IEC 61892-6:1999

INTERNATIONAL
IEC
STANDARD
61892-6
First edition
1999-02
Mobile and fixed offshore units –
Electrical installations –
Part 6:
Installation
Unités mobiles et fixes en mer –
Installations électriques –
Partie 6:
Installation
Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are

available. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the
base publication, the base publication incorporating amendment 1 and the base

publication incorporating amendments 1 and 2.

Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken by
the technical committee which has prepared this publication, as well as the list of
publications issued, is to be found at the following IEC sources:
• IEC web site*
• Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International Electro-
technical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL
IEC
STANDARD
61892-6
First edition
1999-02
Mobile and fixed offshore units –
Electrical installations –
Part 6:
Installation
Unités mobiles et fixes en mer –
Installations électriques –
Partie 6:
Installation
 IEC 1999  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 Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
U
International Electrotechnical Commission
For price, see current catalogue

– 2 – 61892-6 © IEC:1999(E)
CONTENTS
Page
FOREWORD . 5

INTRODUCTION . 6

Clause
1 Scope. 7

2 Normative references. 7
3 Definitions. 8
4 Earthing and bonding. 9
4.1 General. 9
4.2 Earthing of exposed conductive parts . 10
4.3 Equipotential bonding. 10
4.4 Bonding connections. 11
4.5 Connections to the unit structure . 11
4.6 Protection against galvanic corrosion . 11
4.7 Metal coverings and mechanical protection of cables. 11
4.8 Cable racks and cable tray . 12
4.9 Ductings of heating, ventilation, air-condition (HVAC) and vessels . 12
5 Cables and wiring . 13
5.1 General. 13
5.2 Installation. 13
6 Generators and motors. 13
6.1 General. 13
6.2 Installation . 13
7 Transformers. 14
7.1 General. 14
7.2 Installation and location. 14

7.3 Isolation of windings. 14
8 Switchgear and controlgear assemblies . 15
8.1 General. 15
8.2 Location. 15
8.3 Insulating mats. 15
8.4 Passageways in front of switchgear and controlgear assemblies. 15
8.5 Space at the rear and passsageways . 15
8.6 Positions of section and distribution boards . 16
9 Semiconductor convertors. 16

61892-6 © IEC:1999(E) – 3 –
Clause Page
10 Secondary cells and batteries . 16

10.1 General. 16

10.2 Location. 16

10.3 Access. 17

10.4 Electrical installation in secondary battery compartments. 17

10.5 Protection against corrosion . 17

10.6 Fixing and supports. 18

10.7 Protection of circuits from secondary batteries. 18

11 Luminaires. 18
11.1 General. 18
11.2 Degree of protection and safety requirements. 18
11.3 Discharge lighting of voltage above 250 V . 18
11.4 Emergency lighting. 19
12 Heating and cooking appliances. 19
12.1 Guarding of combustible materials . 19
12.2 Position of controlgear and switchgear . 19
12.3 Mounting of space-heating appliances . 19
13 Trace and surface heating . 19
13.1 General. 19
13.2 Trace heating cables. 19
13.3 Marking. 20
13.4 Protection. 20
13.5 Mechanical protection. 20
13.6 Junction boxes. 20
14 Control and instrumentation. 20
14.1 General. 20
14.2 Layout. 20
14.3 Compatibility. 20
14.4 Labelling. 20

14.5 Labels. 21
14.6 Display colours. 21
14.7 Illumination. 21
14.8 Protection against fluid leakage. 21
14.9 Isolation of control rooms . 21
14.10 Protection from condensation . 21
14.11 Protection during installation period. 22
14.12 External cables and wiring. 22
14.13 Interference . 22
14.14 Sensors. 22
14.15 Measurements and indications . 22

– 4 – 61892-6 © IEC:1999(E)
Clause Page
14.16 Controls. 23

14.17 Alarm system. 23

15 Communication. 24

16 Lightning protection. 24

16.1 General. 24

16.2 Protection against primary structural damage . 24

16.3 Air terminals. 25

16.4 Down conductors. 25
16.5 Protection against secondary damage . 25
17 Test of completed installation . 26
17.1 General. 26
17.2 Inspections and tests . 26
17.3 Insulation-testing instruments. 26
17.4 Insulation resistance. 27
17.5 Generators. 27
17.6 Switchgear. 27
17.7 Lighting, heating and galley equipment . 28
17.8 Communication systems. 28
17.9 Emergency and safety systems . 28
17.10 Earthing. 28
17.11 Voltage drop. 28
17.12 Requirements of International Convention on Safety of Life at Sea (SOLAS) 28
18 Documentation. 28
18.1 General. 28
18.2 Equipment. 29
18.3 Testing. 29
18.4 Maintenance. 29

Annex A (informative) Bibliography . 30

61892-6 © IEC:1999(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

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MOBILE AND FIXED OFFSHORE UNITS –

ELECTRICAL INSTALLATIONS –
Part 6: Instal
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