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Old 11-25-2011, 06:21 PM   #1
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Default gfci circuit with welder

I was going to run my elecric this weekend for my rig. 50 amp gfci mounted in the circuit panel, 6 guage wire with ground and a neutral. I wanted to run my welder off of the same circiut, of course not at the same time I brew. My brother brought up the question if the welder would cause a lot of false trips, etc. of the gfci. Doing research on the web has all kinds of answers. Some people say you can't do it, others say no problem. With so many pro diy'ers here, I am sure someone knows the answer.

gunmetal is offline
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Old 11-25-2011, 06:39 PM   #2
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was told by a steamfitter that a welder wont run on a gfi

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Old 11-25-2011, 08:59 PM   #3
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depends on the welder. GFCI work by measuring any imbalance between electricity going out and coming back. A basic Stick welder (buzz box) does not isolate incoming and the welding circuit, allowing the ground as a return path which trips the GFCI. With MIG and TIG welders, it depends on the type. while i have not tested it out, the new electronic ones should run on GFCI.

A work around is replace the panel breaker with a regular 50 amp, use the GFCI 50 in a "spa disconect' with a cord you plug into the welding outlet.
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Old 11-25-2011, 09:20 PM   #4
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I have no problems running my Hobart MIG & Miller TIG off of a 50 amp gfci.
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Old 11-25-2011, 11:06 PM   #5
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My lincoln MIG runs just fine on a GFCI.

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