1、Electric cables Extended application of test results for reaction to firePD CLC/TS 50576:2016BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis Published Document is the UK implementation of CLC/TS 50576:2016.It supersedes PD CLC/TS 50576:2014 whic
2、h is withdrawn.The UK participation in its preparation was entrusted by TechnicalCommittee GEL/20, Electric cables, to Subcommittee GEL/20/18, ElectricCables - Fire testing.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purp
3、ort to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 93972 3ICS 13.220.40; 29.060.20Compliance with a British Standard cannot confer immunity fromlegal
4、 obligations.This Published Document was published under the authority of theStandards Policy and Strategy Committee on 31 January 2017.Amendments/corrigenda issued since publicationDate Text affectedPUBLISHED DOCUMENTPD CLC/TS 50576:2016TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZ
5、IFIKATION CLC/TS 50576 December 2016 ICS 13.220.40; 29.060.20 Supersedes CLC/TS 50576:2014 English Version Electric cables - Extended application of test results for reaction to fire Cbles lectriques - Application tendue des rsultats dessai Kabel und Leitungen - Erweiterte Anwendung von Prfergebniss
6、en This Technical Specification was approved by CENELEC on 2016-10-10. CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standar
7、ds in force. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Ma
8、lta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC
9、 Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. CLC/TS 50576:2016 E PD CLC/TS 50576:2016CLC/TS 50576:2016 (E) 2 Contents Page European foreword . 4 Introduction . 5 1 Scope . 6
10、 2 Normative references . 6 3 Terms and definitions 7 4 Extended application of test results (EXAP) . 9 4.1 Product families for EXAP . 9 4.1.1 General 9 4.1.2 Product families for power cables 9 4.1.3 Product families for communication cable 9 4.1.4 Product families for optical fibre cables 10 4.2
11、Specific and general EXAP 10 5 Specific EXAP with safety margin for power cables 10 5.1 Rules for specific EXAP for EN 50399 test 10 5.2 Extension to cables larger than the tested range . 13 6 General EXAP for power cables . 14 6.1 Rules for general EXAP for EN 50399 test . 14 6.2 Example of use of
12、general EXAP (FIGRA) where m = 1 . 16 6.3 Example of use of general EXAP (TSP) where m = 1 17 6.4 Example of use of general EXAP (TSP) where m is less than 1 18 7 Specific EXAP with safety margin for optical fibre cables 19 7.1 Rules for specific EXAP for EN 50399 test 19 8 EXAP rule for EN 50399 te
13、st for flaming droplets/particles for power, control and communication (copper or optical fibre) cables . 20 9 EXAP rule for EN 60332-1-2 test for classes B2ca,Cca, and Dcafor power, control and communication (copper or optical fibre) cables . 20 10 EXAP rule for EN 60332-1-2 test for class Ecafor p
14、ower, control and communication (copper or optical fibre) cables . 21 11 EXAP rule for EN 61034-2 test for classes s1a and s1b for power, control and communication (copper or optical fibre) cables . 22 Annex A (informative) Flow chart and checklist for specific EXAP for power cables . 23 A.1 Basic E
15、XAP procedure flow chart 23 A.2 Checklist for specific EXAP 24 Annex B (normative) Rounding of numbers . 25 Annex C (informative) Background information on EN 60332-1-2 and EN 61034-2 testing 26 C.1 Background information regarding EN 60332-1-2 testing . 26 C.2 Background information regarding EN 61
16、034-2 testing . 26 Bibliography 28 PD CLC/TS 50576:2016CLC/TS 50576:2016 (E) 3 Tables Table 1 Safety margins vsmfor power cables 11 Table 2 Allowed range of cable diameters and cable parameters for using safety margins as specified in Table 1 12 Table 3 Allowed ranges of dmaxfor EXAP applied for lar
17、ger cables . 13 Table 4 Safety margins smfor optical fibre cables 20 Table C.1 Time for flame application . 26 Table C.2 Number of test pieces for EN 610342 . 27 Table C.3 Evaluation of EN 610342 tests on product families 27 Figures Figure 1 Assessment of classfor the classification parameter TSP (t
18、heoretical example) 13 Figure 2 FIGRA results for cable family 17 Figure 3 TSP results for cable family . 18 Figure 4 TSP results for cable family . 19 Figure A.1 Flow chart of the EXAP procedure 23 PD CLC/TS 50576:2016CLC/TS 50576:2016 (E) 4 European foreword This document (CLC/TS 50576:2016) has b
19、een prepared by CLC/TC 20 “Electric cables”. The following date is proposed: latest date by which the existence of this document has to be announced at national level (doa) 2017-04-10 This document supersedes CLC/TS 50576:2014. This document has been prepared under a mandate given to CENELEC by the
