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. ICS 13.220.40; 29.060.20 ISBN 0-626-17957-2 SANS 61034-2:2006Edition 3IEC 61034-2:2005Edition 3SOUTH AFRICAN NATIONAL STANDARD Measurement of smoke densi
4、ty of cables burning under defined conditions Part 2: Test procedure and requirements This national standard is the identical implementation of IEC 61034-2:2005 and is adopted with the permission of the International Electrotechnical Commission. Published by Standards South Africa 1 dr lategan road
5、groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 61034-2:2006 Edition 3 IEC 61034-2:2005 Edition 3 Table of changes Change No. Date Scope Abstract Provides details of the test procedure for the measu
6、rement of the density of smoke emitted from cables burning under defined conditions. Describes the means of preparing and assembling cables for test, the method of burning the cables, and gives recommended requirements for evaluating test results. Keywords combustion test methods, electric cables, f
7、ire tests, smoke. National foreword This South African standard was approved by National Committee StanSA TC 66, Electric cables, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS edition cancels and replaces the second SABS editi
8、on (SABS IEC 61034-2:1997). NORME INTERNATIONALE CEIIECINTERNATIONAL STANDARD 61034-2Troisime ditionThird edition2005-04Mesure de la densit de fumes dgages par des cbles brlant dans des conditions dfinies Partie 2: Procdure dessai et exigences Measurement of smoke density of cables burning under def
9、ined conditions Part 2: Test procedure and requirements Pour prix, voir catalogue en vigueur For price, see current catalogue IEC 2005 Droits de reproduction rservs Copyright - all rights reserved Aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et
10、par aucun procd, lectronique ou mcanique, y compris la photo-copie et les microfilms, sans laccord crit de lditeur. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing fro
11、m the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch Commission Electrotechnique InternationaleInternational Electrotechnical Commission P COD
12、E PRIX PRICE CODE PUBLICATION GROUPE DE SCURIT GROUP SAFETY PUBLICATION 61034-2 IEC:2005 3 CONTENTS FOREWORD.5 INTRODUCTION.9 1 Scope.11 2 Normative references11 3 Terms and definitions .11 4 Test apparatus .11 5 Test assembly 13 5.1 Test sample.13 5.2 Cable test piece selection and test sample asse
13、mbly .13 5.3 Positioning of test sample15 6 Test procedure .15 7 Evaluation of test results.17 8 Retest procedure 17 9 Test report17 Bibliography31 Annex A (informative) Guidance on the principles and use of smoke measurements .23 Annex B (informative) Recommended performance requirement.29 Figure 1
14、 Method of binding for bundles of test pieces 19 Figure 2 Method of support of test sample.21 61034-2 IEC:2005 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MEASUREMENT OF SMOKE DENSITY OF CABLES BURNING UNDER DEFINED CONDITIONS Part 2: Test procedure and requirements FOREWORD 1) The International E
15、lectrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fiel
16、ds. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC
17、 National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardizati
18、on (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representa
19、tion from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cann
20、ot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publication
21、s. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC P
22、ublication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury,
23、property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited
24、 in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying
25、 any or all such patent rights. International Standard IEC 61034-2 has been prepared by IEC technical committee 20: Electric cables. This third edition cancels and replaces the second edition published in 1997. It constitutes a technical revision. The principal changes with respect to the previous e
26、dition are as follows: a) inclusion of cables down to 1 mm diameter; b) inclusion of non-circular cables; c) addition of guidance on testing cables above 80 mm diameter; d) delineation of elements of the test report; 61034-2 IEC:2005 7 e) addition of guidance on the calculation for other parameters
27、for fire safety engineering purposes; f) removal of minor differences with equivalent CENELEC work to allow parallel voting with that body. It has the status of a group safety publication in accordance with IEC Guide 104. The text of this standard is based on the following documents: FDIS Report on
28、voting 20/755/FDIS 20/767/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. IEC 61034 consists of the following parts, under the
29、general title Measurement of smoke density of cables burning under defined conditions, Part 1 : Test apparatus Part 2 : Test procedure and requirements The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web sit
30、e under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 61034-2 IEC:2005 9 INTRODUCTION The measurement of smoke density is an important aspect in the evaluation of the b
31、urning performance of cables as it is related to the evacuation of persons and accessibility for firefighting. IEC 61034 is published in two parts, which together specify a method of test for measurement of smoke density of cables burning under defined conditions. Users of this test are reminded tha
