Electrical Outlet For Welding

Discussion in 'Electrical Forum discussion & Blog' started by willplunk, Aug 13, 2008.

  1. willplunk

    willplunk New Member

    Messages:
    3
    I have a Chicago Electric ( China) welding machine. It's a Dual Mig 131, Rated AC input 120 volts, 1 phase, 60 hertz, 21 amp. The electrical cord has a regular plug with 14AWGx3c wire. Can I install a 30 amp breaker in the main panel, and come off to a 30 amp receptecal. Then use a 50' extension cord to work outside. Would 12/3 wire be OK for the cord or would I need 10/3. Would this work OK? Any advice would be greatly appreciated. Thanks, Will
  2. Chris75

    Chris75 Electrician

    Messages:
    608
    Location:
    Litchfield, CT


    is the cord on the welder a factory cord? if so, thats the voltage and amperage you have to use.
  3. willplunk

    willplunk New Member

    Messages:
    3
    Yes, the 14AWGx3c stamped on the welding cord is the factory cord, The welder is new and has never been used. The 21 amp input confuses me as 14/3 is not rated for that much, right. The wall sockets are 15 amp, so I couldn't use them. Any suggestions and thanks Chris75 for the reply. Will
    Last edited: Aug 13, 2008
  4. Bob NH

    Bob NH In the Trades

    Messages:
    3,317
    Location:
    New Hampshire
    The specs on most of the homeowner style welders show a fairly low duty cycle. Try the welder on a 15 Amp circuit and see if the breaker holds.

    You may want to get a 20 Amp circuit to minimize voltage drop.
  5. Alectrician

    Alectrician DIY Senior Member

    Messages:
    689
    The #10 wire cord will work much better than the #12.

    I have a 120V lincoln wire welder and it needs all the juice it can get. I can see a difference in performance when I use a long #12 cord vs no cord. It still works and doesn't kick the breaker but it's not as "hot" and doesn't penetrate properly.

    20 amp breaker will hold but use #10 conductors and cord.
  6. Southern Man

    Southern Man DIY Hillbilly

    Messages:
    530
    Location:
    North Carolina
    "They" probably rate a portable appliance pigtail quite a bit higher than electrical cable permanently installed in long runs within wood framing.
  7. willplunk

    willplunk New Member

    Messages:
    3
    Thanks Guys for taking the time to comment.
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