Which size is used for distribution grounding?

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Multiple Choice

Which size is used for distribution grounding?

Explanation:
Grounding conductors for distribution are sized to provide a low-impedance path for fault current, so the protection device can trip quickly. The size is chosen based on the overcurrent device protecting the feeder, following NEC 250.122 guidelines. For many distribution feeders, No. 2 copper is the standard size because it offers a reliable balance of carrying fault current safely without being unnecessarily oversized. Larger sizes like 4/0 or 2/0 would be more than what’s typically required for common distribution OCPDs, while smaller sizes wouldn’t meet the required fault-current capability. So No. 2 copper is the typical distribution grounding conductor.

Grounding conductors for distribution are sized to provide a low-impedance path for fault current, so the protection device can trip quickly. The size is chosen based on the overcurrent device protecting the feeder, following NEC 250.122 guidelines. For many distribution feeders, No. 2 copper is the standard size because it offers a reliable balance of carrying fault current safely without being unnecessarily oversized. Larger sizes like 4/0 or 2/0 would be more than what’s typically required for common distribution OCPDs, while smaller sizes wouldn’t meet the required fault-current capability. So No. 2 copper is the typical distribution grounding conductor.

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