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  #1  
Old 3/24/18, 10:45 PM
Steven Tuch Steven Tuch is offline
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Default Aluminum wire question

Hi, Does all single strand aluminum wire only have thermoplastic insulation? Or is there older aluminum wiring with cloth insulation? Also, do you ever find just one wire in a panel that is aluminum, perhaps from an upgrade in the 70's, or is it usually all or none?



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  #2  
Old 3/24/18, 11:21 PM
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Jeffrey R. Jonas Jeffrey R. Jonas is online now
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Default Re: Aluminum wire question

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Originally Posted by stuch View Post
Hi, Does all single strand aluminum wire only have thermoplastic insulation? Or is there older aluminum wiring with cloth insulation? Also, do you ever find just one wire in a panel that is aluminum, perhaps from an upgrade in the 70's, or is it usually all or none?
Yes... Thermoplastic only. Cloth covered would be "Tinned Copper".
One, or multiple, or all. Could be any of the above. In my area, I rarely find all, but it does happen. Usually just one or a few.



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  #3  
Old 3/24/18, 11:28 PM
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Larry Kage, CMI Larry Kage, CMI is offline
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Default Re: Aluminum wire question

What JJ said....^^^^^^^^^^




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  #4  
Old 3/25/18, 10:17 AM
Steven Tuch Steven Tuch is offline
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Default Re: Aluminum wire question

Thanks for the info. Appreciated.



Steve Tuch
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  #5  
Old 3/25/18, 11:57 AM
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Chuck Evans Chuck Evans is offline
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Default Re: Aluminum wire question

Good questions, great answers.



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  #6  
Old 3/26/18, 8:16 AM
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Default Re: Aluminum wire question

Very rarely have I encountered AL with cloth jacket insulator from residential home inspections and have photos, 2 or 3, on other HHD's to support this. The conductors were not tinned copper.
I will try to post them when I have time.



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  #7  
Old 3/26/18, 8:49 AM
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Bradley K. Toye, CMI Bradley K. Toye, CMI is online now
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Default Re: Aluminum wire question

Quote:
Originally Posted by ryoung7 View Post
Very rarely have I encountered AL with cloth jacket insulator from residential home inspections and have photos, 2 or 3, on other HHD's to support this. The conductors were not tinned copper.
I will try to post them when I have time.
I will be waiting patiently for those photos.



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  #8  
Old 3/26/18, 11:30 AM
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Default Re: Aluminum wire question

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Originally Posted by btoye View Post
I will be waiting patiently for those photos.
Don't hold your breath!



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Owatonna, Minnesota



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  #9  
Old 3/26/18, 11:52 AM
Erik Schmidt Erik Schmidt is online now
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Default Re: Aluminum wire question

Not Robert, but here goes anyway, most of the AL wiring I find has cloth sheathing, all has plastic insulation on the wires.
Yes I occasionally find one or two added AL wires in older houses, one way to tell is that all AL wire has a ground conductor, all the NM tinned copper I have seen had no ground conductor and rubber insulation over the wire, or it was knob and tube.
Once you have seen both tinned copper and AL you won't mistake one for the other.
Almost all the homes with AL I find have had copper wiring added after, like basement development, kitchen upgrade, no one doing any wiring is going to use AL if they don't have to.
Attached Thumbnails
Aluminum wire question-aluwiring-1-jpg  



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East Side Home Inspection
Edmonton Alberta
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Last edited by eschmidt; 3/26/18 at 12:03 PM..
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  #10  
Old 3/26/18, 12:37 PM
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ROBERT YOUNG ROBERT YOUNG is online now
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Default Re: Aluminum wire question

Thanks Eric.

I have shown the images when mentoring.
I do not bother on NACHI MB any more. Why bother.



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Montreal Home Inspection Services Inc.
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  #11  
Old 3/26/18, 12:38 PM
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Bradley K. Toye, CMI Bradley K. Toye, CMI is online now
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Default Re: Aluminum wire question

Quote:
Originally Posted by eschmidt View Post
Not Robert, but here goes anyway, most of the AL wiring I find has cloth sheathing, all has plastic insulation on the wires.
Yes I occasionally find one or two added AL wires in older houses, one way to tell is that all AL wire has a ground conductor, all the NM tinned copper I have seen had no ground conductor and rubber insulation over the wire, or it was knob and tube.
Once you have seen both tinned copper and AL you won't mistake one for the other.
Almost all the homes with AL I find have had copper wiring added after, like basement development, kitchen upgrade, no one doing any wiring is going to use AL if they don't have to.
Good example, but that's not cloth wiring. That's a rayon jacket. We are looking for AL with cloth covering on the individual conductors, which I do not think exists.



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  #12  
Old 3/26/18, 1:08 PM
Erik Schmidt Erik Schmidt is online now
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Default Re: Aluminum wire question

Yup, but the same question gets asked again and again, not everyone gets that sheathing is not insulation. It is hard to tell what the poster is asking about did the poster see sheathing, or did the poster actually look at what the wires were insulated with. And Rayon is a textile, cloth is made from textile, if A = B and A = C, then B = C. I am also totally in awe of Brad's ability to perform chemical analysis from a picture, your talents are under utitized here, you could be a one man analysis lab.



Erik Schmidt


East Side Home Inspection
Edmonton Alberta
780 477 2666
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  #13  
Old 3/26/18, 1:16 PM
Bradley K. Toye, CMI's Avatar
Bradley K. Toye, CMI Bradley K. Toye, CMI is online now
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Default Re: Aluminum wire question

Quote:
Originally Posted by eschmidt View Post
Yup, but the same question gets asked again and again, not everyone gets that sheathing is not insulation. It is hard to tell what the poster is asking about did the poster see sheathing, or did the poster actually look at what the wires were insulated with. And Rayon is a textile, cloth is made from textile, if A = B and A = C, then B = C. I am also totally in awe of Brad's ability to perform chemical analysis from a picture, your talents are under utitized here, you could be a one man analysis lab.
Are all of you Canadians like this?



Brad K Toye
ITC/FLIR Level I Building Investigation Thermographer
FL Certified Building Contractor CBC034303
FL Certified Home Inspector HI 391
FL Certified Mold Assessor MRSA 589

727-403-5029
Lecsi2@gmail.com
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  #14  
Old 3/26/18, 2:06 PM
Erik Schmidt Erik Schmidt is online now
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Default Re: Aluminum wire question

Quote:
Originally Posted by btoye View Post
Are all of you Canadians like this?
I'd like to say yes, but probably not.



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East Side Home Inspection
Edmonton Alberta
780 477 2666
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  #15  
Old 3/26/18, 2:20 PM
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Marc A. Goldenberg Marc A. Goldenberg is offline
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Default Re: Aluminum wire question

Quote:
Originally Posted by btoye View Post
I will be waiting patiently for those photos.
NEVER to be seen!



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