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Old 03-19-2008, 12:42 PM   #61
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Ele hot water tank and welder sharing circuit


Wazeaz

If you have the funds do exactly what inphase77 suggested or have an electrician do it. Your situation is pretty simple in comparison to others. I don't think the cost will be all that bad.

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Old 03-19-2008, 01:05 PM   #62
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Ele hot water tank and welder sharing circuit


Stubbie is rite. Either the welder has some weird plug on it, or it is a 3 phase welder. Can you get a model number off the welder. If I found a welder left behind under a box I would be careful it doesn't burn me. Does the welder seem warm, or HOT to the touch. Don't give us the serial # it might be on a list some place. This is getting better and better. Back to work.
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Old 03-19-2008, 01:34 PM   #63
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Ele hot water tank and welder sharing circuit


I didn't find it in a box. The movers put it in a box when we moved here. I'll try to get the model number when I get home. I bought the welder new 4 or 5 years ago. I know I hard it wired to a 240v 30 amp curcuit in my other house.

I like the idea of a new panel. For now I'm thinking I'll add another 30 amp breaker for the welder and put the replacment panel on my to do list,
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Old 03-19-2008, 02:01 PM   #64
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Ele hot water tank and welder sharing circuit


SORRY, I thought it was said you found it there. What is the model # of the welder.
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Old 03-19-2008, 03:05 PM   #65
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Ele hot water tank and welder sharing circuit


Wazeaz

Ok you have clarified the welder but if you want give us the model# or tell us what plug is on it from this chart.......

Look at the row 250V under the 2 pole 3 wire grounding chart.

http://www.jhlarson.com/ind_tables/n...a_straight.htm
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Old 03-19-2008, 07:37 PM   #66
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Ele hot water tank and welder sharing circuit


welder is Lincoln SP170t
I think the plug is 6-50P
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Last edited by wazeaz; 03-19-2008 at 07:48 PM.
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Old 03-19-2008, 07:51 PM   #67
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Ele hot water tank and welder sharing circuit


I thought you said it was a 4 prong plug back in post #35.

Last edited by RobertS; 03-19-2008 at 07:54 PM.
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Old 03-19-2008, 07:57 PM   #68
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Ele hot water tank and welder sharing circuit


Quote:
Originally Posted by RobertS View Post
I thought you said it was a 4 prong plug back in post #35.
yeah but then I drug the welder out of the box and it's 3. sorry
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Old 03-19-2008, 08:17 PM   #69
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Ele hot water tank and welder sharing circuit


Wazeaz

I located the welder owners manual here

http://content.lincolnelectric.com/p...r/im/IM794.pdf

Though it only has a 20 amp input at rated output they put a nema 6-50 on it and want it fused at 40 amps.

So what you need to do is run a 40 amp branch circuit from the main panel using those last two slots for a double pole 40 amp breaker. Use a #8/2 with ground copper cable to a 6-50R in the garage.
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Last edited by Stubbie; 03-19-2008 at 08:55 PM.
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