BS EN 60811-202:2012 BSI Standards Publication Electric and optical fibre cables — Test methods for non-metallic materials Part 202: General tests — Measurement of thickness of non-metallic sheath BRITISH STANDARD BS EN 60811-202:2012 National foreword This British Standard is the UK implementation of EN 60811-202:2012 It is identical to IEC 60811-202:2012 In the UK, the relationship between the supersessions of BS EN 60811 series can be summarized as follows BS EN 60811-100 together with -201, -202, -203, -501 -301, -302, -411, -601, -602, -603, -604 -401, -412 -402, -502, -503, -606 -403, -404, -507 -405, -409 -406, -511, -605, -607 -407, -408, -410, -510, -512, -513 -504, -505, -506 -508, -509 Supersedes BS EN 60811-1-1:1995 BS EN 60811-5-1:2000 BS EN 60811-1-2:1995 BS EN 60811-1-3:1995 BS EN 60811-2-1:1998 BS EN 60811-3-2:1995 BS EN 60811-4-1:2004 BS EN 60811-4-2:2004 BS EN 60811-1-4:1995 BS EN 60811-3-1:1995 Superseded standards are withdrawn The UK participation in its preparation was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/17, Electric Cables - Low voltage A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2012 Published by BSI Standards Limited 2012 ISBN 978 580 65305 ICS 29.035.01; 29.060.20 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2012 Amendments issued since publication Amd No Date Text affected EUROPEAN STANDARD EN 60811-202 NORME EUROPÉENNE June 2012 EUROPÄISCHE NORM ICS 29.035.01; 29.060.20 Supersedes EN 60811-1-1:1995 (partially) + A1:2001 (partially) English version Electric and optical fibre cables Test methods for non-metallic materials Part 202: General tests Measurement of thickness of non-metallic sheath (IEC 60811-202:2012) Câbles électriques et fibres optiques Méthodes d'essai pour les matériaux nonmétalliques Partie 202: Essais généraux Mesure de l'épaisseur des gaines nonmétalliques (CEI 60811-202:2012) Kabel, isolierte Leitungen und Glasfaserkabel Prüfverfahren für nichtmetallene Werkstoffe Teil 202: Allgemeine Prüfungen – Messung der Wanddicke von nichtmetallenen Mänteln (IEC 60811-202:2012) This European Standard was approved by CENELEC on 2012-04-16 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels © 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 60811-202:2012 E BS EN 60811-202:2012 EN 60811-202:2012 -2- Foreword The text of document 20/1281/FDIS, future edition of IEC 60811-202, prepared by IEC/TC 20 "Electric cables" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60811-202:2012 The following dates are fixed: • • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with the document have to be withdrawn (dop) 2013-01-16 (dow) 2015-04-16 This document supersedes 8.2 of EN 60811-1-1:1995 + A1:2001 (partially) Full details of the replacements are shown in Annex A of EN 60811-100:2012 There are no technical changes with respect to EN 60811-1-1:1995 + A1:2001, but see the Foreword to EN 60811-100:2012 This standard is to be read in conjunction with EN 60811-100 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC) Endorsement notice The text of the International Standard IEC 60811-202:2012 was approved by CENELEC as a European Standard without any modification -3- BS EN 60811-202:2012 EN 60811-202:2012 Annex ZA (normative) Normative references to international publications with their corresponding European publications 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 undated references, the latest edition of the referenced document (including any amendments) applies NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies Publication Year Title EN/HD Year IEC 60811-100 2012 Electric and optical fibre cables - Test methods for non-metallic materials Part 100: General EN 60811-100 2012 –2– BS EN 60811-202:2012 60811-202 IEC:2012 CONTENTS INTRODUCTION Scope Normative references Terms and definitions Test method 4.1 4.2 4.3 General Measuring equipment Sample and test piece preparation 4.3.1 Sheaths applied over longitudinally regular surfaces 4.3.2 Sheaths applied over longitudinally irregular surfaces 4.3.3 Sheath applied over corrugated metallic sheaths 4.4 Measuring procedure 4.5 Evaluation of the measurement results Test report Bibliography 12 Figure – Measurement of sheath thickness (circular inner profile) Figure – Measurement of sheath thickness (irregular circular inner profile) Figure – Measurement of sheath thickness (non-circular inner profile) 10 Figure – Measurement of sheath thickness (irregular outer surface) 10 Figure – Measurement of sheath thickness (twin sheathed flat cable) 11 Figure – Measurement of sheath thickness (flat cable with single cores) 11 BS EN 60811-202:2012 60811-202 IEC:2012 –5– INTRODUCTION The IEC 60811 series specifies the test methods to be used for testing non-metallic materials of all types of cables These test methods are intended to be referenced in standards for cable construction and for cable materials NOTE Non-metallic materials are typically used for insulating, sheathing, bedding, filling or taping within cables NOTE These test methods are accepted as basic and fundamental and have been developed and used over many years principally for the materials in all energy cables They have also been widely accepted and used for other cables, in particular optical fibre cables, communication and control cables and cables for ships and offshore applications –6– BS EN 60811-202:2012 60811-202 IEC:2012 ELECTRIC AND OPTICAL FIBRE CABLES – TEST METHODS FOR NON-METALLIC MATERIALS – Part 202: General tests – Measurement of thickness of non-metallic sheath Scope This Part 202 of IEC 60811 gives the methods for measuring thicknesses of non-metallic sheath which apply to the most common types of sheathing compounds (cross-linked, PVC, PE, PP, etc.) 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 undated references, the latest edition of the referenced document (including any amendments) applies IEC 60811-100:2012, Electric and optical fibre cables – Test methods for non-metallic materials - Part 100: General Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60811-100 apply 4.1 Test method General This part of IEC 60811 shall be used in conjunction with IEC 60811-100 Unless otherwise specified, tests shall be carried out at room temperature The measurement of sheath thickness may be required as an individual test, or as a step in the procedure for carrying out other tests, such as the measurement of mechanical properties The test method applies to the measurement of all sheaths for which thickness limits are specified, for example separation sheaths, as well as external sheaths In each case, the method of selecting samples shall be in accordance with the relevant cable standard 4.2 Measuring equipment A measuring microscope or a profile projector of at least 10 x magnification or an optical digital image analyser shall be used All types of equipment shall allow a reading of 0,01 mm and an estimated reading to three decimal places when measuring insulation with a specified thickness less than 0,5 mm For sheaths applied over longitudinally irregular surfaces such as corrugated metallic sheaths, a micrometer having a ball nose radius of mm and allowing a reading of 0,01 mm BS EN 60811-202:2012 60811-202 IEC:2012 –7– may be used This method is suitable only for corrugations having a radius greater than mm In case of doubt, the measuring microscope shall be taken as the reference method 4.3 Sample and test piece preparation 4.3.1 Sheaths applied over longitudinally regular surfaces After all materials, if any, inside and outside the sheath have been removed, each test piece shall be prepared by cutting a thin slice along a plane perpendicular to the longitudinal axis of the cable, using a suitable device If the sheath carries an indenting marking, thus giving rise to a local reduction in thickness, the test piece shall include such marking 4.3.2 Sheaths applied over longitudinally irregular surfaces Cut a short piece of sheath, perpendicular to the longitudinal axis of the cable, including at least one complete pitch or helix formed by the underlying tape If using a ball nose micrometer, the sample may be left whole If using a microscope or profile projector, the test piece shall be prepared by cutting six thin longitudinal slices (parallel to the cable axis), using a suitable device 4.3.3 Sheath applied over corrugated metallic sheaths A sample of complete cable shall be taken, 500 mm from the end of the drum and of sufficient length to include two peaks and two troughs A reference line shall be drawn on the outer surface of the over sheath, parallel to the axis of the cable The position of the minimum thickness shall be determined on an annular ring taken from the end of the sample A strip shall then be cut at this minimum point parallel to the axis of the cable (the previously drawn reference line shall be used to locate this position) 4.4 Measuring procedure The test piece shall be placed under the measuring equipment with the plane of the cut perpendicular to the optical axis a) When the inner profile of the test piece is of circular form, six measurements shall be made radially, each approximately 60°, as shown in Figure b) If the substantially circular inner surface is not regular or smooth, six measurements shall be made radially at the positions where the sheath is thinnest, as shown in Figure c) When the inner profile exhibits deep grooves caused by the cores, radial measurements shall be taken at the bottom of each groove, as shown in Figure When the number of grooves exceeds six, item b) applies d) In order to eliminate the influence of any irregularities on the outer surface, which may be due to the presence of a proofed tape or a ribbed sheath finish, the measurements shall be made as shown in Figure e) In the case of sheathed flat cables, measurements shall be taken on lines approximately parallel to the minor axis and on the major axis of the cross-section, at the position of each core, one of the measurements being, however, made at the thinnest place, as shown in Figure f) For sheathed flat cables composed of up to and including six single cores, measurement shall be taken as shown in Figure 6: – on both rounded off sides, along the major axis of the cross-section; –8– – BS EN 60811-202:2012 60811-202 IEC:2012 on both flat sides, on the first and last core, and at the thinnest place (plus opposite sheath thickness), if this does not coincide with any of the other measurements For cables composed of more than six cores, the above applies but measurements shall also be taken on the middle core, or on one of the two middle cores in the case of an even number of cores g) For cables with a sheath applied over longitudinally irregular surfaces, the piece of sheath prepared in accordance with 4.3.2 shall be measured using a ball nose micrometer, to determine the minimum thickness Alternatively, the six thin longitudinal slices prepared in accordance with 4.3.2 shall be measured optically to determine the minimum thickness h) For cables with a sheath applied over a corrugated metal sheath, four measurements shall be taken on the longitudinal strip prepared in accordance with 4.3.3 at, respectively, two peaks and two troughs of the corrugation In all cases, the thickness at the position of the indented marking shall comply with the minimum requirement specified in the relevant standard If the sheath carries an indented marking, this shall not be included in the measurements made for the calculation of mean thickness The readings shall be made in millimetres to two decimal places 4.5 Evaluation of the measurement results The results shall be evaluated as specified in the test requirements of the relevant cable standard Test report The test report shall be in accordance with that given in IEC 60811-100 BS EN 60811-202:2012 60811-202 IEC:2012 IEC 245/12 Key tm –9– minimum thickness Figure – Measurement of sheath thickness (circular inner profile) IEC 251/12 Key tm minimum thickness Figure – Measurement of sheath thickness (irregular circular inner profile) – 10 – BS EN 60811-202:2012 60811-202 IEC:2012 IEC 252/12 Key tm minimum thickness Figure – Measurement of sheath thickness (non-circular inner profile) IEC 253/12 Key tm minimum thickness Figure – Measurement of sheath thickness (irregular outer surface) BS EN 60811-202:2012 60811-202 IEC:2012 – 11 – IEC 254/12 Key tm minimum thickness Figure – Measurement of sheath thickness (twin sheathed flat cable) IEC 255/12 Key tm minimum thickness Figure – Measurement of sheath thickness (flat cable with single cores) – 12 – BS EN 60811-202:2012 60811-202 IEC:2012 Bibliography IEC 60811-1-1:1993, Common test methods for insulating and sheathing materials of electric cables – Part 1: Methods for general application – Section 1: Measurement of thickness and overall dimensions – Tests for determining the mechanical properties (withdrawn) This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions Our British Standards and other publications are updated by amendment or revision The knowledge embodied in our standards has been carefully assembled in a dependable format and refined through our open consultation process Organizations of all sizes and across all sectors choose standards to help them achieve their goals Information on standards We can provide you with the knowledge that your organization needs to succeed Find out more about British Standards by visiting our website at bsigroup.com/standards or contacting our Customer Services team or Knowledge Centre Buying standards You can buy and download PDF versions of BSI publications, including British and adopted European and international standards, through our website at bsigroup.com/shop, where hard copies can also be purchased If you need international and foreign standards from other Standards Development Organizations, hard copies can be ordered from our Customer Services team Subscriptions Our range of subscription services are designed to make using standards easier for you For further information on our subscription products go to bsigroup.com/subscriptions With British Standards Online (BSOL) you’ll have instant access to over 55,000 British and adopted European and international standards from your desktop It’s available 24/7 and is refreshed daily so you’ll always be up to date You can keep in touch with standards developments and receive substantial discounts on the purchase price of standards, both in single copy and subscription format, by becoming a BSI Subscribing Member PLUS is an updating service exclusive to BSI Subscribing Members You will automatically receive the latest hard copy of your standards when they’re revised or replaced To find out more about becoming a BSI Subscribing Member and the benefits of membership, please visit bsigroup.com/shop With a Multi-User Network Licence (MUNL) you are able to host standards publications on your intranet Licences can cover as few or as many users as you wish With updates supplied as soon as they’re available, you can be sure your documentation is current For further information, email bsmusales@bsigroup.com BSI Group Headquarters 389 Chiswick High Road London W4 4AL UK We continually improve the quality of our products and services to benefit your business If you find an inaccuracy or ambiguity within a British Standard or other BSI publication please inform the Knowledge Centre Copyright All the data, software and documentation set out in all British Standards and other BSI publications are the property of and copyrighted by BSI, or some person or entity that owns copyright in the information used (such as the international standardization bodies) and has formally licensed such information to BSI for commercial publication and use 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 Details and advice can be obtained from the Copyright & Licensing Department Useful Contacts: Customer Services Tel: +44 845 086 9001 Email (orders): orders@bsigroup.com Email (enquiries): cservices@bsigroup.com Subscriptions Tel: +44 845 086 9001 Email: subscriptions@bsigroup.com Knowledge Centre Tel: +44 20 8996 7004 Email: knowledgecentre@bsigroup.com Copyright & Licensing Tel: +44 20 8996 7070 Email: copyright@bsigroup.com