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Price for copper wire to sub panel? Paul Ferguson 06-14-2006
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Posted by hallerb@aol.com on June 14, 2006, 10:44 pm
I see your point properly sized the voltage drop should be the
same......

my point is aluminum wire may be a issue at resale

copper isnt that much more, a few hundred on a fairly big job. If your
paying to have it done the install labor is likely a large cost, which
makes a few hundred as a percentage of the job, a minor issue...

I guess I just dont like anything but copper for wiring, its the ideal
product.


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Posted by on June 14, 2006, 11:03 pm
wrote:

>my point is aluminum wire may be a issue at resale
Only if the home inspector is a moron.
There is absolutely nothing wrong with aluminum if it is used in
aluminum lugs, whitch they all are these days in these sizes. The
aluminum hysteria was caused by a different alloy in a totally
different application using binding screws, not lugs.

Personally I bet they start trying to sell us aluminum for 15/20a
branch circuits again if copper prices keep rising. That was how we
got the stuff the first time.

Posted by RBM on June 15, 2006, 7:11 am
I certainly prefer to use copper, although I've never had problems with
aluminum in larger sizes. Right now with copper prices up around 600%, there
is a huge difference in price between the two. If the price doesn't come
down, I think alot of people are going to suddenly see aluminum in a
different light




>I see your point properly sized the voltage drop should be the
> same......
>
> my point is aluminum wire may be a issue at resale
>
> copper isnt that much more, a few hundred on a fairly big job. If your
> paying to have it done the install labor is likely a large cost, which
> makes a few hundred as a percentage of the job, a minor issue...
>
> I guess I just dont like anything but copper for wiring, its the ideal
> product.
>



Posted by Doug Miller on June 15, 2006, 12:13 pm

>All conductors have voltage drop but alunimum is much worse than
>copper.
>
For the same size conductor, yes -- but you _don't_use_ the same size
conductors with aluminum that you do with copper.

The difference in voltage drop in a copper conductor sized for 100A, and an
aluminum conductor sized for 100A, is negligible.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.

Posted by on June 14, 2006, 9:49 pm
On Wed, 14 Jun 2006 23:36:50 GMT, spambait@milmac.com (Doug Miller)
wrote:

>Per NEC 310.16, with 90-deg C insulation (e.g. THHN) #2 Al is OK for 100A.

...but the lugs are only rated 75c

You also can't use the "dwelling" exception 310.15(B)(6) if this is
not the sole feeder/service to the home. Sub-panels have to use 310.16

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