Thread: new panel for new home

1. Junior Member
Join Date
Jul 2009
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1

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. NEC
Banned Rank 2
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Feb 2009
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693

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. 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

4. NEC
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Re: new panel for new home

Originally Posted by JLMCDANIEL
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. Re: new panel for new home

Originally Posted by NEC
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

6. NEC
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Re: new panel for new home

Originally Posted by JLMCDANIEL
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. Re: new panel for new home

Originally Posted by NEC
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

8. NEC
Banned Rank 2
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Re: new panel for new home

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

9. Banned Rank 2
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Location
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Re: new panel for new home

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

10. Re: new panel for new home

Perhaps a lot of grow lights?
Jack

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