Isolated ground conductors must be isolated and installed to meet which NEC provision?

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Multiple Choice

Isolated ground conductors must be isolated and installed to meet which NEC provision?

Explanation:
Isolated grounding is used to keep the equipment’s signal ground separate from the building’s grounding so sensitive electronics see less noise and interference. The NEC requires that isolated ground conductors be insulated from all other equipment grounding conductors and connected only to the isolated grounding terminal for the receptacle, with a return path to the panel’s grounding system. This arrangement is specified in NEC 250.146(D). The other sections don’t address isolating the grounding conductor: 250.122 deals with equipment grounding conductor sizing, 210.8 covers GFCI requirements for dwelling circuits, and 300.5 relates to general wiring methods and spacing.

Isolated grounding is used to keep the equipment’s signal ground separate from the building’s grounding so sensitive electronics see less noise and interference. The NEC requires that isolated ground conductors be insulated from all other equipment grounding conductors and connected only to the isolated grounding terminal for the receptacle, with a return path to the panel’s grounding system. This arrangement is specified in NEC 250.146(D). The other sections don’t address isolating the grounding conductor: 250.122 deals with equipment grounding conductor sizing, 210.8 covers GFCI requirements for dwelling circuits, and 300.5 relates to general wiring methods and spacing.

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