20、European Commission and the European Free Trade Association. This document is meant to be used in conjunction with EN 50575 in order to evaluate the reaction to fire performance of power, control and communication cables. NOTE For the purposes of this Technical Specification, the term electric cable
21、s also covers optical fibre cables. PD CLC/TS 50576:2016CLC/TS 50576:2016 (E) 5 Introduction The original project “CEMAC CE marking of cables” was carried out over a three year period. It brought together cable manufacturers, research and testing laboratories, and research establishments in creating
22、 the technical background and developing rules and procedures for extended application of test results (EXAP). More than 200 tests to EN 50399 on more than 100 cables were carried out as part of the project. The final report 1 was published in 2010 and the EXAP rules and procedures developed by the
23、CEMAC project have been used as the basis for this Technical Specification. A specific EXAP procedure and rules based on the use of safety margins and a cable parameter derived from the extensive CEMAC tests was developed for the most common generic types of power cables used in the European market.
24、 A general EXAP procedure and rules based upon a statistical treatment of the actual test results obtained from a cable family was also developed for any power cables. However, the use of this general procedure and rules will generally require more tests to be carried out than the use of the specifi
25、c procedure and rules. Since the CEMAC project report was completed in 2010, the project has been extended to further investigate the performance of optical fibre cables and rules and procedures developed for extended application of test results for these products. An additional report 2 was publish
26、ed in 2015 and the EXAP rules and procedures developed by the further CEMAC project work have been used as the basis for the 2016 revision of this Technical Specification. General guidance on direct and extended application may be found in CEN/TS 15117 3. PD CLC/TS 50576:2016CLC/TS 50576:2016 (E) 6
27、1 Scope This Technical Specification gives the procedure and rules for extended application of results of tests carried out according to the test methods described in EN 50399, EN 60332-1-2 and EN 61034-2. The EXAP rules described apply to EN 50399 test results used for classification in classes B2c
28、a,Ccaand Dca, additional smoke production classes s1, s2 and s3 and flaming droplets/particles, to EN 60332-1-2 test results used for classification in classes B2ca,Cca,Dcaand Ecaand to EN 61034-2 test results used for classification in classes s1a and s1b. Cables of diameter 5,0 mm and less should
29、be tested as bundles according to EN 50399. Bundled cables are not included in the EXAP rules applying to EN 50399 test results. The rules apply to circular and non-circular cables provided that they fall within the scope of the relevant test method. A specific EXAP rule has been developed for the m
30、ost common generic power cable families and optical fibre cables. A general EXAP rule has been developed for any power cable families. The general EXAP rule is not applicable to communication or optical fibre cables. NOTE 1 Multicore power cables with more than 5 cores are sometimes referred to as c
31、ontrol cables with a rated voltage but for the purposes of this Technical Specification are considered as power cables. The general EXAP rule may be applied in the case of hybrid cables provided that the conditions of 6.1 are fulfilled. The use of the specific EXAP rule gives benefit in the lower nu
32、mber of cables to be tested for a range of cable constructions (product family). An EXAP is only possible when cables belong to a defined family as defined in this Technical Specification. NOTE 2 No EXAP procedure and rules have been developed in respect of the results of tests carried out according
33、 to the test method described in EN 607542. As the parameters (pH and conductivity) for each cable in a family are determined based upon calculation using material test results, this is considered as a matter of direct application. Material test results taken from any one sample of finished cable fr
34、om a family are sufficient to calculate the parameters for each cable in the family. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For u
