insulation

kandi

laying insulation over wiring in attic

gregzoll

Okay.

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AngelArs

I hope that wiring isn't K&T.

Insulation around K&T is a big no-no

joecaption

So what's the question?

AngelArs

I think she thinks she's on twitter

DangerMouse

Once again, this is a forum, not google, populated by REAL people willing to answer QUESTIONS when asked. Posts like yours will either go unanswered or our members will be irked by your lack of common sense and reply with rude or silly answers. If you have a question, please post it as such.

Thank you

DM

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to see some of my original magic tricks and trick boxes!

Fix'n it

my attic is full of both. has been for decades. i have yet to see a problem with it. and i am still using much of it, for now.

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AngelArs

Consider yourself lucky. You might want to do yourself a favor and revisit the issue. It's a well known fire problem K&T is an air insulated system and requires surrounding air to keep it cool. Most insulation packaging warns about this. Most insurance companies won't pay out if its discovered that's how the fire started. Here's a quick reference talking about it.

Fix'n it

i know all about it. and i am doing something about it, 1 room at a time. but the K&t in this house is pretty high quality. the sheathing is in darned good shape. and the wire is heavy gauge.

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gregzoll

Industrial grade huh. Of course, why can't they make stuff to last like they did back in the day, when unions were not involved, and there was pride in workmanship.

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AngelArs

I'm glad that you're aware of this matter and most importantly, that you're taking steps to correct it. Just to clarify, this has nothing to do with the condition of the K&T, or it's gauge. This is purely about the wire 'suffocating' under insulation (there is no surrounding air to cool it). I know it's a pain in the butt to replace it (I'm in the process of replacing mine too) with modern day wiring, but on the bright side you only have to do this once

Fix'n it

actually, no, its not.

its about the "load" on that wire. when there is too many things running on that wire, the wire gets hot. when the wire gets very hot, it makes things around it very hot. whether or not a fire starts because of this, depends on how close and what type of combustibles are around that wire.

sure, if there is no "suffocation" going on, chances of a fire are lower.
if the wire is not "overloaded", then a fire will not happen.

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AngelArs

Tell that to the United States National Electric Code (NEC). Your reasoning may be true in a perfect world but that discounts the whole purpose for insulation, which is to isolate heat in or out, in this case inside the wiring jacket made out of old flammable cotton cloth. No one here is talking about over loading the wires capacity. The whole reason why K&T was suspended in air was so that it could dissipate heat. Not necessarily heat from a overloaded circuit, but just normal dally heat from normal electric current. When you take away that heatsink (in this case the air) and surround the wire with insulation, the knob and tube wires are no longer suspended in air, and naturally will become hotter than intended. Anyway I'm not here to debate the facts which should seem obvious. I was only trying to help. Once a fire starts you can debate your opinion with it, and the insurance company. Speaking of the NEC, it doesn't appear that you were aware that the United States National Electric Code (NEC) section 324-4, actually forbids the use of loose, blown-in, or expanding foam insulation over Knob and Tube wiring. I wonder why?

Gary in WA

Any other questions, kandi?

Gary

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