BS EN 8491-2008 Method for assessment of fire integrity of large diameter power cables for use as components for smoke and heat control systems and certain othe.pdf
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1、BS 8491:2008 Method for assessment of fire integrity of large diameter power cables for use as components for smoke and heat control systems and certain other active fire safety systems ICS 13.220.40; 29.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD L
2、icensed copy:PONTYPRIDD COLLEGE, 04/03/2008, Uncontrolled Copy, BSI Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2008 ISBN 978 0 580 57269 2 The following BSI references relate to the work on this standard:
3、Committee reference GEL/20/18 Draft for comment 06/30152609 DC Publication history First published January 2008 Amendments issued since publication Amd. no.DateText affected BS 8491:2008 Licensed copy:PONTYPRIDD COLLEGE, 04/03/2008, Uncontrolled Copy, BSI BSI 2008i BS 8491:2008 Contents Foreword iii
4、 1Scope 1 2Normative references 1 3Terms and definitions 1 4Test chamber 1 5Apparatus 2 6Verification procedure for the source of heat 11 7Test specimens 12 8Test procedure 15 9Test report 18 Annexes Annex A (informative) Guidance on the provision of a suitable test chamber 19 Bibliography 20 List o
5、f figures Figure 1 Schematic of the test configuration5 Figure 2 Plan view of apparatus 6 Figure 3 End elevation view of apparatus 7 Figure 4 Rubber bush 8 Figure 5 Arrangement of holes on burner face 8 Figure 6 Position of water jet device 9 Figure 7 Temperature measuring arrangement 10 Figure 8 Ex
6、ample of mounting of a larger diameter test specimen 13 Figure 9 Example of mounting of a smaller diameter test specimen 14 Figure 10 Basic circuit diagram 16 Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 20, an inside back cover and a back
7、cover. Licensed copy:PONTYPRIDD COLLEGE, 04/03/2008, Uncontrolled Copy, BSI BS 8491:2008 ii BSI 2008This page deliberately left blank Licensed copy:PONTYPRIDD COLLEGE, 04/03/2008, Uncontrolled Copy, BSI ? BSI 2008iii BS 8491:2008 Foreword Publishing information This British Standard is published by
8、BSI and came into effect on 31 January 2008. It was prepared by Subcommittee GEL/20/18, Fire testing, under the authority of Technical Committee GEL/20, Electric cables. A list of organizations represented on this committee can be obtained on request to its secretary. Relationship with other publica
9、tions The test method given in this British Standard is technically identical with the test method given in BS 7346-6:2005, Annex B. It is intended that when BS 7346-6:2005 is amended Annex B will be taken out. Information about this document The test method given in this British Standard includes s
10、ubjecting the cable under test to radiation via direct impingement corresponding to a constant temperature attack of 842 C, to direct mechanical impacts corresponding to a force of approximately 10 N, and to direct application of a water jet simulating a water fire fighting jet. NOTEAlthough this te
11、st method has changes to accommodate the application of impacts and the water jet, it is based on the test method given in BS EN 50362, which has the constant temperature attack of 842 C. This is the same constant temperature attack as used in the test method given in BS EN 50200. BS 7346-6 specifie
12、s three fire survival times depending upon the application of the cables: either 30 min or 60 min for life safety systems (LS), and 120 min for fire fighting systems (FF). The test method given in this British Standard includes three different test durations to allow testing of cables intended for t
13、hese different applications. It is emphasized that fire tests do not assess a fire hazard, nor can the results of fire tests alone guarantee safety. They only provide information to assist in the assessment of the suitability of a cable for a given application. Hazard warnings Use of this document I
14、t has been assumed in the preparation of this British Standard that the execution of its provisions will be entrusted to appropriately qualified and experienced people, for whose use it has been produced. WARNING. This British Standard calls for the use of substances and/or procedures that can be in
15、jurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. The test given in this British Standard may involve the use of dangerous voltages and temperatures. Suitab
16、le precautions should be taken against the risk of shock, burning, fire and explosion that may be involved and against any noxious fumes that may be produced. Licensed copy:PONTYPRIDD COLLEGE, 04/03/2008, Uncontrolled Copy, BSI ? BS 8491:2008 iv BSI 2008 Presentational conventions The provisions of
17、this standard are presented in roman (i.e. upright) type. Its methods are expressed as a set of instructions, a description, or in sentences in which the principal auxiliary verb is “ shall” . Commentary, explanation and general informative material is presented in smaller italic type, and does not
18、constitute a normative element. Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Licensed
19、copy:PONTYPRIDD COLLEGE, 04/03/2008, Uncontrolled Copy, BSI ? BSI 20081 BS 8491:2008 1 Scope This British Standard describes a method for assessment of the fire integrity of large diameter power cables for use as components for smoke and heat control systems as given in BS 7346-6, and certain other
20、active fire safety systems. It is applicable to cables of rated voltage not exceeding 600/1 000 V and of overall diameter greater than 20 mm. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited
21、 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS EN 60529:1992, Specification for degrees of protection provided by enclosures (IP code) BS EN 60584-1, Thermocouples Part 1: Reference tables BS EN 60695-4, Fire hazard testing Part
22、 4: Terminology concerning fire tests for electrotechnical products BS EN ISO 13943, Fire safety Vocabulary IEC 60269-3, Low-voltage fuses Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications) Examples of standardized systems
23、of fuses A to F 3 Terms and definitions For the purposes of this British Standard the terms and definitions given in BS EN ISO 13943 and BS EN 60695-4 apply. 4 Test chamber The test shall be carried out in a suitable chamber of minimum volume 10 m3, with facilities for disposing of any noxious gases
24、 resulting from burning. Sufficient ventilation shall be available to sustain the burner flame (see 5.3) for the duration of the test. The locations of any air inlets and exhaust chimney shall be such that the burner flame remains stable during the verification procedure and during the tests. NOTE 1
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