Randall wrote:
> > 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.
I'm no electrician. All I can say is that about 2 years ago the electrical
inspector here in Linn County, OR made me correct my wiring by connecting
the third wire of my shop 220 circuits to Neutral, rather than Ground.
I assume this is how household 220 circuits were wired (prior to the 4 wire
circuits required today) to accommodate things such as 110V light bulbs
in the dryer or oven. I had wired them to Ground, as it seemed more
appropriate for equipment such as compressors and welders, but the
inspector gave me a correction notice, and passed me only after I changed
it.
Harry Phinney
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