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  1. #1
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    Jul 2009
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    Default new panel for new home

    we are building a new home the plans say the eletrical VA quote is 55600 it says i need a 300 amp panel can anyone advise how you work this it ie how do you arrive at the figure 300amps from just 55600va

  2. #2
    Join Date
    Feb 2009
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    Default Re: new panel for new home

    Ohms law.

    55,600VA (Watts) / 240Volts = 231.666 Amps. Post back all electical usage and SQ/FT and would be happy to recalc.

  3. #3
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    Default Re: new panel for new home

    Simple answer 55600va/240 volts =55600/240 volts = 231 amps

    If you actually have that much of a constant load you multiple the amps times 1.25 so 231 X 1.25= 288.75 amps The smallest panel avalible would then be a 300 amp panel and service.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  4. #4
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    Default Re: new panel for new home

    Quote Originally Posted by JLMCDANIEL View Post
    Simple answer 55600va/240 volts =55600/240 volts = 231 amps

    If you actually have that much of a constant load you multiple the amps times 1.25 so 231 X 1.25= 288.75 amps The smallest panel avalible would then be a 300 amp panel and service.
    Jack
    Naw. Wrong.

    The first 10Kva is figured at 100% and the rest at 40% as far as service size per NEC.

    A load calc needs to be done for the home. Really doubt a 300A service is required.

  5. #5
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    Default Re: new panel for new home

    Quote Originally Posted by NEC View Post
    Naw. Wrong.

    The first 10Kva is figured at 100% and the rest at 40% as far as service size per NEC.

    A load calc needs to be done for the home. Really doubt a 300A service is required.
    I said "If you actually have that much of a constant load " perhaps I wasn't clear enough, I guess I should have added "unlikely". But I do agree that a load calc needs to be done and doubt a 300 amp panel would be required.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  6. #6
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    Feb 2009
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    Default Re: new panel for new home

    Quote Originally Posted by JLMCDANIEL View Post
    I said "If you actually have that much of a constant load " perhaps I wasn't clear enough, I guess I should have added "unlikely". But I do agree that a load calc needs to be done and doubt a 300 amp panel would be required.
    Jack
    If 55,600Va is a constant load, these folks need a serious lifestyle change.

  7. #7
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    Default Re: new panel for new home

    Quote Originally Posted by NEC View Post
    If 55,600Va is a constant load, these folks need a serious lifestyle change.
    Maybe they make a lot of money. Could be they are all plumbers.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  8. #8
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    Default Re: new panel for new home

    Quote Originally Posted by JLMCDANIEL View Post
    Maybe they make a lot of money. Could be they are all plumbers.
    Jack
    Well, they are not electrical contractors for damn sure.

  9. #9
    Join Date
    Jun 2007
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    Shamokin, Pa.
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    645

    Default Re: new panel for new home

    Quote Originally Posted by NEC View Post
    If 55,600Va is a constant load, these folks need a serious lifestyle change.
    Just might be Al Gore's new cool abode.......

  10. #10
    Join Date
    Jun 2007
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    Default Re: new panel for new home

    Perhaps a lot of grow lights?
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

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