73 posts / 0 new
Last post
woodgreen
Knob & Tube Wiring

How dangerous is Knob & Tube Wiring to be left in a house? How does an electrician remove all old knob & tube wiring, in an existing lived in house?

JLMCDANIEL
Re: Knob & Tube Wiring

It is generally very old wiring, and the insulation is dried out and starting to crumble. It is dependent on air circulation around it for heat dissipation ,so you can't insulate.

Normally the electrician disconnects the wires from power, cuts some off but leaves most in place when rewiring.
Jack

Ernie_Fergler
Re: Knob & Tube Wiring
JLMCDANIEL wrote:

It is generally very old wiring, and the insulation is dried out and starting to crumble. It is dependent on air circulation around it for heat dissipation ,so you can't insulate.

Normally the electrician disconnects the wires from power, cuts some off but leaves most in place when rewiring.
Jack

In central Pa, you will find houses having K & T wiring, and blown in insulation covering the wire. i just shake my head:mad:

misfitter
Re: Knob & Tube Wiring

it is not used anymore for safety and installation reasons. it caused fires. And there are better materials for instalatin now. When the electrician runs new wiring, and this is a must to meet code, you can salvage the old knobs and find other uses for them. it is a pretty cool piece of history of that house. Good luck. Proccess of elimination.

Debra
Re: Knob & Tube Wiring

I just watched the east Boston project episode again. The master electrician there said they needed to replace that knob and tube wiring for insulation purposes. I'm guessing he wanted to meet some other requirements too, like code and energy efficiency. Looks like K&T is out for good reason.

Ernie_Fergler
Re: Knob & Tube Wiring
debbysewn wrote:

I just watched the east Boston project episode again. The master electrician there said they needed to replace that knob and tube wiring for insulation purposes. I'm guessing he wanted to meet some other requirements too, like code and energy efficiency. Looks like K&T is out for good reason.

Lacking a proper ground path and air splices were the two main reasons that made K & T obsolete, would be my guess. And add in wire vastly undersized for todays needs as well.

Debra
Re: Knob & Tube Wiring
Ernie_Fergler wrote:

Lacking a proper ground path ...add in wire vastly undersized for todays needs as well.

That would get my vote for replacement, not being grounded and not able to give me the power I needed.

Ernie_Fergler
Re: Knob & Tube Wiring

Let us remember if the K & T was installed say back around 1920, to pick a year out of the air. Well what exactly did a then homeowner have to energize back then? A radio and a lamp.:D

Debra
Re: Knob & Tube Wiring
Ernie_Fergler wrote:

Let us remember if the K & T was installed say back around 1920, to pick a year out of the air. Well what exactly did a then homeowner have to energize back then? A radio and a lamp.:D

Good point.

Ernie_Fergler
Re: Knob & Tube Wiring
debbysewn wrote:

Good point.

How did they survive?:D

Debra
Re: Knob & Tube Wiring

I know how they survived:> They smoked, did projects like quilting or knitting, chopped wood, cooked more difficult meals and read. They had a lot more kids because they probably weren't so stressed out in the bedroom because they were fighting over the remote.

I was without power for a week in December and I nearly went out of my mind-- no vacuum, no washing machine, no dishwasher, only the fire place for heat and 2 kids at home to entertain. It's a good thing my sister's puppies were here or I think my boys and our dog would have been bored out of their minds. Battery powered radio was the only thing we had and I limited that to only a few hours.

Pages

Sponsored Stories

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.