Where ungrounded conductors are increased in size from the minimum size that has sufficient ampacity for the intended installation, wire-type, equipment grounding conductors (where installed) shall be increased in size ____, according to the circular mil area of the ungrounded conductors.

Question

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When ungrounded conductors are increased in size from the minimum size that has sufficient ampacity for the intended installation, wire-type, equipment grounding conductors (where installed) shall be increased in size proportionately, according to the circular mil area of the ungrounded conductors. This ensures that the equipment grounding conductors can handle any potential fault current that may occur.

Where Ungrounded Conductors Are Increased in Size from the Minimum