32、t the configurations of cable in the test (i.e. as test pieces or bundles of test pieces) may not represent actual installation conditions. Part 1 gives details of the test apparatus and verification procedure to be used for the measurement of smoke density of the products of combustion of cables bu
33、rnt under defined conditions. It includes details of a test enclosure of 27mvolume, a photometric system for light measurement, the fire source, smoke mixing method and a qualification procedure. This Part 2 gives the test procedure, together with an informative annex giving recommended requirements
34、 for compliance where no specified requirement is given in the particular cable standard or specification. The measurement of smoke density is expressed in terms of minimum levels of light transmittance, and Annex A explains possibilities for using these values for fire safety engineering calculatio
35、ns. 61034-2 IEC:2005 11 MEASUREMENT OF SMOKE DENSITY OF CABLES BURNING UNDER DEFINED CONDITIONS Part 2: Test procedure and requirements 1 Scope This part of IEC 61034 provides details of the test procedure to be employed for the measurement of the density of smoke emitted from cables burning under d
36、efined conditions. It describes the means of preparing and assembling cables for test, the method of burning the cables, and gives recommended requirements for evaluating test results. 2 Normative references The following referenced documents are indispensable for the application of this document. F
37、or dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60695-4, Fire hazard testing Part 4: Terminology concerning fire tests IEC 61034-1, Measurement of smoke density of cables burning under
38、defined conditions Part 1: Test apparatus IEC Guide 104:1997, The preparation of safety publications and the use of basic safety publications and group safety publications ISO/IEC 13943:2000, Fire safety Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions
39、in IEC 60695-4 apply, or if a term is not defined in IEC 60695-4 then the definition in ISO/IEC 13943 applies. 4 Test apparatus The test procedure defined in this Part 2 of IEC 61034 shall be carried out using the test apparatus, i.e. test enclosure, photometric system and standard fire source, give
40、n in IEC 61034-1. 61034-2 IEC:2005 13 5 Test assembly 5.1 Test sample The test sample shall consist of one or more test pieces of cable, each 1,00 m 0,05 m long, which shall be carefully straightened and then conditioned for at least 16 h at 23 C 5 C. 5.2 Cable test piece selection and test sample a
41、ssembly 5.2.1 Selection of number of test pieces 5.2.1.1 Cables with an overall diameter of 5 mm or greater For cables with an overall diameter of 5 mm or greater, the number of test pieces required to make up the test sample shall be in accordance with Table 1. Table 1 Number of test pieces Overall
42、 diameter of the cable (D) mm Number of test pieces D 40 20 D 40 10 D 20 5 D 10 1 2 3 N1where N1= 45Dtest pieces The value of N1shall be rounded downwards to the integer to give the number of test pieces. 5.2.1.2 Cables with an overall diameter of less than 5 mm, but not less than 1 mm For cables wi
43、th an overall diameter of less than 5 mm, but not less than 1 mm, seven test pieces shall be formed into a bundle. The number of bundles (N2) required to make up the test sample shall be calculated according to the following formula: N2= D345The value of N2shall be rounded downwards to the integer t
44、o give the number of bundles. For each bundle, the seven test pieces shall be twisted together with a lay between 20 D and 30 D and bound with two turns of approximately 0,5 mm diameter wire in the centre and at every 100 mm each side from the centre (see Figure 1). 61034-2 IEC:2005 15 5.2.1.3 Non-c
45、ircular cables The test sample for non-circular cables shall be a flat horizontal unit in which the minor axis of each test piece is presented to the fire source. The following criteria for determination of the number of test pieces required to make up the test sample shall apply: a) the nominal min
46、or axis shall be used as the diameter (D) for cables in which the major to minor axis ratio is equal to or less than 3; b) half the circumference of the cable shall be used to calculate an equivalent diameter for cables in which the major to minor axis ratio lies between 3 and 5; c) for cables in wh
47、ich the major to minor axis ratio exceeds 5, or the dimension of the minor axis is less than 2,0 mm, the formation of the assembly remains under consideration 5.2.2 Mounting of test sample The test sample shall remain in situ during the test as follows: individual test pieces or bundles of test piec
48、es shall be bound together at the ends, and at 300 mm from each end, at which place they shall be clamped to the support by means of wire binders. NOTE Depending upon construction, test samples prepared from small cables or flexible cables may be subject to movement during the test. In these cases,
49、it is also recommended that the test pieces or bundles are bound with two turns of approximately 0,5 mm diameter wire in the centre and at every 100 mm each side from the centre. Alternatively, the test pieces or bundles may be tensioned at one or both ends by means of an appropriate device, for example a spring or a weight. 5.3 Positioning of test sample The tray containing the alcohol shall be supported above the ground surfa
