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1、BRITISH STANDARD BS 8434-1:2003 Incorporating Amendment No. 1 Methods of test for assessment of the fire integrity of electric cables Part 1: Test for unprotected small cables for use in emergency circuits BS EN 50200 with addition of water spray ICS 13.220.40; 29.060.20 ? Licensed Copy: London Sout
2、h Bank University, London South Bank University, Fri Dec 08 01:13:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8434-1:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 14 August 2003 BSI 18 November 2005 The following BSI references re
3、late to the work on this British Standard: Committee reference GEL/20/18 Draft for comment 02/209891 DC ISBN 0 580 42255 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee, GEL/20, Electric cables, to Subcommittee GEL/20/1
4、8, Fire test methods, upon which the following bodies were represented: BEAMA Installation Ltd. British Approvals Service for Cables British Cables Association British Plastics Federation DTI Consumer Safety Unit Electricity Association ERA Technology Ltd. Institute of Fire Prevention Officers MOD U
5、K Defence Standardisation Network Rail Nuclear Industry Fire Safety QinetiQ Amendments issued since publication Amd. No.DateComments 1584618 November 2005See Foreword Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 01:13:21 GMT+00:00 2006, Uncontrolled Copy, (c)
6、 BSI BS 8434-1:2003 BSI 18 November 2005 i Contents Page Committees responsibleInside front cover Forewordii 1Scope 1 2Normative references 1 3Terms and definitions 1 4Duration of survival 1 5Test environment 1 6Test apparatus 1 7Verification procedure for source of heat 2 8Test sample 2 9Cable test
7、 procedure 2 10Test report 3 Bibliography 5 Figure 1 Water spray tube 3 Figure 2 Water spray application 4 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 01:13:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8434-1:2003 ii BSI 18 November 2005 Foreword BS 8434
8、-1:2003 has been prepared by GEL/20, Electric cables, through its Subcommittee GEL/20/18. UK has been granted (D116/088) derogation from standstill in respect of the publication of BS 8434-1:2003. A number of clauses in this standard are, by numbering and content, identical to the equivalent clause
9、in BS EN 50200:2000. Such clauses are identified with the words “The provisions of BS EN 50200 shall apply” and are intended to be read as though the relevant wording from that standard was included at that point. !Changes as a result of Amendment 1:2005 are indicated by tags (!“) in the text.“ It h
10、as been assumed in the drafting of this British Standard that the execution of its provisions is entrusted to appropriately qualified staff and experienced people, for whose guidance it has been prepared. This publication does not purport to include all the necessary provisions of a contract. Users
11、are responsible for its 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, pages 1 to 5 and a back cover. The BSI copyright notice displayed
12、in this document indicates when the document was last issued. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 01:13:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8434-1:2003 BSI 18 November 2005 1 1 Scope This British Standard specifies a method of test to be
13、 used for small unprotected cables where, in addition to the requirements of BS EN 50200, a means of applying a water spray to the cable during the test is required. Compliance with the requirements of BS 5839-1:2002, 26.2d) may be demonstrated using this method. NOTE This water spray application is
14、 included as an option in a proposed amendment (prA1) to EN 50200 that is currently within CENELEC Procedures. UK has been granted derogation from standstill in respect of the publication of BS 8434-1:2003. It is emphasized that the fire tests do not assess a fire hazard, nor can the results of the
15、fire tests alone guarantee safety. They only provide information to assist in the assessment of the suitability of a cable for a given application. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the referen
16、ce cited applies. For undated references, the latest edition of the referenced document (including any amendments). BS EN 50200, Method of test for resistance to fire of unprotected small cables for use in emergency circuits. 3 Terms and definitions The terms and definitions given in BS EN 50200 app
17、ly. 4 Duration of survival 4.1 Time !The duration of the test shall be 30 min (15 min for the initial fire and impact phase followed by an additional 15 min for the fire, impact and water phase), during which the cable shall not reach the point of failure. Conformity to this requirement shall qualif
18、y for a 30 min classification. NOTE 1 The 30 min classification meets the requirement specified in BS 5839-1:2002, 26.2d) (see Clause 1 of the present standard). NOTE 2 Particular product standards or specifications may use the same test protocol, and may contain other durations of test that do not
