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#95399 - 09/12/05 03:42 PM Service Entrance Wires in Knoxville TN.
Bomzin Offline
Member

Registered: 03/25/04
Posts: 27
Loc: Utah
I was having a discussion with someone on a differant board and it was brought up that Aluminum wire could not be used to feed from service to panel. It was a not an electrician. Is this true and what is the reasoning behind it. Here in the state of Utah it is all that is used and don't see any problems with it when used correctly.

He also stated that for any home that is going to have central AC they had a 200 amp minimun on service requirments. Regardless of your load calculations.

Whats the scoop on this.
Thanks Bomzin

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#95400 - 09/12/05 03:57 PM Re: Service Entrance Wires in Knoxville TN.
Tiger Offline
Member

Registered: 05/04/05
Posts: 714
Loc: Crystal Lake, IL USA
In my experience the issues of aluminum wiring and 200-amp minimum services are both local ammendments to the NEC by the AHJ, not Code issues.

Dave

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#95401 - 09/12/05 06:52 PM Re: Service Entrance Wires in Knoxville TN.
BigB Offline
Member

Registered: 03/31/04
Posts: 727
Loc: Tucson, AZ USA
I have been told various things by mis informed people as well. The last one was that #14 wire is no longer allowed in new construction. This same person was "helping" a friend with a 200 amp upgrade, they were at Home Depot buying a piece of 2" EMT for the overhead riser. (Our POCO requires IMC). I just smiled at them and said good morning.

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#95402 - 09/12/05 07:38 PM Re: Service Entrance Wires in Knoxville TN.
jw electric Offline
Member

Registered: 09/08/05
Posts: 108
Loc: Asheboro, NC
My granddad was a wise man. One of the few times that he spoke he told me that it is sometimes better to keep thy mouth shut and thought a fool than to open it and let it be known.

This is a good example to a good time to keep his mouth shut.
_________________________
Mike

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#95403 - 09/13/05 09:06 AM Re: Service Entrance Wires in Knoxville TN.
Bomzin Offline
Member

Registered: 03/25/04
Posts: 27
Loc: Utah
Ok so it looks like Tiger thinks this is true with local codes writing it in and possibly 2 that think this is mis information.

I see it as possible, Tiger do you know this to be true or just taking a guess? Who is AHJ?

ty
Neil

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#95404 - 09/13/05 09:22 AM Re: Service Entrance Wires in Knoxville TN.
Bomzin Offline
Member

Registered: 03/25/04
Posts: 27
Loc: Utah
Doh, Authority having juristiction , I knew that. Just put in an e-mail to the city inspector. Will post when I get info from the source.

Neil

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#95405 - 09/13/05 08:05 PM Re: Service Entrance Wires in Knoxville TN.
Larry Fine Offline
Member

Registered: 02/18/05
Posts: 684
Loc: Richmond, VA
I've seen homes with what was no doubt a greater current load in window A/C's than a central system would have provided.

Unless one is going all-electric, replacing several window units with a central system doesn't always need a service upgrade.
_________________________
Larry Fine
Fine Electric Co.
fineelectricco.com

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#95406 - 09/13/05 08:52 PM Re: Service Entrance Wires in Knoxville TN.
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
Larry You might be right in a practical sense because the window shaker load is hiding in the 3va per foot general lighting. Once you make it an HVAC load it has to be taken at nameplate value.
_________________________
Greg Fretwell

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#95407 - 09/14/05 11:03 AM Re: Service Entrance Wires in Knoxville TN.
markp Offline
Member

Registered: 04/12/04
Posts: 60
Loc: Kent, WA, USA
Really??? Aren't window shakers considered fastened-in-place equipment and therefore have to be tallied on a service calculation (that is assuming they were planned for when the electrician installed the service).
_________________________
Mark
Kent, WA

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#95408 - 09/14/05 05:11 PM Re: Service Entrance Wires in Knoxville TN.
Bomzin Offline
Member

Registered: 03/25/04
Posts: 27
Loc: Utah
Yes of course if the window unit were planned on you would have to consider it. Even after the fact it should be considerd.

The question still lies. If you do the math on a home in Knoxville and come up with only needing a 100 amp service or even a 125 but becuase you have electric range dryer and an AC unit you will be required to install a 200 amp service.

Also is aluminum wire ,SER, allowed or not from service to panel and if not what is the reasoning behind any of it .

Anyone from the city of Knoxville I mailed has yet to respond.

Just curious
Neil

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