BS-7655-2.2-1993.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7655 : Section 2.2 : 1
2、993 Implementing Amendment No. 1, not published separately NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Insulating and sheathing materials for cables Part 2. Elastomeric sheathing compounds Section 2.2 Heat resisting types Licensed Copy: London South Bank
3、University, London South Bank University, Fri Dec 08 12:03:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655 : Section 2.2 : 1993Issue 2, February 1997 This British Standard, having been prepared under the direction of the Cables and Insulation Standards Policy Committee, was published under the
4、 authority of the Standards Board and comes into effect on 15 April 1993 BSI 1997 The following BSI references relate to the work on this standard: Committee reference CIL/20 Draft for comment 92/25662 DC ISBN 0 580 22028 1 Amendments issued since publication Amd. No.DateText affected 9219February 1
5、997 Indicated by a line in the margin Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Cables and Insulation Standards Policy Committee (CIL/-) to Technical Committee CIL/20, upon which the following bodies were represented: Aluminium Fed
6、eration Association of Consulting Engineers Association of Manufacturers of Domestic Electrical Appliances British Approvals Service for Cables British Cable Makers Confederation British Plastics Federation British Steel Industry Department of the Environment (Property Services Agency) Department of
7、 Trade and Industry (Consumer Safety Unit, CA Division) Electricity Association Engineering Equipment and Materials Users Association Institution of Electrical Engineers London Regional Transport The following bodies were also represented in the drafting of the standard, through subcommittees and pa
8、nels: British Railways Board British Rubber Manufacturers Association Ltd. British Telecommunications plc ERATechnology Ltd. GAMBICA (BEAMA Ltd.) Institution of Incorporated Executive Engineers London Underground Ltd. Queen Mary and Westfield College Telecommunications Cables Group of BCMC Warringto
9、n Fire Research Centre Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:03:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Issue 1, February 1997BS 7655 : Section 2.2 : 1993 BSI 1997i Contents Page Committees responsibleInside front cover Forewordii Specificatio
10、n 1Scope1 2Normative references1 3Definitions1 4Test requirements for physical properties1 Tables 1Types of heat resisting elastomeric sheathing compounds1 2Test methods1 3Test requirements2 4Tolerances on temperature values2 List of referencesInside back cover Licensed Copy: London South Bank Unive
11、rsity, London South Bank University, Fri Dec 08 12:03:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 1997 BS 7655 : Section 2.2 : 1993Issue 1, February 1997 Foreword This Section of BS 7655 has been prepared under the direction of the Cables and Insulation Standards Policy Committee. This Sect
12、ion specifies the physical properties of heat resisting elastomeric sheathing compounds. For a general introduction to the BS 7655 series and a list of Parts and Sections, Part 0 should be consulted. Compliance with a British Standard does not of itself confer immunity from legal obligations. Licens
13、ed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:03:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 19971 Issue 2, February 1997BS 7655 : Section 2.2 : 1993 Specification | | 1 Scope This Section specifies the physical properties of heat resisting elastomeric shea
14、thing compounds given in table 1. The relevant test methods for verification of conformity are given in BS EN 60811. This Section is to be used in conjunction with BS 7655 : Part 0. Table 1. Types of heat resisting elastomeric sheathing compounds TypeMaximum material operating temperature C General
15、application EI 2180Ordinary duty silicone rubber 2 Normative references This Section of BS 7655 incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed on the inside bac
16、k page. For a dated reference, only the edition cited applies; any subsequent amendments to or revisions of the publication apply to this British Standard only when incorporated in the reference by amendment or revision. For undated references, any amendment to, or the latest edition of, the cited p
17、ublication applies. 3 Definitions For the purposes of this Section of BS 7655 the definitions given in BS 1755 : Part 1, BS 1755 : Part 2, BS 3558, BS 4727 : Part 2 : Group 08 and BS 7655 : Part 0 apply, together with the following. 3.1 variation The difference between the median value after ageing
18、and the median value without ageing expressed as a percentage of the latter. 3.2 median value When several tests results have been obtained and ordered in an increasing or decreasing succession, the median is the middle value if the number of available values is odd and is the mean of the two middle
19、 values if the number is even. | | | | | | | | | | | | | 4 Test requirements for physical properties 4.1 General 4.1.1 The test methods shall be as specified in table 2 and the method of pre-conditioning shall be as described in 4.2. The temperatures used for the test methods shall conform to the co
20、nditions specified in 4.3. Table 2. Test methods (in accordance with BS EN 60811 unless otherwise stated) TestMethod BS EN 60811Clause Properties in the state as delivered Tensile strength and elongation at break 1.1 : 19959.2 Properties after ageing in air oven Tensile strength and elongation at br
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