 0.40 0.40 3.05 3.40 3 SBM 0.50 0.75 0.93 1.14 16/0.20 24/0.20 39.5 26.3 1 1 0.60 0.60 0.50 0.50 2.25 2.45 0.10 0.10 2.80 3.00 1 1 0.50 0.50 0.40 0.40 4.00 4.20 2 SB0.22 0.50 0.60 0.93 7/0.20 16/0.20 89.9 39.5 2 2 0.30 0.30 0.25 0.25 1.30 1.65 0.10 0.10 1.85 2.20 3 SB 0.50 0.75 1.00
26、 0.93 1.14 1.32 16/0.20 24/0.20 32/0.20 39.5 26.3 19.4 1 1 1 0.60 0.60 0.60 0.50 0.50 0.50 2.25 2.45 2.65 0.10 0.10 0.10 2.80 3.00 3.20 SLM = Lapped screen and sheathedSBM = Braided screen and sheathedSB = Braided screen NOTEDesign recommendations for new equipment: First choice in bold type; this i
27、ndicates compliance with IEC Publication 189-5. Second choice in normal type; this indicates sizes supplementing the IEC range. a The use of sizes shown in italics should be restricted to existing equipment. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:59:23 GMT+00:00 2006, Uncontrolled
28、 Copy, (c) BSI BS 4808-3:1972 BSI 10-19993 Table 2 Details of general requirements and tests Table 3 Colours for insulation (to be specified by the purchaser) Table 4 Colour of sheath (to be specified by the purchaser) 12345 Requirements and testsRelevant Part 1 clause number Relevant details Class
29、1Class 2Class 3 Mechanical Construction and dimensions 2, 3.1.2 and 3.1.3 As in Table 1As in Table 1As in Table 1 Thermal Thermal endurance Test voltage (minimum r.m.s. value) 3.2.3 7501 0001 500 Electrical Conductor resistance3.3.1As in Table 1As in Table 1As in Table 1 A.C. spark test voltage (min
30、imum r.m.s. value) 1) Insulated conductor 2) Completed cable 3.3.2 3 000 2 000 4 000 2 000 6 000 2 000 Voltage test (minimum r.m.s. value)3.3.31 0001 5002 000 Insulation resistance (minimum) M7 km, at 20 5 C M7 m, at 70 2 Ca 3.3.4 50 3 50 3 10 0.5 a Applicable to screened wires when called for by th
31、e purchaser BLACK BLUE BROWN GREY GREEN ORANGE PINK RED TURQUOISE VIOLET WHITE YELLOW NOTE 1These colours are included in BS 6746C. NOTE 2With the exception of pink, all the colours are included in IEC Publication 304. GREY or CREAM Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:59:23 GMT
32、+00:00 2006, Uncontrolled Copy, (c) BSI BS 4808-3:1972 BSI 10-1999 4 Publication referred to This standard makes reference to the following British Standard: BS 6746C, Colour charts for PVC insulation and sheath of electric cables. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:59:23 GMT+
33、00:00 2006, Uncontrolled Copy, (c) BSI BS 4808-3:1972 BSI 10-1999 BSI Certification Trade Mark The Kitemark The British Standards Institution is the owner of a registered certification trade mark. It is usually associated with the words “approved to British Standard” as shown below, the number of th
34、e relevant British Standard being added. This mark may be used only by those licensed under the certification mark scheme operated by BSI. The presence of this mark on or in relation to a product is an assurance that the goods have been produced under a system of supervision, control and testing, op
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36、ritish Standards Institution, Maylands Avenue, Hemel Hempstead, Herts. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:59:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4808-3: 1972 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national
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45、se details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:59:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI