IEC_61892-4-2007.pdf

INTERNATIONAL STANDARD IEC61892-4 First edition2007-06 Mobile and fixed offshore units Electrical installations Part 4:Cables Reference number IEC 61892-4:2007(E)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,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 from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch Web:www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.?Catalogue of IEC publications:www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn and replaced publications.?IEC Just Published:www.iec.ch/online_news/justpub Stay up to date on all new IEC publications.Just Published details twice a month all new publications released.Available on-line and also by email.?Customer Service Centre:www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance,please visit the Customer Service Centre FAQ or contact us:Email:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 INTERNATIONAL STANDARD IEC61892-4 First edition2007-06 Mobile and fixed offshore units Electrical installations Part 4:Cables X For price,see current cataloguePRICE CODE Commission Electrotechnique InternationaleInternational Electrotechnical Commission 2 61892-4 IEC:2007(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.8 4 Types,installation and operating conditions of cables.10 4.1 Types of cables.10 4.2 Voltage rating.10 4.2.1 Power frequency cables.10 4.2.2 Control and instrumentation cables.11 4.3 Cross-sectional areas of conductors and current-carrying capacities.11 4.3.1 Cross-sectional areas of conductors.11 4.3.2 Current-carrying capacities.13 4.3.3 Current-carrying capacities for continuous service.13 4.3.4 Correction factors for different ambient air temperatures.17 4.3.5 Correction factors for short time duty.18 4.3.6 Correction factors for cable grouping.21 4.4 Voltage drop.22 4.5 Estimation of lighting loads.22 4.6 Parallel connection of cables.22 4.7 Separation of circuits.22 4.8 Short circuit capacity(withstand capability).22 4.9 Conductor.22 4.10 Insulation material.23 4.11 Screen,core screen or shield.23 4.12 Sheathing material.23 4.13 Metallic braid armour.23 4.14 Fire performance.23 4.15 Bending radius.24 Annex A(informative)Tabulated current-carrying capacities Defined installations.26 Annex B(Informative)Fire stops.40 Annex C(Informative)Jet fire test for hydrocarbon(HCF)fire resistant cables.41 Annex D(Informative)Drilling fluid test procedure and requirements.42 Bibliography.44 Table 1 Choice of cables for a.c.systems.11 Table 2 Sizes of earth continuity conductors and equipment earthing connections.13 Table 3 Coefficient related to maximum permissible temperature of the conductor.14 Table 4 Current-carrying capacities in continuous service at maximum rated conductor temperature of 70 C(ambient air temperature 45 C).15 61892-4 IEC:2007(E)3 Table 5 Current-carrying capacities in continuous service at maximum rated conductor temperature of 90 C(ambient air temperature 45 C).16 Table 6 Current-carrying capacities in continuous service at maximum rated conductor temperature of 95 C(ambient air temperature 45 C).17 Table 7 Correction factor for various ambient air temperatures (reference ambient temperature of 45 C).18 Table 8 Correction factor for various ambient air temperatures (reference ambient temperature of 30 C).18 Table 9 Bending radii for cables rated up to 1,8/3 kV.25 Table 10 Bending radii for cables rated at 3,6/6,0(7,2)kV and above.25 Table A.1 Current-carrying capacities in amperes Copper conductor temperature 60 C and reference ambient air temperature 45 C.29 Table A.2 Current-carrying capacities in amperes Copper conductor temperature 70 C and reference ambient air temperature 45 C.30 Table A.3 Current-carrying capacities in amperes Copper conductor temperature 85 C and reference ambient air temperature 45 C.31 Table A.4 Current-carrying capacities in amperes Copper conductor tempera