I have a champion 4000 watt generator, it only has 120 volts. My generator is located about 50 feet from my house in a generator shed. I'd like to run a line from the generator underground to a 4x4 with a gfci receptacle by the house. This line would only be hot when the generator was in use and basically just allows me to not have extension cords running from my shed, the cords would start at the gfci and into the house. My question, since its possible for the generator to produce 4000 watts does my wire have to be Able to hold that total? In that case I'd have to run at least 10/2 probably 8/2, which poses the problem of connections to a gfci. Can I run two 12/2 lines and plug each into separate receptacles on the generator, than have 2 gfcis on the post? I'm attaching the wire to the generator with plug ends.