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BS 4683-2:1971
M00000343
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BS 4683-2:1971 Specification for electrical apparatus for explosive atmospheres. The construction and testing of flameproof enclosures of electrical apparatus
standard by BSI Group, 03/12/1971
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Prescribes constructional features for flameproof enclosures for electrical apparatus for use in flammable or explosive gases or vapours and test requirements to be met. Enclosures are grouped according to their industrial applications and to the dimensions of permitted gaps. Indicates atmospheres for which the groups are appropriate.Replaces BS 229:1957, which remains current to maintain the validity of existing certificates and to grant supplementary certificates.