I am planning to run power out to my small shed/shop in the backyard. I would like to run a subpanel out there with two 20 amp circuits on it. The wire from the main breaker box will be approximatly 100 feet long between main and sub pnal boxes, all inside conduit.
What size wire should I use? would 8 guage work ok? or do i need to go to 6 or better? I ask because I have a roll of 8/3 sitting here in the house and I dont want to have to go spend $100 on new wire if this will work.
The set-up out in the shed will have my compressor running off one dedicated 20 amp circuit and a couple small lights along with outlets running on the other circuit for small powertools (circular saw, miter saw etc..). The compressor is my most power hungry piee of equipment.
What size breaker in the main panel should I run it from? 40? I can see the compressor kicking in just as I fire up the circular saw and popping a 30 amp breaker so i want to have at least a 40 amp supply out to the shed.. Can someone help me work out the details?