eprosenx
Active Member
I used #8 wire because it was available. I have conduit on both ends going in the attic and the run is only about 40 feet. I can always upgrade to #6 and 50A if ever needed in the future.
Oh btw, #8 THHN in conduit is rated for 50 amps (assuming you don't have to derate for temperature in the attic - though you get to use the 90c rating on the wire as your starting point for that deration if necessary). So you might be allowed to do a 50a breaker/circuit off that #8 awg anyway.