BS EN 61666:2010+A1:2021-Industrial systems, installations and equipment and industrial products. Identification of terminals within a system
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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.
ICS 01.080.30 Graphical symbols for use on mechanical engineering and construction drawings, diagrams, plans, maps and in relevant technical product documentation