BS 787-4:1972

This standard BS 787-4:1972 Specification for mining type flameproof gate-end boxes is classified in these ICS categories:

• 29.130.20 Low voltage switchgear and controlgear
• 29.260.20 Electrical apparatus for explosive atmospheres

This British Standard specifies requirements for flameproof gate-end boxes designed primarily for use in the mining industry, on 3-phase a.c. circuits up to 650 V, for controlling one or two electrically-operated drilling machines.

NOTE The titles of the British Standards referred to in this standard are listed on page ii.

For controlling electrically operated drilling machines. Service conditions; ratings, design, construction and means of protection; test requirements.