Join Date: Mar 2003
Location: PDX vicinity
Bronco Info: '78 Bronco with motor, axles and stuff
I think there's some confusion here, as usual, so let's go over this again...
The problem is there is a 4 wire receptacle that the brother wants to be able to use his 3 wire equipment from. Are we all good with that so far?
The 4 wire receptacle would be fed from a (?)amp 2 pole breaker: 2 hots, a neutral and a ground feeding the 4 wire receptacle. Still good?
The recommendation I and others made is pretty straightforward: remove the 4 wire receptacle, and install the 3 wire receptacle of a similar voltage and current rating. If this part gets confusing let's go into some detail... His equipment is already wired, and for the hell of it let's just assume it's been done correctly. The 3 wire receptacle is the part that is in the wall. It has 3 terminals on it and they are for connecting the two hots and the ground (green or bare) wire. So the use of the existing circuit wires to wire this 3 wire receptacle correctly leaves the white (neutral) wire without a terminal. That's why it would be abandoned and safe-ended for possible future use. Enough detail?
There are instructions in the operators/installation manual of every welding machine I have ever wired...
"Install equipment in accordance with the US National Electrical Code, local electrical codes, and manufacturer's recommendations"
"Ground the equipment in accordance with the US National Electrical Code and manufacturer's recommendations"
The NEC does not permit the use of the groundED (neutral, identified, white or natural gray) conductor as an equipment ground. It also forbids any load side (of the service bond) connection of the groundED (neutral, identified, white or natural gray) conductor to the groundING (green, green/yellow stripe, bare) conductor. That's the reason why I say DON'T DO IT!
Mike2... you've got 18 and a half thousand posts in less than 3 years. When have you had time to learn electrical work?