Dimensional and test requirements for plugs and sockets incorporating three power contacts, one auxiliary contact for electrical interlocking and a scraping earth contact; primarily for mining apparatus connected to its power supply by a flexible cable.
BS 5125:1974
Original price was: $264.16.$132.00Current price is: $132.00.
Specification for 50 A flameproof restrained and bolted plugs and sockets for voltages not exceeding 650 V, primarily for use in mining
BSI Group , 01/30/1981
