Going by the chart of wire sizes and how many amps different sizes can handle, here's my question. I see a # 10 guage wire can hold 30-35amps. However, can it hold more amps if it were being used for the neutral?
No. There's a law called Kirchhoff's Law. Basically all the current from a power source must return to that power source. So, if 30 amps leaves on a hot (black) wire, then 30 amps must come back on the neutral (white) wire. The algebraic sum of currents in a network of conductors meeting at a point is zero. Power leaving the power supply (-) must equal the power returning to the power supply (+). If 30 amps leaves the power source (-30 amps) then 30 amps must return to the power source (+30 amps).
No, and the wire size must always be sized larger than the circuit breaker.
Your hot and neutral need to be the same size wire, your ground wire can be smaller.
