Specification for 1.9/3.3 kV, 300 A bolted flameproof cable couplers and adaptors (including 380/660 V and 640/1100 V, 300 A adaptors) for use in coal mines|Mechanical testing, Electric contacts, Electrical components, Bend testing, Drop tests, Marking, Electric connectors, High-voltage tests, Rated voltage, Protected electrical equipment, Electric pins, Design, Sampling methods, Clearance distances, Rated current, Electrical insulation, Temperature rise, Cable glands, Test specimens, Sealing rings, Type d protected electrical equipment, Mining equipment, Dimensions, Type testing, Leakage paths, Pressure testing, Boxes (electric), Tensile testing, Armoured cables, Heating tests, Electrical testing, Cable junctions