BRITISH STANDARD BS EN 50290 2 26 2002 Communication cables — Part 2 26 Common design rules and construction — Halogen free flame retardant insulation compounds The European Standard EN 50290 2 26 200[.]
BRITISH STANDARD Communication cables — Part 2-26:Common design rules and construction — Halogen free flame retardant insulation compounds The European Standard EN 50290-2-26:2002 has the status of a British Standard ICS 29.035.20; 33.120 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 50290-2-26: 2002 BS EN 50290-2-26:2002 National foreword This British Standard is the official English language version of EN 50290-2-26:2002 It supersedes BS 7878-6:1997 which is withdrawn The UK participation in its preparation was entrusted by Technical Committee EPL/46, Cables, wires and waveguides, RF connectors and accessories for communication and signalling, to Subcommittee EPL/46/1, Communication cables, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK A list of organizations represented on this subcommittee can be obtained on request to its secretary Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 15 April 2002 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages to 6, an inside back cover and a back cover The BSI copyright date displayed in this document indicates when the document was last issued Amendments issued since publication Amd No © BSI 15 April 2002 ISBN 580 39476 X Date Comments EUROPEAN STANDARD EN 50290-2-26 NORME EUROPÉENNE EUROPÄISCHE NORM January 2002 ICS 29.035.20; 33.120.10 Supersedes HD 624.6 S1:1995 English version Communication cables Part 2-26: Common design rules and construction – Halogen free flame retardant insulation compounds Câbles de communication Partie 2-26: Règles de conception communes et construction – Mélanges pour enveloppes isolantes sans halogène et avec propagation retardée de flamme Kommunikationskabel Teil 2-26: Gemeinsame Regeln für Entwicklung und Konstruktion Halogenfreie flammwidrige Isoliermischungen This European Standard was approved by CENELEC on 2001-11-01 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels © 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50290-2-26:2002 E EN 50290-2-26:2002 -2Foreword This European Standard was prepared by a joint working group of the Technical Committees CENELEC TC 46X, Communication cables, and CENELEC TC 86A, Optical fibres and optical fibre cables The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50290-2-26 on 2001-11-01 This European Standard supersedes HD 624.6 S1:1995 The following dates were fixed: – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-08-01 – latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2004-08-01 Annexes designated "normative" are part of the body of the standard In this standard, annexe A is normative This European Standard has been prepared under the European Mandate M/212 given to CENELEC by the European Commission and the European Free Trade Association -31 EN 50290-2-26:2002 Scope This Part 2-26 of EN 50290 gives specific requirements for halogen free flame retardant insulation compounds used in communication cables It is to be read in conjunction with Part 2-20 of EN 50290 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies (including amendments) EN 60811-1-1:1995 Insulating and sheathing materials of electric and optical cables - Common test methods Part 1-1: General application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties (IEC 60811-1-1:1993) EN 60811-1-2:1995 Insulating and sheathing materials of electric cables - Common test methods Part 1-2: General application Thermal ageing methods (IEC 60811-1-2:1985 + corr May 1986 + A1:1989) EN 60811-1-3:1995 Insulating and sheathing materials of electric and optical cables - Common test methods Part 1-3: General application - Methods for determining the density - Water absorption tests - Shrinkage test (IEC 60811-1-3:1993) EN 60811-1-4:1995 Insulating and sheathing materials of electric and optical cables - Common test methods Part 1-4: General application - Tests at low temperature (IEC 60811-1-4:1985 + corr May 1986 + A1:1993) EN 60811-2-1:1998 Insulating and sheathing materials of electric and optical cables - Common test methods Part 2-1: Methods specific to elastomeric compounds - Ozone resistance, hot set and mineral oil immersion tests (IEC 60811-2-1:1998) EN 60811-3-1:1995 Insulating and sheathing materials of electric and optical cables - Common test methods Part 3-1: Methods specific to PVC compounds - Pressure test at high temperature - Tests for resistance to cracking (IEC 60811-3-1:1985 + corr May 1986) HD 405.3 S1:1993 Tests on electric cables under fire conditions Part 3: Tests on bunched wires or cables ( IEC 60332-3:1992) IEC 60250:1969 Recommended methods for the determination of the permittivity and dielectric dissipation factor of electrical insulating materials at power, audio and radio frequencies including metre wavelengths IEC 60754-2:1991 + A1:1997 Test on gases evolved during combustion of materials from cables Determination