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Miller spot welder LMSW-52 with timer 230V 2.5kva plug rating?

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  • Miller spot welder LMSW-52 with timer 230V 2.5kva plug rating?

    What type of plug comes with this welder? The manual says tandem plug. Is this a 20amp or 30amp plug?

  • #2
    Please post the serial number so we can look it up.

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    • #3
      https://www.millerwelds.com/files/ow.../O716H_MIL.pdf

      Not much help though.

      The specs state 2.5KVA 30amps 10g power cord so I'm guessing a 6-30p is on the machine.




      Ed Conley
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      • #4
        Agree. There is a picture of the timer plug on page 23 of the manual and it sure looks like a 6-30p.

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        • #5
          The plug on the spot welder fits a 6-20p. I did some searching and found this interesting thread. I don't like it that I would need to install a 20amp outlet on a 30amp breaker. That seams it is against code. This thread addresses the issue but I'm not sure how to move forward. I thought maybe someone changed the plug but that seams not to be the case.

          http://www.tractorbynet.com/forums/r...tml#post229893

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          • #6
            See NEC (NFPA 70) Article 630. Special rules for welders.

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            • #7
              I'm going to install a 20amp breaker and 6-20P outlet for 220V. The welder will be over protected. It may trip the breaker at times.

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              • #8
                That is obviously perfectly safe. Please let us know how many nuisance trips you get if any.

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