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    jimmarquardt's Avatar
    jimmarquardt Posts: 1, Reputation: 1
    New Member
     
    #1

    Feb 2, 2014, 03:54 PM
    Free electrical questions
    I have a 220 welder plugged into a 30 amp breaker and a 50 amp rated plug. I just bought a 220 compressor and was wondering if I could make or have made a short cord with an adapter to plug into the 50 amp plug?
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
    Ultra Member
     
    #2

    Feb 3, 2014, 04:39 AM
    You can do anything you choose...
    What is your real question?
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
    Printers & Electronics Expert
     
    #3

    Feb 3, 2014, 11:32 AM
    You might want to stop and think just a tad, here. Just for the record, the nominal voltage is now 240, not 220 but that is not an issue. Motor branch circuits are a different breed of branch circuit.

    You have given us only one piece of valid information. A 30 amp circuit connected to a 50 amp receptacle for a cord and plug welder. Perfectly acceptable.

    This proposed compressor, does it require a 30 amp branch circuit using 240 volts?

    Motor circuits are not calculated the same way a general branch circuit is calculated.

    The breaker may be required to be quite a bit higher in amperage to allow for the "Start Inrush Amperage" needed by the motor. Also, a motor conductor is required to be sized at 125%.

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