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Price for copper wire to sub panel? Paul Ferguson 06-14-2006
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Posted by Paul Ferguson on June 14, 2006, 1:31 pm
I am having a sub panel put into an attached garage. It will be fed
from a 100 amp breaker in one of my house breaker panels. The wire run
will be about 100 feet thru crawlspace and connecting breezeway.

The electrician wants to use AWG 2 aluminum wire. I prefer copper but
know it is more expensive, especially with the recent copper price
rises. He is going to check on what the additional cost will be to go
to copper wire to the sub panel.

Can anyone provide me with a ballpark estimate of the cost of aluminum
versus copper wire for a 100 amp run over 100 feet?

PaulF


Posted by on June 14, 2006, 1:48 pm
wrote:

>The electrician wants to use AWG 2 aluminum wire.
He should be using #1al for 100a (NEC 310.16) or #2 cu (#3 cu if you
can get it).
There is really no compelling reason not to use aluminum if it is
sized properly.


Posted by Paul Ferguson on June 14, 2006, 2:08 pm
On Wed, 14 Jun 2006 13:48:07 -0400, gfretwell@aol.com wrote:

>wrote:
>
>>The electrician wants to use AWG 2 aluminum wire.
>He should be using #1al for 100a (NEC 310.16) or #2 cu (#3 cu if you
>can get it).
>There is really no compelling reason not to use aluminum if it is
>sized properly.


Thanks. Maybe he is derating it for being a single dwelling. He says
local code allows no 2 Al.

He got the prices -- No. 2, 4 wire Al wire is $1.32/ft and No. 4, 4
wire copper is $4.82/ft.

I decided to go Al.

PaulF



Posted by RBM on June 14, 2006, 4:18 pm
When you say "wire" do you mean single conductor or are you referring to a
cable? I just purchased #4 THHN copper today for 1.25 per foot, for cut
wire. A roll of 500 ft was cheaper



> On Wed, 14 Jun 2006 13:48:07 -0400, gfretwell@aol.com wrote:
>
>>wrote:
>>
>>>The electrician wants to use AWG 2 aluminum wire.
>>He should be using #1al for 100a (NEC 310.16) or #2 cu (#3 cu if you
>>can get it).
>>There is really no compelling reason not to use aluminum if it is
>>sized properly.
>
>
> Thanks. Maybe he is derating it for being a single dwelling. He says
> local code allows no 2 Al.
>
> He got the prices -- No. 2, 4 wire Al wire is $1.32/ft and No. 4, 4
> wire copper is $4.82/ft.
>
> I decided to go Al.
>
> PaulF
>
>



Posted by Paul Ferguson on June 14, 2006, 9:09 pm
On Wed, 14 Jun 2006 16:18:53 -0400, "RBM" <rbm2(remove
this)@optonline.net> wrote:

>When you say "wire" do you mean single conductor or are you referring to a
>cable? I just purchased #4 THHN copper today for 1.25 per foot, for cut
>wire. A roll of 500 ft was cheaper


I did mean "cable" when I said "wire". The price quoted was for the
cable per foot.

PaulF

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