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Two VFD on one circuit... possible problems?

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  • #16
    With both motors running on a 220 v circuit, that's about 18 amps. That's a lot on a 20amp circuit.

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    • #17
      it is, but that assumes both were developing that HP. A vfd by design/implementation is "soft start" and the OP said it happened as soon as he started it up, which means as the motor was spooling up on the lathe (low v/hz = low'ish power) or at vfd startup (no motor load).

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