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240 For A Welder

 
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Old 12-02-2014, 05:40 PM   #21
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Re: 240 For A Welder


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Originally Posted by farmerkev View Post
Meadow, not sure what that would be.

dielectricunion, what's the way of fixing that?
The plug configuration.

https://www.google.com/search?q=nema...ed=0CAYQ_AUoAQ

Just to make sure you have the right plug.
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Old 12-02-2014, 07:38 PM   #22
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Re: 240 For A Welder


Well I turned off the power to the outlet and took the cover off and tried plugging the welder in a few times. Looking closely when the welder plug goes in one of the hots and the ground lug would contact each other. Replaced the outlet and bingo, back in action. I just didn't notice it before because I never tried pluggin it in without the cover on. Thanks for all the help guys.
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Old 12-02-2014, 07:40 PM   #23
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Re: 240 For A Welder


your welcome.

Oh wait, I WAS going to say the receptacle is shorting to ground.
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Old 12-02-2014, 07:54 PM   #24
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Re: 240 For A Welder


Might be a good idea to change that breaker back to the proper one. Just a thought.
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Old 12-02-2014, 08:25 PM   #25
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Re: 240 For A Welder


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Might be a good idea to change that breaker back to the proper one. Just a thought.
Why is it the wrong breaker?
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Old 12-02-2014, 08:41 PM   #26
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Re: 240 For A Welder


I believe his point is the dedicated breaker's rating should correlate with the draw, not have excessive excess.
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Old 12-02-2014, 08:43 PM   #27
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Re: 240 For A Welder


Yeah. 30 amp welder. 30 amp breaker.
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Old 12-11-2014, 02:02 PM   #28
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Re: 240 For A Welder


Not correct. Because electric arc welders are based on duty cycle and their max current draws are normally not more than a few minutes, the section in the code book referring to dedicated circuits for welders allows a certain amount of up sizing of the breakers to prevent tripping at max duty cycles.

Look it up.

If its a general purpose 240v garage circuit I concur with the appropriate size ocpd for the wire's ampacity.
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Old 12-11-2014, 10:06 PM   #29
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Re: 240 For A Welder


Well, I'm not an electrician, I just post on electrical threads. That said. I run my welders that are supposed to be 30 amps on 20 amp breakers without any issues.
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Old 12-11-2014, 10:51 PM   #30
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Re: 240 For A Welder


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Originally Posted by farmerkev View Post
Why is it the wrong breaker?
I install the breaker allowed by the wiring.
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Old 12-13-2014, 07:39 AM   #31
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Re: 240 For A Welder


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Well, I'm not an electrician, I just post on electrical threads. That said. I run my welders that are supposed to be 30 amps on 20 amp breakers without any issues.
The breaker protects the wiring, NOT the load (welder in this case). So a "30A welder", which is an inaccurate description btw, certainly CAN be plugged into a 50A circuit. How is this ANY different than a 1A radio plugged into a 20A kitchen counter receptacle?

In fact my Miller 175 draws in the 30A range max, and came from the factor with a 50A/250V plug attached. This is very convenient since many buying a medium sized mig such as this will already have a stick welder, as I did.

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