Whether you're installing, extending, or rewiring a circuit, finding out the wire gauge and amperage you will need is a key first step. The gauge—or size—of the wire used needs to match the ...

A. Conductor material types and sizing requirements are outlined in Sec. 310.3 [Conductors, Minimum Size and Material] of the NEC. As noted in Sec. 310.3(A) [Minimum Size Conductors], the minimum ...