IEC 62491-2008 PDF
Name in English:
St IEC 62491-2008
Name in Russian:
Ст IEC 62491-2008
Original standard IEC 62491-2008 in PDF full version. Additional info + preview on request
Full title and description
Industrial systems, installations and equipment and industrial products - Labelling of cables and cores. This International Electrotechnical Commission (IEC) standard provides rules and guidelines for the identification and labelling of cables and individual cores/conductors used in industrial installations, equipment and products to ensure a clear relationship between technical documentation and the physical wiring.
Abstract
IEC 62491:2008 defines methods for marking and labelling cables and cores to improve traceability, safety and maintainability in industrial electrical systems. The standard describes options such as use of coloured cables and designated cores, additional identification labels, connection labels and signal labels, while excluding detailed prescriptions of physical label design and manufacturer product-bound markings. It was prepared by IEC technical committee TC 3 (documentation and graphical symbols).
General information
- Status: Published — current international standard (1st edition).
- Publication date: 26 March 2008 (circulation/approval in March 2008).
- Publisher: International Electrotechnical Commission (IEC).
- ICS / categories: 01.110 (Technical product documentation); 29.020 (Electrical engineering in general).
- Edition / version: Edition 1.0 (2008).
- Number of pages: 60 pages.
Scope
IEC 62491:2008 provides rules and guidelines for the labelling of cables and cores/conductors used in industrial installations, equipment and products, to maintain a clear relation between technical documentation and the actual equipment. It describes the recognised labelling methods and when to use them, while excluding detailed physical design requirements for labels and manufacturer product-bound markings.
Key topics and requirements
- Methods for cable and core identification: use of colours and designated cores.
- Additional identification labelling techniques for cables and cores (sleeves, markers, printed labels).
- Connection labelling to preserve traceability between documentation and wired connections.
- Signal labelling for instrumentation and control conductors to support correct wiring and maintenance.
- Guidance on when to apply each labelling method and how to link labelling to technical documentation and wiring diagrams.
- Exclusions: physical label material/design specifications and mandatory manufacturer product markings are out of scope.
Typical use and users
Used by electrical and control engineers, panel builders, OEMs, installers, maintenance technicians, technical writers and documentation teams to standardise cable and conductor identification across industrial systems. Also used by standards committees and regulatory bodies when aligning national/adopted versions. Manufacturers consult the standard when providing product-bound information about cable conductors.
Related standards
EN 62491:2008 is the European adoption of IEC 62491 (CENELEC adoption). National adoptions and translations (for example NEK EN 62491:2008 and other national versions) exist. The standard is maintained by IEC TC 3 and is referenced alongside other documentation and wiring standards used for industrial equipment documentation and electrical installations.
Keywords
cable labelling, core identification, conductor marking, wire marking, industrial wiring, technical product documentation, wiring diagrams, traceability, IEC TC 3.
FAQ
Q: What is this standard?
A: IEC 62491:2008 is an IEC International Standard that gives rules and guidelines for labelling cables and cores/conductors used in industrial systems and products to ensure consistent identification and traceability.
Q: What does it cover?
A: It covers recognised labelling methods (colours, core designation, additional identification, connection and signal labelling) and guidance on their application and documentation linkage. It does not prescribe exact physical label materials or the product-bound marking applied by manufacturers.
Q: Who typically uses it?
A: Electrical/control engineers, OEMs, panel builders, installers, maintenance staff, and technical documentation authors — essentially anyone responsible for wiring, cable routing and documentation in industrial installations and equipment.
Q: Is it current or superseded?
A: The 2008 edition (Edition 1.0) remains the published international standard and is in force. As of early 2026 a second edition (IEC 62491 ED2 / related prEN IEC work) is in development, so a revised edition is expected; users should check national or IEC publishing services for the latest publication and availability of the new edition.
Q: Is it part of a series?
A: It is a standalone IEC standard developed by TC 3 (Documentation and graphical symbols) and has been adopted regionally as EN/NEK versions; it is commonly used alongside other IEC/CENELEC standards covering wiring, documentation and electrical installation practices.
Q: What are the key keywords?
A: Cable labelling, core identification, conductor marking, wire marking, technical product documentation, industrial wiring, traceability, connection labelling.