Most charts provide ampacity for copper and aluminum wire and their most common insulation ... is made of a single solid copper conductor. It tends to be much easier to secure in standard switches ...

The neutral conductor of a 3-wire circuit from a 4-wire, 3-phase, wye-connected system is considered a current-carrying conductor for conductor ampacity adjustments per Table 310.15(C)(1) [Sec. 310.15 ...

It is of fundamental importance across a broad range of electrical projects to ensure the right wire size is chosen for the given application.