BS 3101:1986

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Specification for control and interlock circuits primarily associated with flameproof restrained plugs and sockets for use in coal mines|Safety devices, Electric current, Protected electrical equipment, Type d protected electrical equipment, Electric plugs, Type i protected electrical equipment, Interlocks, Electric connectors, Mining equipment, Remote control systems, Electric sockets, Control systems, Coal mining, Circuits, Ratings, Electrical resistance, Electric control equipment

112 GBP