BASIC NEC CODE RULES AND DESIGN PRACTICE

Note: Minimum Circuit size is #12 with 20 Amp CB. Circuit Breaker Size. ... and separate grounding bars. A separate grounding wire must be run from the wire gutter to each subpanel, and connected to the ground bar. The ground wires of the branch circuits of Panels C and D must be attached to a separate ground bar in each panel. ................
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