19、lead to a classification under this standard.“ 4.2 Point of failure The provisions of BS EN 50200 shall apply. 5 Test environment The provisions of BS EN 50200 shall apply. 6 Test apparatus 6.1 Test equipment. In addition to the provisions of BS EN 50200, the test equipment shall include a water spr
20、ay device as described in 6.6. 6.2 Wall and its mounting, conforming to BS EN 50200. 6.3 Continuity checking arrangement, conforming to BS EN 50200. 6.4 Source of heat, conforming to BS EN 50200 except that the nominal burner face width shall be 10 mm. 6.5 Shock producing device, conforming to BS EN
21、 50200. 6.6 Water spray device, consisting of a metallic tube (copper or stainless steel) of nominal thickness 1.00 mm and overall diameter (15.5 1.0) mm, closed at one end and open at the other to allow the inflow of water. The tube shall have one row of 17 holes of 0.85 mm nominal diameter drilled
22、 on 30 mm centres as shown in Figure 1. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 01:13:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8434-1:2003 2 BSI 18 November 2005 The bar shall be positioned centrally with respect to the test sample as shown in Fi
23、gure 2. It shall be supplied by water at a flow rate of (0.80 0.05) l/min. NOTE 1 The input water pressure should be sufficient to meet the specified water flow rate. This should be verified by volumetric measurement. The tube shall be capable of adjustment such that the resulting water spray is cen
24、tralized around the burned portion of the test sample. The use of a metal plate device over the burner to avoid ingress of water is permitted. If a plate is used, the calibration shall be carried out with the metal plate in place. NOTE 2 A metal plate 0.4 mm thick extending horizontally 12 mm from t
25、he burner face and fixed 12 mm vertically above the centre line of the burner has been found to be satisfactory. 7 Verification procedure for source of heat The provisions of BS EN 50200 apply, except that if the metal plate device over the burner is used (see 6.6), it shall be in place for the veri
26、fication procedure. 8 Test sample The provisions of BS EN 50200 shall apply. 9 Cable test procedure 9.1 General The provisions of BS EN 50200 shall apply. 9.2 Procedure for different cable types The provisions of BS EN 50200 shall apply. 9.3 Ignition and shock production The provisions of BS EN 5020
27、0 shall apply. 9.4 Electrification or optical monitoring The provisions of BS EN 50200 shall apply. 9.5 Application of water spray After the required period of exposure in accordance with 9.3, with the flame and shock still being applied, start the water spray in accordance with 6.6. Continue applyi
28、ng the water for the time required by the relevant requirement for resistance to fire and water. WARNING If the application of the water extinguishes the flame then, for safety reasons, turn the gas supply off and consider the test invalid. The point of failure shall be as defined in 4.2. 9.6 End-po
29、int Continue the test either: a) until 15 min of fire and impact alone, followed by 15 min of fire, impact and water has been completed; or b) to the point of failure. The point of failure shall be as defined in 4.2. Licensed Copy: London South Bank University, London South Bank University, Fri Dec
30、08 01:13:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8434-1:2003 BSI 18 November 2005 3 10 Test report The test report shall include the following information: a) the number of this British Standard; b) full description of cable tested; c) manufacturer of cable tested; d) test voltage or test w
31、avelength; e) any options used in methodology (i.e. type of test wall, mass flow meter), and point of failure mechanism; f) use of the metal plate with the water spray application; g) type and disposition of clips supporting cable sample; h) the actual cable bending radius used for the test; i) meth
32、od used for temperature monitoring during the verification procedure; j) the survival time achieved; !k) The classification, if any, claimed. NOTE The only classification possible against BS 8434-1 is 30 min.“ Key 1 Inflow of water 2 Closed end 3 Metallic tube H 17 holes, 0.85 at 30 mm centres ( = (
33、15.5 1.0) mm nominal) Figure 1 Water spray tube 12 3 HHHHH Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 01:13:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8434-1:2003 4 BSI 18 November 2005 All dimensions in millimetres Key 1 Test wall4 Metal plate (see 6
34、.6) 2 Water spray tube5 Burner 3 Test sample6 Spray bar holes directed at sample 7 Centre-point of spray Figure 2 Water spray application 50 5 40 2 145 10 2 7 6 4 3 1 5 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 01:13:21 GMT+00:00 2006, Uncontrolled Copy, (
35、c) BSI BS 8434-1:2003 BSI 18 November 2005 5 Bibliography Standards publications BS 5839-1:2002, Fire detection and alarm systems for buildings Part 1: Code of practice for system design, installation, commissioning and maintenance. Licensed Copy: London South Bank University, London South Bank Univ
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