SANS 5502-2009 Burning test on cable dielectric and outer coverings《电缆介质和外覆层的焚烧测试》.pdf

《SANS 5502-2009 Burning test on cable dielectric and outer coverings《电缆介质和外覆层的焚烧测试》.pdf》由会员分享，可在线阅读，更多相关《SANS 5502-2009 Burning test on cable dielectric and outer coverings《电缆介质和外覆层的焚烧测试》.pdf（6页珍藏版）》请在麦多课文档分享上搜索。

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22816-3 SANS 5502:2009Edition 3 SOUTH AFRICAN NATIONAL STANDARD Burning test on cable dielectric and outer coverings Published by SABS Sta

4、ndards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 5502:2009 Edition 3 Table of changes Change No. Date Scope Foreword This South African standard was approved by National Committee SABS TC 66, Electric cable

5、s, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in May 2009. This document supersedes SABS SM 502:1980 (first revision). SANS 5502:2009 Edition 3 1Burning test on cable dielectric and outer coverings 1

6、Scope This standard specifies a method to determine the burning resistance of cable dielectric and outer coverings. 2 Apparatus 2.1 Burner, that has a nozzle of nominal bore 10 mm. 2.2 Laboratory stand, that has a clamp to support the test specimen. 2.3 Stop-watch or stop-clock 2.4 Three-sided sheet

7、 metal screen, of height 1 200 mm, of width 300 mm, of depth 450 mm, and open at the top and the front. 3 Test specimen One specimen, 100 mm long, cut at random from the finished cable, and that has the conductor or cores left in place but any external covering, which is not required to be tested, r

8、emoved. 4 Conditioning Condition the specimen(s) for at least 16 h at a temperature of (23 2) C in an atmosphere of relative humidity (50 5) %. 5 Procedure 5.1 Situate the burner in still air and protect it by the sheet metal screen. 5.2 So adjust the flame as to have an overall height of 150 mm and

9、 an inner blue cone of height 50 mm. 5.3 So insert a bare copper wire, of diameter 0,7 mm and a free length of at least 100 mm, in the flame that its axis is horizontal and 50 mm above the top of the burner and the free end of the wire is vertically in line with the edge of the nozzle on the side re

10、mote from the supported end of the wire. 5.4 The wire shall melt within 6 s to 8 s. SANS 5502:2009 Edition 3 2 5.5 Within 10 min after the removal of the specimen from the controlled atmosphere, so clamp the specimen in the stand that its longitudinal axis is horizontal. 5.6 With the burner in a ver

11、tical position, apply the flame to the free end of the specimen. 5.7 After 60 s remove the flame and, immediately after the specimen self-extinguishes, re-apply the flame for a further 30 s. 5.8 Record the period during which the specimen continues to burn after each application of the flame. SABS S

12、ABS Standards Division The objective of the SABS Standards Division is to develop, promote and maintain South African National Standards. This objective is incorporated in the Standards Act, 2008 (Act No. 8 of 2008). Amendments and Revisions South African National Standards are updated by amendment

13、or revision. Users of South African National Standards should ensure that they possess the latest amendments or editions. The SABS continuously strives to improve the quality of its products and services and would therefore be grateful if anyone finding an inaccuracy or ambiguity while using this st

14、andard would inform the secretary of the technical committee responsible, the identity of which can be found in the foreword. Tel: +27 (0) 12 428 6666 Fax: +27 (0) 12 428 6928 The SABS offers an individual notification service, which ensures that subscribers automatically receive notification regard

15、ing amendments and revisions to South African National Standards. Tel: +27 (0) 12 428 6883 Fax: +27 (0) 12 428 6928 E-mail: salessabs.co.za Buying Standards Contact the Sales Office for South African and international standards, which are available in both electronic and hardcopy format. Tel: +27 (0

16、) 12 428 6883 Fax: +27 (0) 12 428 6928 E-mail: salessabs.co.za South African National Standards are also available online from the SABS website http:/www.sabs.co.za Information on Standards The Standards Information Centre provides a wide range of standards-related information on both national and i

17、nternational standards, and is the official WTO/TBT enquiry point for South Africa. The Centre also offers an individual updating service called INFOPLUS, which ensures that subscribers automatically receive notification regarding amendments to, and revisions of, international standards. Tel: +27 (0

18、) 12 428 6666 Fax: +27 (0) 12 428 6928 E-mail: infosabs.co.za Copyright The copyright in a South African National Standard or any other publication published by the SABS Standards Division vests in the SABS. Unless exemption has been granted, no extract may be reproduced, stored in a retrieval syste

19、m or transmitted in any form or by any means without prior written permission from the SABS Standards Division. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any purpose other than implementation, prior written permission must be obtained. Details and advice can be obtained from the Senior Manager. Tel: +27 (0) 12 428 6666 Fax: +27 (0) 12 428 6928 E-mail: infosabs.co.za