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Old 03-03-2012, 11:45 PM   #1
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Wiring, 230v extension chord

I want to make a 230v extension chord for my welder that runs off my dryer circuit. My welder draws 25A @ 230v at full load, max duty cycle 30%. I don't plan on welding anything on that high of setting, maybe 50% load.

I have a 50 ft 12/3 chord and a dryer plug.

Will this work?
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Old 03-04-2012, 09:09 AM   #2
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Chart here: Extension cord - Wikipedia, the free encyclopedia

12/3 should be fine for 50', although I wouldn't go any further than that.
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Old 03-04-2012, 10:29 PM   #3
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its not smart, the welder draws more at full power then the wire is rated for.

im sure you'll be fine. its intermittent and you'll keep it on a lower setting then full load.
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Old 03-07-2012, 05:04 AM   #4
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12/3 is not going to work, you'll just burn the wires cause it not rated for that kind of amperage. you must you 10/3 to make it work safely.
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Old 03-07-2012, 06:10 PM   #5
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i believe table 2 in the canadian electrical code shows for copper that #12 is rated up to 20 amps and #10 is rated up to 30 amps.

i think think you'd need #10 as pocha stated to be safe.
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