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15 amp breaker continuous current

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    15 amp breaker continuous current

    I had a master electrician test recently and there was a question I was unsure of.

    How much is the max current you can run on a 15 amp breaker continuously? I thought those breakers were not rated for 15 continuous But couldn’t ding reference

    What is the maximum motor current on a 15 amp breaker.

    #2
    If connected to a continuous load the CB is limited to 80% of its rating.
    Rob

    Moderator

    All responses based on the 2017 NEC unless otherwise noted

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      #3
      Originally posted by infinity View Post
      If connected to a continuous load the CB is limited to 80% of its rating.
      I thought that was true do you k is the code reference I have had no luck

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        #4
        Originally posted by infinity View Post
        If connected to a continuous load the CB is limited to 80% of its rating.
        Correct me if I’m wrong 210.20(A) may answer both my questions. Motor is continuous load

        the overcurrent device shall not be less than the non continuous plus 125% of the continuous load.

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          #5
          Originally posted by infinity View Post
          If connected to a continuous load the CB is limited to 80% of its rating.
          unless the CB is 100% rated. I don't think there are any 15A 100% breakers though.
          Bob

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