Requirements for residual current protection of explosion-proof distribution boxes level II

(a) A cable passing through an outside wall (s) of a distribution box shall be conducted either through a packing gland or an interlocked plug and receptacle. (b) Short-circuit protection shall be pro...
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30 CFR § 18.42

(a) A cable passing through an outside wall (s) of a distribution box shall be conducted either through a packing gland or an interlocked plug and receptacle. (b) Short-circuit protection shall be provided for

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1910.307

One or more of the following protection techniques shall be used for electric and electronic equipment in hazardous (classified) locations classified under the zone classification system.

eCFR :: 30 CFR 18.42 -

(b) Short-circuit protection shall be provided for each branch circuit connected to a distribution box. The current-carrying capacity of the specified connector shall be compatible with the automatic circuit

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