Wire for 50A 220V Service - 110' run
I have on hand about 30' of #2 aluminum wire and about 100' of #6 aluminum wire. The run from the breaker to the outlet will be about 120'. Can I run about 30' or so of #2, then continue with #6 to ...
Forum Discussion
BurbMan wrote:
60 Amp is too big for the #8 wire you have running to the barn. That should be a 40a double-pole breaker at the source. I believe that NEC requires a disconnect for all sub-panels so you should have a 40A double pole as the "main" in the barn, then a 30A double pole for the RV plug and a 15A single pole for the light circuit.
Somebody please chime in if this is not correct.
When I wired my shop 10 years ago a main wasn't need in the subpanel so long as there were at most 3 subcircuits and they were labled "main". That may have changed by now and a main sure doesn't hurt anything.
The key thing was what I posted a few posts above: The 2 hots must be on opposite legs of 240V which means they need to be on one breaker. That breaker must be sized to the wire's capacity which is certainly not 60A. Never use 2 hots on the same breaker terminal and never connect them to the same leg with only one neutral.
