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Old 01-26-2013, 12:56 PM  
FlyingTexan
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It does go to say on the next page that it observed wiring is a mix of Romex and antiquated Knob and Tube. Is all K&T copper? does that make things better or worse?



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Old 01-26-2013, 01:12 PM  
Wuzzat?
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Using the search terms

cost square feet rewire house

and picking one quote from each of the 10 pages returned by this search to try to get more randomness in my choice of values, I now get

sq ft kilobucks $/sq ft
2800 6 2
1800 4 2
1600 4 2
2800 7 3
2400 6 3
1000 3 3
2000 8 4
2800 12 4
2000 10 5
800 4 5
2800 15 5
1000 8 8
1000 8 8
1800 15 8
1000 10 10
1000 10 10
1000 12 12
900 12 13
1000 16 16
1000 17 17
1000 17 17
1000 17 17

8 =avg.
6 =median
5 =mode
3 =1st quartile
12 =3rd quartile
22 =number of samples

half the cases are between
3 $/sq ft
and
12 $/sq ft

Getting enough quotes for each subcategory of this (type of wiring, number of outlets, age of house, ZIPcode, etc.) will be very difficult unless lurking electricians step forward with their historical data on the rewire jobs that they did.



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Old 01-26-2013, 11:45 PM  
dthornton
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Not positive, but I believe they stopped using knob and tube before they started using aluminum. K&T is inherently safe as long as the insulation remains intact, because the hot and the neutral wires are separated by space. However, that type of wiring has no ground. I have a house built in 1890 which still has some K&T. I have discovered that the insulation has cracked off of some of the wring, so I'm in the process of replacing it. As far as your wiring, I'd ask a local electrician to take a look at what you have and advise you. Aluminum wire used to be used extensively in mobile homes because it was cheap; and, aluminum is an excellent conductor. The problem with aluminum is that when you connect it with copper, there is a bimetallic reaction and the aluminum will corrode. Corrosion causes resistance, which can cause a fire. Outlets and switches made to connect to aluminum wire will (or should) be marked CO/ALR.

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Old 01-27-2013, 05:46 AM  
speedy petey
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Quote:
Originally Posted by FlyingTexan View Post
The report says the following;

Service Entrance & Panels cont

SERVICE WIRING: Observed service type of wiring is aluminum

FEEDER WIRING: Observed feeder type of wiring is copper

Was I mistaken in thinking the service wiring was wiring that ran throughout the house?
No, the service wiring is what feeds the house. From the utility drop, to the meter, then to the panel.
In most places around the country this is aluminum wiring.

Feeder wiring is between the main panel/disconnect/service and other panelboards. NOT surprisingly your home inspector used the wrong terminology. That is a pretty substantial mistake in terms.

Branch circuit wiring is the wiring run throughout the house.
AL wiring here is not good. It will not automatically burn down you house, but it MUST be dealt with properly.
IMO K&T is the same. It's OK in pristine condition and without any insulation (the pink/yellow/blown-in kind) around it. One you mess with it or put insulation around it it typically becomes a problem.
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Old 01-27-2013, 07:52 AM  
Wuzzat?
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Here's possibly a better search, and it was easier:

using the search terms

cost rewire house "per outlet"

$/outlet
82 =avg.
70 =median
120 =mode
30 =ratio, high sample value to low sample value
20 =number of samples

half the cases are between
38 $/outlet
and
105 $/outlet
with a max range of $10 to $300 per outlet.

A histogram of prices tells yet another story
10 to 75 xxxxxxxxxxxx
76 to 141 xxxxxx
142 to 207 x
208 to 273
274 to 339 x

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Old 01-27-2013, 10:18 AM  
speedy petey
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Quote:
Originally Posted by Wuzzat? View Post
Here's possibly a better search, and it was easier:

using the search terms

cost rewire house "per outlet"

$/outlet
82 =avg.
70 =median
120 =mode
30 =ratio, high sample value to low sample value
20 =number of samples

half the cases are between
38 $/outlet
and
105 $/outlet
with a max range of $10 to $300 per outlet.


A histogram of prices tells yet another story
10 to 75 xxxxxxxxxxxx
76 to 141 xxxxxx
142 to 207 x
208 to 273
274 to 339 x
So in a profoundly long winded way you are telling us that the range is too great to even guess at a price.
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Old 01-27-2013, 01:43 PM  
Wuzzat?
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Quote:
Originally Posted by speedy petey View Post
So in a profoundly long winded way you are telling us that the range is too great to even guess at a price.
Early on, you yourself guessed at four prices.

With these summary stats the OP and lurkers may at least know how much is too much to pay, or wonder why they paid so little.

It does seem that counting outlets rather than counting sq. ft. will give a better answer.
I finally plotted sq. ft vs. rewire cost and found that there is almost zero correlation.
There may be more in these stats but I don't see it yet.

Relax. You are not paying for my advice. Go have a beer with Mr. Port, and more than one if it's absolutely necessary.

In all fairness, I should say that even engineering companies don't like stats - it's too much like quality control.
It's too bad, because this branch of science is very good at detecting lies, waste, fraud, out-of-control production processes, etc., in addition to evaluating how effective or dangerous medical treatments are.
Even "60 Minutes" doesn't seem to use it as often as they should.

And speaking of quality control, if the cost of living in the US varies in only a 7:12 ratio, Austin:Honolulu, why is the cost of doing the same thing so different in these United States? Huh?
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Old 01-27-2013, 02:27 PM  
speedy petey
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Quote:
Originally Posted by Wuzzat? View Post
E

Relax. You are not paying for my advice. Go have a beer with Mr. Port, and more than one if it's absolutely necessary.
These are the times I actually wish I did drink.
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Old 01-27-2013, 02:57 PM  
Wuzzat?
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Can't let this go. . .
New search, new strategy,

For rewiring a house from 1100 to 3700, didn't get many samples but got excellent correlation between house size and price.

$/sq. ft.

4.9 =average
4.8 =median
8 =number of samples
0.94 =correlation, sq ft & kilobucks

half the cases are between
4.2 $/sq ft
and
5.6 $/sq ft



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