Defines 'intrinsically safe'. Dangerous industrial gases and vapours, for which certificates of intrinsic safety may be obtained, are listed and classified. Principles of and tests for intrinsic safety appended. (See also BS 5501-7, identical to EN 50020, referred to in EEC Directives, and BS 5501-9, identical to EN 50039).

? British Standards Institution 2013

Amendment notes:
AMD 3605 published 31 March 1981
PD 4213 published 14 July 1961
PD 4836 published 18 March 1963
PD 5370 published 29 October 1964
PD 3511 published 30 October 1959. PD 3788 published 15 October 1981. PD 3888 published 18 August 1960. PD 4669 published 11 October 1962. PD 4836 contains the matter in PD 3511, PD 3788, PD 3888 and PD 4669, and Table 1 from PD 4213

BS EN 50020:2002

AS C376-1968 - Equivalent