['Specialized Industries']

['Mining']

07/19/2025

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§18.42 Explosion-proof distribution boxes.

...

§18.42 Explosion-proof distribution boxes.

RegSense CFR Regulations Mining Specialized Industries CFR Section English Focus Area USA

(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 each branch circuit connected to a distribution box. The current-carrying capacity of the specified connector shall be compatible with the automatic circuit- interrupting device.

(c) Each branch receptacle shall be plainly and permanently marked to indicate its current-carrying capacity and each receptacle shall be such that it will accommodate only an appropriate plug.

(d) Provision shall be made to relieve mechanical strain on all connectors to distribution boxes.

['Specialized Industries']

['Mining']

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