This International Standard provides rules for the designation of terminals of objects within a system.
The principles laid down are primarily intended for use in the electrotechnical and related areas, but are general and applicable to all technical areas. They can be used for systems based on different technologies or for systems combining several technologies.
BS EN 61666:1997 history
2021BS EN 61666:2010+A1:2021 Industrial systems, installations and equipment and industrial products. Identification of terminals within a system
2010BS EN 61666:2010 Industrial systems, installations and equipment and industrial products. Identification of terminals within a system
1997BS EN 61666:1997 Identification of terminals within a system