Minimum # of circuits (residential)

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kendog

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Good morning everyone. I was wondering if you guys could help me out. I work at a modular home factory and we were looking at some cost ssving ideas. Right now we are using the 180VA rule for laying out our electrical circuits and figuring out the minimum # of circuits required for the dwelling (residential). I brought up using the residential formula for figuring out the minimum # of circuits required and was wondering if anyone in your area is requiring the use of the 180VA rule for residential. Any help would be greatly appreciated.
 
Re: Minimum # of circuits (residential)

No. The 180VA rule for dwellings is too conservative. Using the 3VA per square foot is more adequate.

1,000 ft? x 3VA = 3,000 VA / 120V / 15A = 2 required circuits.

OR

120V x 15A = 1,800VA / 3VA = 600 ft? per circuit.
 
Re: Minimum # of circuits (residential)

Thanks for replying so quick. I agree, it just being in this industry as long as I have, I learned one thing. States adopt a lot of different codes and amendments. I am just trying to cover all my bases.
 
Re: Minimum # of circuits (residential)

I always thought the 180va was for "other than" Dwelling unit receptacle requirements....180va per yoke. ex. 20amp(120v)=2400va/180va=13.3 0r 13 20amp receps. per circuit.
 
Re: Minimum # of circuits (residential)

yes per the NEC I was wondering if there is any local or state requirements in your area that require using the 180 VA rule for residential. Sorry for the confusion
 
Re: Minimum # of circuits (residential)

Originally posted by georgestolz:
Allen, 3 kva per square foot seems a bit excessive to me.
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Just a tad.
pic.php
 
Re: Minimum # of circuits (residential)

Kendog,
go with the 3va/sq.ft.

What do you think they do at Marlette(Clayton)??

BTW, do you guys use a tunnel jig, or a flip jig?
 
Re: Minimum # of circuits (residential)

TY did you work for marlette at one time? The onlyt reason I ask is cause I use to work there for a couple of years. We don't have any kind of floor jig here our facility is to small. Our Electrical work is done in the walls and the ceiling.
 
Re: Minimum # of circuits (residential)

Originally posted by kendog:
TY did you work for marlette at one time? The onlyt reason I ask is cause I use to work there for a couple of years. We don't have any kind of floor jig here our facility is to small. Our Electrical work is done in the walls and the ceiling.
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Wow :eek: You actually lasted a couple of years there?
We probably know some of the same people.

How is Losertown, I mean Lewistown? The unofficial Heroine capitol of the US.
 
Re: Minimum # of circuits (residential)

getting worse every day. I moved to Port Royal had to get away from all the BS. Yeah, I lasted for more then a couple I was there from 98 to 2005. I know, thats bad.
 
Re: Minimum # of circuits (residential)

Originally posted by allenwayne:
The 3kva/sq. ft. is all you need but it is bare minimum.
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I don't agree that it's the bare minimum at all. Read what Bryan said. 3 VA/sq-ft is very conservative. It is more than adequate for a residential calculation.

[ February 23, 2006, 11:37 AM: Message edited by: peter d ]
 
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