Amount of 12ga wires in 2in conduit
I have a 200amp service panel for my house in Glendale AZ and want to install a 100amp sub-panel for my garage/workshop. The electrical panel is on the other side of the house from the garage and I already have about 15,000 feet of 12ga stranded wire. Is it possible to run a 2 inch conduit through my attic of underground around the house and put about 6 or 7 circuits in it? I know I will lose some amperage when there are a number of wires run in the same conduit but how much I don't know. Additionally, is it permissible to have a 60 amp breaker in my service panel to run power to my 100amp sub-panel? Any help would be great! Thanks