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TOPIC: Knob & Tube Question

Re: Knob & Tube Question 11 years 6 months ago #39810

Casey...

My feelings are hurt! (Enough said)! LOL!!!

Yes... K&T has a cloth mesh jacket,

No... K&T does not (normally) have rubberized insulation,

No... K&T should never be bare wire,

Yes... that appears to be tinned copper,

No... That is not aluminum,

Yes... Aluminum has a "Plastic" type insulation,

Yes... I have seen a home re-wired utilizing the old "Knobs" and "Tubes" with THHN and no grounding wire !!! Friggin' Harry !!!


Jeff according to the link I provided, www.inspectapedia.com/electric/Knob_and_Tube_Wiring.htm , K&T will have a rubberized cloth insulation, not just cloth. Although asphalt-saturated cotton cloth was used in the beginning, rubber became common.

Mike, yes, you are correct. (I didn't read your link). I was just giving a simplified answer to Casey (Based on "real world" for "our" area) as this thread was contradicting itself. I should have been more specific. My "does not have rubberized insulation" actually referred to "without the mesh covering", such as newer wire (conductors). Whether "rubberized" or "asphalt impregnated", K&T always had a "cloth" or "mesh" covering, and was never "bare wire". Hope that didn't confuse Casey even more. If it did, "he knows where I live" !!! :)
 


Thanks for clarifying Jeff, I was trying to learn also, so it helped me.

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Re: Knob & Tube Question 11 years 6 months ago #39811

Nice picture Jeff..."Harry" strikes again!

All the K&T I've seen has had a cloth covering on it.  Most of the time it's degraded, brittle, patched with electrical tape, etc...in other words, it's just not a good system anymore. 

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Re: Knob & Tube Question 11 years 3 months ago #41851

First insulation was asphalt-saturated cotton cloth, then rubber became common
en.wikipedia.org/wiki/Knob_and_tube_wiring :)

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Re: Knob & Tube Question 11 years 3 months ago #41856

Marcel, you should start your own site:  "Marcel-a-pedia, for the inspector that has all the questions, we've got the answers!"

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Re: Knob & Tube Question 11 years 3 months ago #41861

Great idea Casey! It could be Marcel's path to Internet Million's !!! :)

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Re: Knob & Tube Question 11 years 3 months ago #41866

Hey, you never know anymore!  Just have to be the best one at it...very few any better than our Marcel!  :)

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