Specification for 3.8/6.6 kV, 300 A bolted flameproof cable couplers and adaptors, for use in coal mines.|Records (documents), Protected electrical equipment, Type d protected electrical equipment, Pressure testing, Type testing, Mining equipment, Bend testing, Dimensions, Electric connectors, Cable glands, Cable junctions, Rated voltage, Quality control, Clearance distances, Design, Temperature rise, High-voltage equipment, Electrical testing, Sampling methods, Leakage paths, Marking, High-voltage tests, Electrical components, Testing conditions