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canuk
Re: Knob & Tube Wiring

.... and not a very pleasant surprise.;)

lmills148
Re: Knob & Tube Wiring
Ernie_Fergler wrote:

Nothing like doing a side job as a favor and when you show up the first thing you notice is the 60 amp meter base. And the favor is wiring for a 16000 BTU a.c.:mad:

..but the hvac guy said it would work ..

canuk
Re: Knob & Tube Wiring
lmills148 wrote:

..but the hvac guy said it would work ..

LOL ....:D

djohns
Re: Knob & Tube Wiring
Ernie_Fergler wrote:

Nothing like doing a side job as a favor and when you show up the first thing you notice is the 60 amp meter base. And the favor is wiring for a 16000 BTU a.c.:mad:

Reminds me of the time that my sister asked me to do some wiring on a house that she and her husband were going to
" flip " . She wanted to install an electric range , water heater , and electric central heat . I took her outside and showed her the 100 amp meter base . Sorry sis . Ain't gonna happen . :D

Ernie_Fergler
Re: Knob & Tube Wiring
lmills148 wrote:

..but the hvac guy said it would work ..

I worked in a house where a large a.c. was purchased from a Loews store. The salesman stated "don't worry this unit will fit into all windows, its never a problem". Well it was a problem.:)
I still chuckle about that one.

mstone03
Re: Knob & Tube Wiring

Alot of good advise here. I just bought a house with K&T all through ouy. I originaly thought is was disconected, but my home inspector told me otherwise. It has a mixture of Romex and K&T. First things first to rewire. The first floor will be no big deal because it has a full basement, but Im trying to figure a way to run it upstairs with out damaging the plaster that was recently repaired. Any suggestions?
And Myth Busters did test the toaster/hair dryer in the tub. Blew the breaker everytime, never producing a lethal shock. It was pretty cool..

Re: Knob & Tube Wiring
mstone03 wrote:

Alot of good advise here. I just bought a house with K&T all through ouy. I originaly thought is was disconected, but my home inspector told me otherwise. It has a mixture of Romex and K&T. First things first to rewire. The first floor will be no big deal because it has a full basement, but Im trying to figure a way to run it upstairs with out damaging the plaster that was recently repaired. Any suggestions?
And Myth Busters did test the toaster/hair dryer in the tub. Blew the breaker everytime, never producing a lethal shock. It was pretty cool..

I hope you never try and replicate that test in real life. Yes GFI breakers and outlets do work very well. But being a the triping part is a mechanical devise there is always a chance they will malfunction.

In getting wires to the second floor. I have always tried near cold or waist water plumbing pipe risers. I have also ran them in closets that are above each other and then boxed them in. Be careful not to disturb the old knob and tube wiring as when you touch it the old insulation crumbles of and that is what causes problems

doitmyselfer
Re: Knob & Tube Wiring

I recently replaced all the knob and tube wiring in my house. I found where the wiring went up through the walls from the basement and used the old wires to pull up new romex. I pulled up the necessary 2nd floor and attic floorboards to route the wiring to the overhead light locations. I'm not sure about other homes, but all the knobs, tubes and splices were in the floor joists, not the walls, making it really easy to pull the wires through the walls from the basement and to the switches. The only downside to my technique was that I disconected all the knob and tube wiring and we lived without overhead lights and some outlets for awhile until I had everything hooked up.

Ernie_Fergler
Re: Knob & Tube Wiring
Ravens53 wrote:

I hope you never try and replicate that test in real life. Yes GFI breakers and outlets do work very well. But being a the triping part is a mechanical devise there is always a chance they will malfunction.

In getting wires to the second floor. I have always tried near cold or waist water plumbing pipe risers. I have also ran them in closets that are above each other and then boxed them in. Be careful not to disturb the old knob and tube wiring as when you touch it the old insulation crumbles of and that is what causes problems

Was any of the mythbuster guys in the tub when they replicated that toaster trick?:D

sbillvic
Re: Knob & Tube Wiring

I am a master electrician and I know what code says about grounding BUUUUUT. I hear knob and tube is unsafe because it has no ground so it can't be used in places requiring a GFCI. A GFCI will work perfectly fine without a system ground. Almost all appliances, vacuum cleaners, and for that matter almost everything except some power tools come with only a 2 prong cord. If it was unsafe for 2 wire why is nearly everything made for 2 wire plug. Having a 3 wire system is great and needed for steel cased appliances and tools but for modern day use 2 wire will suffice.

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