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Originally Posted by SmokingSS
ok...so is this how to wire a subpanel...
install a 60amp breaker in my main box,
run 6/2 (w/baregound) wiring from that breaker to my garage,
mount a 4 space/8 circuit subpanel in garage,
connect 6/3 to new subpanel keeping neutral and ground isolated,
install double pole 30 amp breaker in new subpanel,
...then basically wire up my compressor as shown above using only 5' of 10/2 wiring...
Does all that sound close to correct at least?
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I am not sure if you have a mistype when you say 6/2 but here is how I would do it. And no I am not an electrician but I work for a general contractor and I do alot of out electrical.
From the house you start with the double pole 60 amp breaker, You will run 6/3 with ground to the subpanel. In the main panel you connect the white and ground to the neutral/ground bus bar and the blk and red go to the 60 amp breaker. Run the new wire to a sub panel. Make sure it is a subpanel that has the neutral isolated from the ground. In the subpanel connect the red and blk to the main lugs and the white to the isolated neutral bar and the bare ground to the ground bar. Now any circuit you run from here on in this supanel must have the neutral and ground seperate. For your compressor I would run a 30amp double pole breaker and 10/3 or 10/2 which ever is needed) to a 30 amp 220v recepticle. Then hook up a cord that is rated for 30 amps to the compressor. Just make sure the plug on the cord matches the recepticle you used.