Historical
IEEE Std 315A-1986
IEEE Standards Graphic Symbols for Electrical and Electronics Diagrams
Symbols approved by the International Electrotechnical Commission since 1975, or for which there is now a greater need in the US arising from international commerce, are provided. Besides the addition of new symbols, some updating of the information in IEEE Std 315-1975 has been undertaken.
Content Provider
Institute of Electrical and Electronics Engineers [ieee]