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New Guy - Q. about Power Req.

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  • New Guy - Q. about Power Req.

    Hi all,
    I just found the forums yesterday. Looks like a great site.

    I just bought the Millermatic 180 and thought I had my shop ready to go with the right power requirements. Not so. I have a 220 line ran on a double 20amp breaker that’s about 10-12 feet from the box. It’s run with NM 12/2 wire with the wrong type outlet.

    For fear of burning it up or just not being able to support the draw of the welder.

    My question is this. Should I re-run a heavier wire with a larger breaker? Something like a #8 wire with a 30amp or even a 50amp breaker with a #6 wire? I’ll also need to install the right outlet for the welder (the name alludes me at the moment).

    Spec Requirements:
    1-Phase, 230V, 21.7Amp, 60Hz

    Thanks in advance for the help/guidance.

  • #2
    Your breakers are matched pretty good to you welder. The wire size is fine just change the outlet to the one you need.


    • #3
      Agreed. The National Electric Code agrees also.

      That welder will work just fine and safely on #12 wires, esp. at that short distance. You should even replace the breaker with a 30A and leave the #12 wires, if this receptacle is dedicated for welder use only.

      Just replace the receptacle with a NEMA 6-50R.


      • #4
        WOW, such quick responses.

        That’s fantastic news. I was wondering about leaving the wire in place . . .
        I've read a lot about hooking a dedicated outlet up for this welder and found that most if not all ratings are based on Amps. /draw.

        I just wanted to double check – safety and all, ya know.

        Thanks a mill, guys.