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Thread: service equipment protection

  1. #11
    Join Date
    Jan 2007
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    2,748
    Quote Originally Posted by Dennis Alwon View Post
    If there is one main breaker than the overcurrent protective device must be rated no larger than the panelborad. There are 6 overcurrent protective device's in your scenario. You do not add up the breaker sizes.


    As David posted
    Which is correct but something I've never understood.
    Calculations done at the time of install may be greatly exceeded as load is added to a service over the years.
    Not sure if anyone ever actually thinks about the service conductors until they burn up from an overload.

    JAP>

  2. #12
    Join Date
    Jun 2006
    Location
    Ohio
    Posts
    21,077
    Quote Originally Posted by jap View Post
    Which is correct but something I've never understood.
    Calculations done at the time of install may be greatly exceeded as load is added to a service over the years.
    Not sure if anyone ever actually thinks about the service conductors until they burn up from an overload.
    As I understand it, the CMP will not entertain any change unless empirical evidence can be shown that a significant number of fires or deaths have resulted from such.
    I will have achieved my life's goal if I die with a smile on my face.

  3. #13
    Join Date
    Feb 2013
    Location
    Aspen, Colo
    Posts
    1,952
    Quote Originally Posted by david luchini View Post
    If there is no main, then the equipment buss is, by definition, service conductors.
    I will certainly look into that aspect David -- Hopefully my return call to the manufacture engineer & UL rep will shed a bit more light on the subject to share with all --
    CircuitRyder --- Unfortunately not all good ideas are code enforceable.

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