IEC 60079-7 Ed. 3.0 b:2001
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Electrical apparatus for explosive gas atmospheres – Part 7: Increased safety “e”
Gives requirements for the design, construction, testing and marking of electrical apparatus, with a rated value of supply voltage not exceeding 11 kV r.m.s. a.c. or d.c., with type of protection ‘e’ that does not produce sparks, arcs, or dangerous temperatures in normal operation.
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