IEC 60092-352:2005
(Main)Electrical installations in ships - Part 352: Choice and installation of electrical cables
Electrical installations in ships - Part 352: Choice and installation of electrical cables
This standard provides the basic requirements for the choice and installation of cables intended for fixed electrical systems on board ships at voltages (U) up to and including 15 kV. The reference to fixed systems includes those that are subjected to vibration (due to the movement of the ship) or movement (due to motion of the ship) and not to those that are intended for frequent flexing. Cables suitable for frequent or continual flexing use are detailed in other IEC specifications e.g. IEC 60227 and IEC 60245, and their uses on board ship is restricted to those situations which do not directly involve exposure to a marine environment e.g. portable tools or domestic appliances.
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INTERNATIONAL IEC
STANDARD 60092-352
Third edition
2005-09
Electrical installations in ships –
Part 352:
Choice and installation of electrical cables
Reference number
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As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
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INTERNATIONAL IEC
STANDARD 60092-352
Third edition
2005-09
Electrical installations in ships –
Part 352:
Choice and installation of electrical cables
IEC 2005 Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale X
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
– 2 – 60092-352 IEC:2005(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.8
2 Normative references .8
3 Types, construction, installation and operating conditions of cables .9
3.1 Types of cables .9
3.2 Voltage rating.10
3.3 Cross-sectional areas of conductors and current carrying capacities .11
3.4 Voltage drop.15
3.5 Estimation of lighting loads.15
3.6 Parallel connection of cables.15
3.7 Separation of circuits.16
3.8 Short circuit capacity (withstand capability). .16
3.9 Conductor .16
3.10 Insulation material.16
3.11 Screen, core screen or shield .16
3.12 Sheathing material .16
3.13 Metallic braid or armour.17
3.14 Fire performance.17
3.15 Cable runs.18
3.16 Cable installation methods in relation to electromagnetic interference .19
3.17 Mechanical protection .19
3.18 Bending radius .20
3.19 Supports and fixing .21
3.20 Cables penetrating bulkheads and decks.21
3.21 Installation in metallic pipes or conduits or trunking.22
3.22 Installation in non-metallic pipes, conduits, trunking, ducts or capping and
casing .22
3.23 Installation in battery compartments .23
3.24 Installation in refrigeration spaces .23
3.25 Tensile stress.23
3.26 Special precautions for single core cables for a.c. wiring.23
3.27 Cable ends.24
3.28 Joints and tappings (branch circuits) .25
3.29 Joint boxes.25
Annex A (informative) Tabulated current carrying capacities – Defined installations.29
Annex B (informative) Tabulated current carrying capacities – General installations .40
Annex C (informative) Fire stops.47
Annex D (informative) Cable splicing .48
Bibliography.49
60092-352 IEC:2005(E) – 3 –
Figure 1 – Correction factors for half hour and one hour service .26
Figure 2 – Time constant of cables .27
Figure 3 – Correction factor for intermittent service.28
Table 1 – Choice of cables for a.c. systems .11
a
Table 2 – Sizes of earth continuity conductors and equipment earthing connections .12
Table 3 – Correction factor for various ambient air temperatures .14
Table 4 – Bending Radii for cables rated up to 1,8/3 kV.20
Table 4 A – Bending Radii for cables rated at 3,6/6,0(7,2) kV and above .20
Table A.1 – Current carrying capacities in amperes .32
Table A.2 – Current carrying capacities in amperes .33
Table A.3 – Current carrying capacities in amperes .34
Table A.4 – Current carrying capacities in amperes .35
Table A.5 – Current carrying capacities in amperes .36
Table A.6 – Correction factors for groups of more than one circuit or of more than one
multi-core cable to be used with current carrying capacities of Tables A.1 to A.5 .37
Table A.7 – Correction factors for group of more than one multi-core cable to be
applied to reference ratings for multi-core cables in free air – Method of installation E
in Tables A.1 to A.5 .38
Table A.8 – Correction factors for groups of more than one circuit of single-core cables
to be applied to reference rating for one circuit of single-core cables in free air –
Method of installation F in Tables A.1 to A.5 .39
Table B.1 – Current carrying capacities in continuous service at maximum rated
conductor temperature of 60 °C .42
Table B.2 – Current carrying capacities in continuous service at maximum rated
conductor temperature of 70 °C .43
Table B.3 – Current carrying capacities in continuous service at maximum rated
conductor temperature of 85 °C .44
Table B.4 – Current carrying capacities in continuous service at maximum rated
conductor temperature of 90 °C .45
Table B.5 – Current carrying capacities in continuous service at maximum rated
conductor temperature of 95 °C .46
– 4 – 60092-352 IEC:2005(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
ELECTRICAL INSTALLATIONS IN SHIPS –
Part 352: Choice and installation of electrical cables
FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60092-352 has been prepared by subcommittee 18A: Cables and
cable installations, of IEC technical committee TC 18: Electrical installations of ships and of
mobile and fixed offshore units.
This third edition cancels and replaces the second edition published in 1997, of which it
cons
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