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  1. #1
    Join Date
    Jun 2010

    Default cp-300 welder(const voltage power source) 460v vs 480v

    we have aquired a cp-300 mig, serial JK614003, stock 902931 , for our mech maint shop. The spec plate indicates 200/230/460 volts 3 phase of course. Our electrical panel is 480 v 3 phase. Will this welder work powered from a 480v panel tapped for 460 v. ? appreciate advice.

  2. #2
    Join Date
    May 2010
    Central CA

    Default Should

    Some people call the voltage: 110,115, or 120, then 220,230,240 which gives rise to 440,460, and 480.

    On page 8 show the jumper posititons.

    Good Luck
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  3. #3
    Join Date
    Jun 2010


    thanks miller, i'll check the actual voltage, I checked the jumpers and they are on the 460 taps. I'll get back later. thanks again.

  4. #4
    Join Date
    Mar 2010
    Ceres, California


    You will not have a problem. I do believe It is + or - 10%.
    460 volts plus 46 volts is 502 volts. max.
    I have seen these unit run all day long on 480 to 490 volts.
    Where you will have a problem is with a 575 volt machine run on 480.
    the contactor coils will short out from to much current. caused by low voltage.
    Glenn 300 amp stick
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    L-tec plasma

  5. #5
    Join Date
    Jun 2010


    I powered up our welder last night , and it cooks just fine. Thanks guys for the input. Jim

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