IEC 62491:2008

Industrial systems, installations and equipment and industrial products - Labelling of cables and cores

IEC 62491:2008 provides rules and guidelines for the labelling of cables and cores/conductors used in industrial installations, equipment and products, in order to maintain a clear relation between the technical documentation and the actual equipment and for other purposes. International Standard IEC 62491 has been prepared by IEC technical committee 3: Information structures, documentation and graphical symbols.

Systèmes industriels, installations et appareils et produits industriels - Etiquetage des câbles et des conducteurs isolés

La CEI 62491:2008 fournit les règles et lignes directrices d'étiquetage des câbles et des conducteurs isolés/conducteurs utilisés dans les installations, appareils et produits industriels, afin de conserver une relation claire entre la documentation technique et le matériel réel, ainsi qu'à d'autres fins. La Norme internationale CEI 62491 a été établie par le comité d'études 3 de la CEI: Structures d'informations, documentation et symboles graphiques.

General Information

• Status: Published
• Publication Date: 25-Mar-2008
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 01.110 - Technical product documentation
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: TC 3 - Documentation, graphical symbols and representations of technical information
• Drafting Committee: PT 35 - TC 3/PT 35
• Current Stage: PPUB - Publication issued
• Start Date: 30-Jun-2008
• Completion Date: 26-Mar-2008

Standards Content (Sample)

IEC 62491
Edition 1.0 2008-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial systems, installations and equipment and industrial products –
Labelling of cables and cores
Systèmes industriels, installations et appareils et produits industriels –
Etiquetage des câbles et des conducteurs isolés

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IEC 62491
Edition 1.0 2008-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial systems, installations and equipment and industrial products –
Labelling of cables and cores
Systèmes industriels, installations et appareils et produits industriels –
Etiquetage des câbles et des conducteurs isolés

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 01.110; 29.020.20 ISBN 2-8318-9663-0

– 2 – 62491 © IEC:2008
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 Rules.9
4.1 General requirements.9
4.2 Use of designated cable cores.10
4.3 Use of additional labelling .10
5 Identification labelling.11
5.1 General .11
6 Connection labelling .14
6.1 General .14
6.2 Local-end connection labelling .14
6.3 Remote-end connection labelling.15
6.4 Both-end connection labelling.16
7 Signal labelling.17
7.1 General .17
7.2 Labelling by signal designation.17
7.3 Labelling of cables for certain designated conductors.18
8 Composite labelling .19
9 Arrangement of additional labelling.20
9.1 General .20
9.2 Relative positions of the labelling .20
9.3 Characters to be used .20
10 Correspondence between labelling and documentation.21
11 Conformance to this standard.21
Annex A (informative) Examples of labelling .22
Bibliography.30

Figure 1 – Example of identification labelling of a single core cable (W23) and of a
multi-core cable (W24) in which also the different cores are labelled .12
Figure 2 – Example of identification labelling of cores where the initial part of the
reference designation has been partly omitted .13
Figure 3 – Example of local-end connection labelling.14
Figure 4 – Example of remote-end connection labelling for a connection inside a unit.15
Figure 5 – Example of remote-end connection labelling for a cable between different
units .16
Figure 6 – Example of both-end connection labelling .17
Figure 7 – Example of local-end connection labelling combined with signal labelling.19
Figure 8 – Example of composite labelling in which both-end connection labelling is
used together with identification labelling and signal labelling.19
Figure 9 – Examples of arrangements of labelling on cores or cables. .20
Figure A.1 – Circuit diagram used as a basis for the examples .22

62491 © IEC:2008 – 3 –
Figure A.2 – Example of identification labelling .23
Figure A.3 – Example of local-end labelling .24
Figure A.4 – Example of both-end connection labelling .25
Figure A.5 – Example of local end connection labelling with additional information .26
Figure A.6 – Example of signal labelling .27
Figure A.7 – Example of composite labelling.28
Figure A.8 – Example where use is made of the cable colours .29

Table 1 – Example of connection table in which the cable cores are identified by
means of codes for their colour.10
Table 2 – Connection table corresponding to Figure 1 with labelling .12
Table 3 – Connection table corresponding to Figure 2 with labelling .13
Table 4 – Marking of certain designated conductors.18
Table 5 – Methods of labelling defined in this standard .21

– 4 – 62491 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL SYSTEMS, INSTALLATIONS
AND EQUIPMENT AND INDUSTRIAL PRODUCTS –
LABELLING OF CABLES AND CORES
FOREWORD
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