35、ndated references, the latest edition of the referenced document (including any amendments) applies. EN 50399, Common test methods for cables under fire conditions - Heat release and smoke production measurement on cables during flame spread test - Test apparatus, procedures, results EN 60332-1-2, T
36、ests on electric and optical fibre cables under fire conditions - Part 1-2: Test for vertical flame propagation for a single insulated wire or cable - Procedure for 1 kW pre-mixed flame (IEC 60332-1-2) EN 61034-2, Measurement of smoke density of cables burning under defined conditions - Part 2: Test
37、 procedure and requirements (IEC 61034-2) PD CLC/TS 50576:2016CLC/TS 50576:2016 (E) 7 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 classification process defined in EN 13501, whereby the fire performance parameters obtained from the result
38、s of one test, or a set of tests, or from a process of extended application, are compared with limiting values for those parameters that are set as criteria for achieving a certain classification SOURCE: EN 15725 3.2 electric cable all power, control and communication cables, including optical fibre
39、 cables and hybrid cables which are a combination of two or more of these cable types SOURCE: EN 50575 3.3 power cable assembly comprising one or more insulated conductor(s), together with any coverings and protective layers, used for the transmission or supply of electrical energy SOURCE: EN 50575
40、3.4 control cable assembly comprising insulated conductors, together with any coverings and protective layers, used for the transmission of control, measuring and indication signals in electric installations SOURCE: EN 50575 3.5 communication cable assembly of suitably insulated coaxial conductors o
41、r twisted pairs of insulated conductors fabricated to meet transmission, mechanical and environmental requirements, and sufficient to allow conveyance of information between two points with the minimum of radiation SOURCE: EN 50575 3.6 optical fibre cable assembly comprising one or more optical fibr
42、es or fibre bundles inside a common covering designed to protect them against mechanical stresses and other environmental influences while retaining the transmission quality of the fibres Note 1 to entry: May also contain metallic conductors. SOURCE: IEV 731-04-01 3.7 product family group of product
43、s produced by one manufacturer for which the test results for one or more characteristics from one product within the family are considered to be representative for that same characteristic for all other products within this family SOURCE: EN 50575 PD CLC/TS 50576:2016CLC/TS 50576:2016 (E) 8 3.8 ext
44、ended application of test results EXAP outcome of a process (involving the application of defined rules that may incorporate calculation procedures) that attributes, for a cable family, a test result on the basis of one or more test results to the same test standard 3.9 heat release rate HRR thermal
45、 energy released per unit time by an item during combustion under specified conditions SOURCE: EN 50399 3.10 total heat release THR integrated value of the heat release rate over a defined period SOURCE: EN 50399 3.11 smoke production rate SPR smoke production per unit time SOURCE: EN 50399 3.12 tot
46、al smoke production TSP integrated value of the smoke production rate over a defined period SOURCE: EN 50399 3.13 flame spread FS propagation of a flame front SOURCE: EN 50399 3.14 fire growth rate index FIGRA highest value of the quotient between HRR and time SOURCE: EN 50399 PD CLC/TS 50576:2016CL
47、C/TS 50576:2016 (E) 9 4 Extended application of test results (EXAP) 4.1 Product families for EXAP 4.1.1 General An EXAP is only possible when cables belong to a defined family. The full constructional and material details for the family shall be submitted to the certification body prior to the EXAP
48、being applied. A change to the colour of design elements (for instance insulation and/or sheath) or to the marking on insulation and/or sheath does not constitute a different cable family. 4.1.2 Product families for power cables For the application of these EXAP rules and procedures, a cable family
49、shall be defined as follows: A family of cables is a specific range of products of the same general construction (design elements) and voltage rating. A change to the conductor construction (rigid or flexible) or form (circular or shaped) shall constitute a different family. EN 60228 Class 1 and Class 2 are rigid conductors and Class 5 and Class 6 are flexible conductors. An armour or concentric layer shall not be considered solely as a conductor in determining a product family. An armoured or
