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    E kubicki's Avatar
    E kubicki Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 22, 2015, 01:14 PM
    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?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Feb 22, 2015, 04:03 PM
    Somewhere over 400A. It is impossible to say accurately, breakers trip on a curve, not at a definite predetermined rating.
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