Mike Sloane wrote:
>
> I am confused. When I wired up my compressor motor, I ran (through a 50
> amp plug and receptacle) both wires from the ganged breaker to the two
> contacts on the switch. Since there was a third wire in the sheath, I
> ran a frame ground to the common ground on the box. Was that wrong?
Nope, that's just fine. The third wire you ran is a 'safety ground',
since it doesn't carry power needed for the compressor or (I assume)
welder. Just don't add anything that draws power through that ground,
like a 110v light bulb (or a 110v fan inside the welder). If you have a
110v part, you need to run a 4th wire, to be the neutral/common and
carry power.
Sheathed wire is available for this purpose (ask for 10/3 with ground or
whatever size you need), but it is somewhat harder to find, and more
expensive.
Randall
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