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Old 06-28-2009, 04:18 PM   #1
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Mig welder connection


I need a recept. for a mig welder.
Primary input data is: 230 vac, 22.5 amps, 60Hz.
Can I use #6 awg. with a 50 amp. recept. on a 50 amp. 2-pole breaker?
I believe I saw a post by speedy petey about this.
But I can't find it.

Or does the breaker and/or wire need to be smaller?
It will only be about a 3ft run from breaker to recept.

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Old 06-28-2009, 04:47 PM   #2
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Mig welder connection


Does the welder have a cord on it? NEMA 6-50P plug on the end of the cord?

I'd start by matching up the cord with the appropriate receptacle.

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Old 06-28-2009, 04:58 PM   #3
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Mig welder connection


Has a cord only. But it didn't come with a plug. I picked up a 50 amp. welder plug and socket from Home Depot. Can I use them?
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Old 06-28-2009, 05:00 PM   #4
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Mig welder connection


What wire size is the cord?
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Old 06-28-2009, 05:10 PM   #5
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Mig welder connection


Hard to make it out, but I think it says 12.

Here are the specs. I forgot to post.

Primary power: 230 VAC, 22.5 amp. 60Hz..

Secondary power: 30 VAC, 180 amp. 120 amps at 25% duty cycle.
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Old 07-01-2009, 05:42 PM   #6
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Mig welder connection


30 amp should be big enough. Where did you get 50 amp from?
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Old 07-01-2009, 06:45 PM   #7
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Mig welder connection


Quote:
Originally Posted by loyal View Post
Hard to make it out, but I think it says 12.

Here are the specs. I forgot to post.

Primary power: 230 VAC, 22.5 amp. 60Hz..

Secondary power: 30 VAC, 180 amp. 120 amps at 25% duty cycle.
With those specs, then you are allowed to use a 45 Amp breaker, along with a 50 Amp receptacle and cord cap.

You are allowed to set overcurrent protection at 200% of the rated primary current of the welder, with the next-larger size breaker permitted if that number does not correspond to a standard-size breaker. Since 240.6 states that 45 Amp is a standard size, then you can not utilize a 50 Amp breaker for such equipment.

But the rating of the receptacle on a 45 Amp circuit can be a 50 Amp NEMA 6-50R.
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Old 07-01-2009, 07:57 PM   #8
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Mig welder connection


Thank you for the reply kbsparky.
I think I seen the 50 amp recpt. and the 50 amp breaker
on an old post from speedy. But I think now that he was
referring to to an arc welder. I have a 30amp 2 pole on hand.
I think I'll use it as you have suggested.
Thanks much

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