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Description of BS 7924:1999 1999This British Standard gives recommendations for the repair, overhaul, reclamation and modification of certified electrical apparatus intended for use in mines susceptible to firedamp (defined as “Group I” apparatus in the explosion protection concept standard BS EN 50014:1998). Maintenance is not covered, other than where this cannot be dissociated from repair and overhaul. It does not give advice on the use of electrical apparatus or the prevention of any hazards other than ignition of an explosive atmosphere. Similarly, it does not give advice on cable entry systems which may require renewal when the apparatus is re-installed.
Clauses 4 to 9 give general recommendations applicable to persons involved in the repair and/or overhaul of electrical apparatus intended for use in potentially explosive atmospheres found in coal mines. They also identify certain specific responsibilities under the Health and Safety at Work etc. Act 1974 [6] as applicable to those who are likely to be concerned with the repair of certified apparatus. Clauses 10 to 15 cover those aspects of repair and overhaul which are common to all explosion protected apparatus. Clauses 16 to 18 give recommendations applicable to specific types of explosion protected apparatus. This standard excludes apparatus having the following forms of protection, which is generally considered irreparable: oil immersion “o”; pressurized “p”; powder filling “q”; and encapsulation “m”.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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