I'm looking for material to run a single 20A circuit from my box in my basement to my garage which has no power atm. I've gutted and rewired the entire house with no problems but the book i've been studying out of, " Residential Wiring" doesn't really have much detail on this. My local code guy said i didnt need a sub panel but i did need a main shutoff switch. Also i should add that i want to run it overhead. I'm not sure what kind of wire i need. Something like a SWA? I'm not running any other wire i.e. phone or other low voltage. Any help is appreciated. Also...if i dont need a subpanel would the wire coming from outside into the garage be ok to go strait to a RCD? coudln't i then branch off to my 20A duplex gfci and switch for light? Sorry for all the questions but this is the ONE situation i've been stumped on.