Spot Welder Outlet


Old 05-07-05, 09:00 PM
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Spot Welder Outlet

Question about installing an outlet for a 230V 30A Hobart
Spot Welder.

My garage has a sub panel, with a 230V breaker and two
115V breakers.

The 230V BX that was run appears to be 4-wire, (red/black/white
and the BX shielding being the ground, I assume).

The welder is 230V/30 Amp, however the plug I was told
is a 2-wire plug. Two horizontal flat spades and a rounded
ground prong.

Can I use the existing wiring, or will I need to get another
breaker and re-wire?


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Old 05-07-05, 09:05 PM
Join Date: Sep 2000
Location: United States
Posts: 18,497
Do you know the age of the BX?
Do you know the gauge of the wire in the BX?
Do you know what the BX formerly served?
Old 05-07-05, 09:11 PM
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Not sure on the age, but probably 10-15 years at least. Gauge, not sure.

However it did service a natural gas heater in the garage from what I
can tell. The gas line is still there.

I'll see if I can figure out the gauge and report back.


Old 05-08-05, 08:51 PM
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Spot Welder Outlet - BX Gauge

Well, I'm not that great at telling what gauge the BX that is in place is, but opening the subpanel at least let's me see the wires. They appear to be the
same as the romex that I have, 10/3.


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