of degree of acidity of gases by measuring pH and conductivity Requirements In case of specific applications, additional performances could be needed Relevant test methods and requirements shall be included in the detail specification of the cables EN 50290-2-26:2002 -4Table - Halogen free flame retardant insulation compounds Characteristics Maximum rated temperature at cable for which the compound can be used Mechanical characteristics 2.1 In state of delivery Tensile strength 2.11 - median, 2.12 2.2 Test method Grades Cross linked insulation Thermoplastic insulation °C 90 70 MPa 10 % 125 125 °C h 135 ± x 24 100 ± x 24 % ± 30 ± 30 % % ± 30 100 1) ± 40 EN 60811-1-1 9.1 Elongation at break - median, After ageing Unit EN 60811-1-2 8.1 Ageing conditions - temperature - duration 2.21 Tensile strength - variation, max 2.22 Elongation at break - median, - variation, max Heat shock Test conditions - temperature - duration EN 60811-3-1 Not applicable 9.1 °C h - Result to be obtained No crack Behaviour at low temperature Bending at low temperature Test conditions - temperature Result to be obtained Shrinkage EN 60811-1-4 8.1 Result to be obtained, max Pressure at high temperature Test conditions - temperature - duration (for all values of cable diameter) Result to be obtained - depth of indentation median, max 1) Provisional value - 15 ± - 15 ± No crack No crack mm °C h 200 100 200 100 % Not applicable - 80 ± °C EN 60811-1-3 clause 10 Test conditions - sample length - temperature - duration 130 ± EN 60811-3-1 8.1 °C h % - 50 -5- EN 50290-2-26:2002 Table (continued) Characteristics Oxygen Index (see note 1) Corrosivity Smoke opacity (see note 2) 10 Toxicity 11 Volume resistivity, - at maximum rated temperature at cable Test method HD 405.3 Unit Grades Cross linked insulation Thermoplastic insulation To meet To meet 108 108 (provisional value) 1010 (provisional value) 1010 (provisional value) (provisional value) 5 % IEC 60754-2 Under consideration Appended W.m - at 20 ° C Test conditions - sample length, - immersion duration m h 12 Dielectric constant (see note 3) IEC 60250 Typical value (Under consideration) 13 Dissipation factor (see note 3) IEC 60250 Typical value (Under consideration) 14 Hot set test Test conditions - temperature - duration - load EN 60811-2-1 Not applicable 14.1 Result to be obtained - elongation, max 14.2 - permanent set, max °C N/cm2 200 ± 15 20 % % 175 25 NOTE Oxygen index measurement has been found to be a suitable indicator to guide selection and monitoring of materials used in cables which have to meet the fire performance tests specified in the relevant cable specification NOTE For selection of materials used in cables, IEC 60695-6 may be considered NOTE When required the dielectric constant and dissipation factor, shall be measured at MHz, and at other required values Typical values are under consideration EN 50290-2-26:2002 -6Annex A (normative) Volume resistivity This test shall be made on insulated conductor sample The sample shall be immersed in water previously heated to the specified temperature, a length of about 0,25 m at each end of the sample being kept above the water A D.C voltage of between 80 V and 500 V shall be then applied between the conductor and the water The insulation resistance shall be measured after application of the voltage - The volume resistivity shall be calculated from the measured insulation resistance by the following formula: r= 2plR D loge d where r = R= l = D= d= volume resistivity, in W meters measured insulation resistance, in W length of the sample, in meters outer diameter of the insulation, in mm inner diameter of the insulation, in mm blank BS EN 50290-2-26: 2002 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Tel: +44 (0)20 8996 9000 Fax: +44 (0)20 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001 Email: orders@bsi-global.com Standards are also available from the BSI website at http://www.bsi-global.com In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact the Information Centre Tel: +44 (0)20 8996 7111 Fax: +44 (0)20 8996 7048 Email: info@bsi-global.com Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact Membership Administration Tel: +44 (0)20 8996 7002 Fax: +44 (0)20 8996 7001 Email: membership@bsi-global.com Information regarding online access to British Standards via British Standards Online can be found at http://www.bsi-global.com/bsonline Further information about BSI is available on the BSI website at http://www.bsi-global.com Copyright Copyright subsists in all BSI publications BSI also holds the copyright, in the UK, of the publications of the international standardization bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI BSI 389 Chiswick High Road London W4 4AL 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 other purpose than implementation then the prior written permission of BSI must be obtained Details and advice can be obtained from the Copyright & Licensing Manager Tel: +44 (0)20 8996 7070 Fax: +44 (0)20 8996 7553 Email: copyright@bsi-global.com