I am thinking about putting a 100A sub panel in my unfinished basement to feed receptacles, a washer/dryer, and possibly some lights. I have a single floor ranch (manufactured home) with a 1 car garage under the house in the basement. The main panel is located on an outside wall in the garage. (how convenient right?)
My question is this. Is there any way to go about running the supply from the main panel across the garage and into the basement without having to rip down the sheetrock in the garage? Being that the garage is "inside" the house it has the code required sheetrock and I would really rather not have to rip down and replace. Is there any code-legal way to come out the side of the panel and transition through the sheetrock via a box to conduit somehow?
2nd part of this question: I know I need 2 hots a neutral and a ground, is 3 AWG copper sufficient?