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#6462 - 07/12/09 03:44 AM V/D and the NEC
gfretwell
Unregistered


We all know voltage drop is just a fine print note but there is a guy in this month's magazine advocating that it should be code. Any thoughts?

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#6463 - 07/12/09 09:08 AM Re: V/D and the NEC [Re: ]
John Desjardins Offline
Mechanic Member

Registered: 08/07/03
Posts: 306
Loc: Body=NC, Head & Heart=Florida
It is Code. Check Chapter 13 of the FBC. Has been for quite some time.
13-413.ABC.1 Voltage drop.

13-413.ABC.1.1 Feeders and customer-owned service conductors. Feeder and customer-owned service conductors shall be sized for a maximum voltage drop of 2 percent at design load.

13-413.ABC.1.2 Branch circuits. Branch circuit conductors shall be sized for a maximum voltage drop of 3 percent at design load.

I've been saying this for a long time. You need to stop thinking that the NEC is the Electrical Code for Florida. It is not. It is the Standard that we use. The Electrical Code is in the Florida Building Code. There is a lot of stuff there and if you haven't read it you've been missing a lot.

Look at Chapter 3,7,13 to start

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#6464 - 07/12/09 01:42 PM Re: V/D and the NEC [Re: John Desjardins]
gfretwell
Unregistered


I was really referring to the NEC in this case.

I do think Florida should get all the "electrical" things in the "electrical" chapter, just for simplicity but that is counter intuitive when you are talking about the government isn't it.

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#6465 - 07/12/09 05:18 PM Re: V/D and the NEC [Re: ]
Ruben Rocha Offline
Senior Member
*****

Registered: 05/24/00
Posts: 767
Don't forget we have a energy code also.
And lest we forget the mechanical code that has some electrical requirements.
And ADA
And????

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#6466 - 07/12/09 07:35 PM Re: V/D and the NEC [Re: Ruben Rocha]
John Desjardins Offline
Mechanic Member

Registered: 08/07/03
Posts: 306
Loc: Body=NC, Head & Heart=Florida
Yes I was siting the Energy Code above for V/D

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#6467 - 07/12/09 08:35 PM Re: V/D and the NEC [Re: John Desjardins]
Ruben Rocha Offline
Senior Member
*****

Registered: 05/24/00
Posts: 767
Yea,it just goes on and on John.
The days of using just the NEC are gone today.
Just my opinion!
Also don't forget most AHJ's also use the UL White book.
OMG!!!! another reference

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#6468 - 07/13/09 07:57 AM Re: V/D and the NEC [Re: Ruben Rocha]
Bryan Holland Offline

Secretary
*****

Registered: 10/05/04
Posts: 1622
Loc: City of North Port
I wouldn't mind VD becoming a mandatory requirement in the NEC as I do think it is important, however I am not sure it fits into the purpose of the code. Then again, there are many sections of the code which are not exactly a pure life and property safety requirement.

Perhaps they should split the code up into three general categories.

1. MUST DO
2. SHOULD DO
3. CAN DO

Maybe that isn't such a good idea...
_________________________
Bryan P. Holland, MCP

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#6471 - 07/13/09 01:51 PM Re: V/D and the NEC [Re: Bryan Holland]
gfretwell
Unregistered


I do believe Florida could incorporate all of these standards into one "electrical" code. I suppose we might eventually get used to looking in a half dozen books to size a feeder but that is certainly not the easy way to do it. When you add the 200 or so of separate interpretations the various AHJs have to the codes as written this is far from a uniform place for a contractor to work in. You need a GPS connected to your code book software to apply it.

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#6472 - 07/13/09 02:04 PM Re: V/D and the NEC [Re: ]
Rob Barbee Offline
Mechanic Member
***

Registered: 06/24/08
Posts: 120
Loc: Pinellas County
Originally Posted By: gfretwell
You need a GPS connected to your code book software to apply it.


The wheels are turning now! My million dollar idea! (or yours but I am stealing it!)
_________________________
Rob
Electrical Inspector

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#6475 - 07/13/09 10:49 PM Re: V/D and the NEC [Re: Rob Barbee]
gfretwell
Unregistered


This discussion does prompt an interesting question. How many of you require V/D calculations when plans are submitted?

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