Grounding requirements for concealed electrical box enclosure

4 (A) & (B) have several provisions that require non–current-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, to be connected togeth...

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Grounding Requirements Concealed Electrical

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29 CFR § 1910.305

(i) Metal raceways, cable trays, cable armor, cable sheath, enclosures, frames, fittings, and other metal noncurrent-carrying parts that are to serve as grounding conductors, with or without the use of

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Equipment Grounding Equipment grounding must comply with the National Electric Code (NEC) Article 250. All noncurrent-carrying metal enclosures for electrical equipment or wiring must be grounded.

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