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-   -   400 amp 3 phase breaker has how many amps per phase? (https://www.askmehelpdesk.com/showthread.php?t=808571)

  • Feb 22, 2015, 01:14 PM
    E kubicki
    400 amp 3 phase breaker has how many amps per phase?
    How many amps per phase will a 400 amp 3 phase breaker allow before it trips?
  • Feb 22, 2015, 04:03 PM
    stanfortyman
    Somewhere over 400A. It is impossible to say accurately, breakers trip on a curve, not at a definite predetermined rating.

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