220 v for sub-panel
Registration here comes under the "difficulty file."
Now back to the reason for the post. I have a main panel in the two car garage, and I have a sub panel in the detached garage. I have #6 gauge 2 wires...Red, Black, White, and Green connected to a two pole 50 amp circuit breaker in the main panel. The #6 four wires run in a 1-1/2" gray PVC pipe ...2 feet under ground to the sub panel. There are six slots for circuit breakers. I have four 20 amp single breakers with 110 v to all the receptacles I need in the garage. I need to install a 220v receptacle for my 220 volt welder. Question. Do I need to install a 50 amp two pole breaker? As on the other end in the main panel there is the 50 amp two pole that feeds the sub panel. What size wire will I need to feed the wall receptacle? The plug on the welder in a three prong. Do I need to run two Blacks and White to the wall receptacle, or four wires? Also, will I need to make the main panel two pole circuit breaker a 100 amp?
Thanks for the great replies.