Specification for interconnection of electrical apparatus, constructed to two or more British Standards, for use in mines susceptible to firedamp— 16 стр.
Specification for fully screened 400 A bolted flameproof cable couplers and adaptors for use on systems up to and including 6.6 kV, primarily for use in mines— 28 стр.
Mining type flameproof supply and control units for use on systems up to 1100 V, Specification for air-cooled transformers to power drilling machines— 26 стр.