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Code · CFR · Title 30 — Mineral Resources · Part 18 · § 18.42

§ 18.42. Explosion-proof distribution boxes.

100 words·~1 min read·/us/cfr/t30/s§ 18.42·

A research copy — for the controlling text, always check the official state or federal source. Not legal advice.

(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.
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