BS 787-2 68th Edition, August 30, 1968
Specification for Mining type flameproof gate-end boxes - Part 2: Gate-end boxes with air-break circuit-breakers (for use on 3-phase a.c. circuits up to 650 volts)
Includes all amendments and changes through Reaffirmation Notice , June 1, 2016
Published By:British Standards Institution (BSI)
Service conditions; ratings, design and construction, including means of protection; test requirements.