I've got a shed that I'm wiring. I've used 12-2 to wire 15A outlets, 2 single switches each to a fixture, and three GFCI outlets to start each circuit. All of that goes back to an interior 100A subpanel with a 60A main lug and three 20A breakers. So far, does everything sound okay?
The big question for me is connecting that to my main panel which is about 45-50' away in direct line of sight on the exterior of my house. I'm thinking of going underground with conduit and connecting that up to a new 60A breaker on my main panel. If this sounds correct, what kind of cable is needed to connect the two panels (UF/TW) and what gauge (6-3, 4-3)? Any other things I may be overlooking will be greatly appreciated.