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Tripping Breaker

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Tripping Breaker

Postby r_maher03 » Mon Jan 08, 2018 5:35 pm

My father-in-law just gave me an old wire feed welder. I can't find a name on it anywhere but as far as I can tell from the serial number it is a Hobart built in 1986. It is a 240V model. The problem I am having is that sometimes when I press the trigger without even starting a bead it trips the breaker, sometimes it doesn't. The breaker is a 50 Amp with 6 gauge wire. I'm thinking it is a bad contactor but I'm not sure if that could be it or not. Any ideas??? Thanks
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Re: Tripping Breaker

Postby Mike » Tue Jan 09, 2018 8:34 am

Welcome to the forum.
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Re: Tripping Breaker

Postby Artie F. Emm » Tue Jan 09, 2018 1:51 pm

Welcome to the forum. Any chance you can test the machine on a different circuit? Breakers can go bad, an easier fix than digging into the guts of the welder.
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Re: Tripping Breaker

Postby r_maher03 » Tue Jan 09, 2018 3:37 pm

Artie F. Emm wrote:Welcome to the forum. Any chance you can test the machine on a different circuit? Breakers can go bad, an easier fix than digging into the guts of the welder.


Thanks, Artie. I was hoping it was the breaker but I was able to try it at a friends and it did the same thing. I did have to replace the plug on it. Would that have any effect? I would think if something was wrong with the plug it would trip it all the time.
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Re: Tripping Breaker

Postby Oscar » Tue Jan 09, 2018 4:46 pm

Have you opened up the plug to inspect the insides? Are the wire connection schemes secure? Screw-down terminals? If they go loose on you, that would/could cause problems. I've had them go loose on me before. Then I loc-tite'd them. Now that I think about it, I should have soldered the bare wires to the terminals after having tightened the screw-deals down.
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Re: Tripping Breaker

Postby r_maher03 » Tue Jan 09, 2018 9:11 pm

Oscar wrote:Have you opened up the plug to inspect the insides? Are the wire connection schemes secure? Screw-down terminals? If they go loose on you, that would/could cause problems. I've had them go loose on me before. Then I loc-tite'd them. Now that I think about it, I should have soldered the bare wires to the terminals after having tightened the screw-deals down.


Thanks for the reply Oscar. I opened up the plug and as far as I know, everything looks good.
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