Yeah that's about how it works... but, if I remember correctly, 6 gauge wire goes with a 50 amp breaker and (as mentioned above) 12 gauge goes with 20 amp (14 gauge goes with 15 amp). Are you doing any 220? If so, you'll need 6-4 wire (6 gauge, with 4 wires [red, black, white, ground]). And, to be safe, add up the amps that you're going to use if you're going to be using a large amount, then check out the main wire going into your main breaker box and make sure it will handle everything you're running on top of everything else that might be running at the same time in your house (just in case you're in an old house with inadequate wiring). I've done a fair amount of wiring, so if you have any specific questions I'll help if I can.