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Thread: Plasma wiring Question....

  1. #1
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    Plasma wiring Question....

    So, I just moved my shop and I had my Miller Spectrum 375 wired for 230v. Now, my new shop only has 250v outlets. Does anyone our there know if I can wire my cutter for 250v and not kill my machine?

  2. #2
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    Re: Plasma wiring Question....

    im sure someone will correct me if im wrong but if you didn't change countries when you moved your shop and the plugs look the same its probable still 230.

    disclaimer: i am not a registered electrician i just know enough to do basics. if you need a 100 % answer go to Canadian tire get a multi meter and test it.

    good luck

    ryan
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  3. #3
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    Re: Plasma wiring Question....

    I take it you're talking about the N.E.M.A 250V rating listed on the outlet. It's just that - a rating figure and not the actual outlet voltage which would be a nominal 230V and often listed/referred to as 220V or 240V.

    No change to your machine wiring required.
    MM200 w/Spoolmatic 1
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    MUTT Suitcase Wirefeeder
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    '68 Red Face Code #6633 project
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  4. #4
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    Re: Plasma wiring Question....

    Voltage rating of outlet doesn't mean that that's what the voltage really is.
    In U.S. Outlets used for 230v/240v. are rated 250v.
    If in doubt measure voltage.If it's high,contact miller.
    (I don't think 250v. would be a problem)
    Miller a/c-d/c Thunderbolt XL
    Millermatic 180
    Purox O/A
    Smith Littletorch O/A
    Hobart Champion Elite

  5. #5
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    Re: Plasma wiring Question....

    All my 230V gear operates at 245V +/- because the transformer is right outside the shop on the last pole on the line. OCVs run a couple volts higher than ratings as a result.
    MM200 w/Spoolmatic 1
    Syncrowave 180SD
    Bobcat 225G Plus - LP/NG
    MUTT Suitcase Wirefeeder
    WC-1S/Spoolmatic 1
    HF-251D-1
    PakMaster 100XL
    '68 Red Face Code #6633 project
    Star Jet 21-110

    Save Second Base!

  6. #6
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    Re: Plasma wiring Question....

    Someone once told me that if supplied voltage is within 10% of machine nameplate
    rating it's ok.They may have pulled that number out of their ear,but I've been using that
    for many years.
    Miller a/c-d/c Thunderbolt XL
    Millermatic 180
    Purox O/A
    Smith Littletorch O/A
    Hobart Champion Elite

  7. #7
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    Re: Plasma wiring Question....

    My stuff has been running on 245 to 247 for many years. Transmission is 2 leg polyphase so I have the wild leg 3 phase coming in. No problems (well the transmission switching has caused me to drop two isolation transformers for UPS boxes...)

    Matt

  8. #8
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    Re: Plasma wiring Question....

    You've already gotten the correct answer, so I'll just add this about single-phase power in North America:

    125/250V - voltage rating of devices, including switches and receptacles
    120/240V - nominal voltage (nominal from the Latin for "name") - it's the official voltage designation, and is what's used in the NEC (and presumably the Canadian CSA C22.1)
    115/230V - motor rated voltage - performance parameters are based on these voltages, including current, efficiency, power factor, and many others (allows for some voltage drop in the supply conductors and sag in transformers under load)
    110/220V - obsolete voltage designation that most folks still use - "220, 221, whatever it takes."

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