77th Edition, December 30, 1977
Electrical Apparatus for Potentially Explosive Atmospheres Part 7: Intrinsic Safety 'i'
Includes all amendments and changes through Amendment 17, March 15, 1994
Superseded By: BS EN 50020
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Description / Abstract:
Intrinsically safe electrical apparatus in which the electrical circuits themselves are incapable of causing ignition of a surrounding explosive atmosphere. Supplements and modifies Part 1