What size wire would I need to run a 100 amp subpanel 28 feet away? I have 6/3 wire would that do it?
Just to answer the question..
You'd need 4 (Hot, Hot, Neutral, Ground) #1 AWG wires.
- 1 AWG supplies up to 110 amps
- 6 AWG supplies up to 55 amps
If you use the 6 AWG, you could only feed the subpanel with a 50A breaker. Essentially making it a 50A subpanel. It's best to go ahead and get the most out of it if you can by using #1 wire.