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Having problems running wire up wall from basement TNelson 05-20-2006
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Posted by TNelson on May 20, 2006, 9:01 pm
Ok heres my problem. I am in an older row home, I would say its early
1900's. The studs are about 24" apart and between the top floor
and the main floor ceiling they have continuious flooring from one
room to the next threw-out the wall also.

The people before us put in a hot air vent to the upstairs bathroom by
cutting a hole into the basement ceiling into the wall cavity and is
letting the hair air travel all the way up the wall and into the
bathroom without any true duct working.

My problem is I drilled about a foot and a half from the basement duct
and the snake is still on the portion of wall with the hot air since
the snake finds its way all the way to the bathroom vent. Getting to
the other side of the stud isn't possible since the toilet is right
where I would need to start tearing everything up.

My question is the air that would occupy that space even remotely be
hot enough to cause issues if I take the wire up that portion of
wall?


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Posted by John Grabowski on May 20, 2006, 9:32 pm

> Ok heres my problem. I am in an older row home, I would say its early
> 1900's. The studs are about 24" apart and between the top floor
> and the main floor ceiling they have continuious flooring from one
> room to the next threw-out the wall also.
>
> The people before us put in a hot air vent to the upstairs bathroom by
> cutting a hole into the basement ceiling into the wall cavity and is
> letting the hair air travel all the way up the wall and into the
> bathroom without any true duct working.
>
> My problem is I drilled about a foot and a half from the basement duct
> and the snake is still on the portion of wall with the hot air since
> the snake finds its way all the way to the bathroom vent. Getting to
> the other side of the stud isn't possible since the toilet is right
> where I would need to start tearing everything up.
>
> My question is the air that would occupy that space even remotely be
> hot enough to cause issues if I take the wire up that portion of
> wall?
>


I guess that air space could be considered a plenum in which case
non-metallic (Romex) wiring should not be used. Usually metal conduit or
perhaps type MC cable is approved for plenums.

It sounds as though there aren't any fire stops to prevent flames and heat
from traveling up that wall quickly and spreading to the upper portion of
the house. This is not good.


Posted by Edwin Pawlowski on May 20, 2006, 9:42 pm

> It sounds as though there aren't any fire stops to prevent flames and heat
> from traveling up that wall quickly and spreading to the upper portion of
> the house. This is not good.

Millions of homes were built using balloon framing. Fire stops are
relatively new.



Posted by John Grabowski on May 20, 2006, 11:03 pm

>
> > It sounds as though there aren't any fire stops to prevent flames and
heat
> > from traveling up that wall quickly and spreading to the upper portion
of
> > the house. This is not good.
>
> Millions of homes were built using balloon framing. Fire stops are
> relatively new.
>
>

I've found that many of the balloon construction homes that I have worked in
have had fire stops added in the basement. Usually mortared-in bricks or
just cement has been placed on top of the sill plate up to the bottom of the
floor. In some cases drywall has been installed to block those spaces. It
seems at some point it was required to block those openings, at least in New
Jersey.


Posted by Colbyt on May 20, 2006, 9:38 pm

> Ok heres my problem. I am in an older row home, I would say its early
> 1900's. The studs are about 24" apart and between the top floor
> and the main floor ceiling they have continuious flooring from one
> room to the next threw-out the wall also.
>
> The people before us put in a hot air vent to the upstairs bathroom by
> cutting a hole into the basement ceiling into the wall cavity and is
> letting the hair air travel all the way up the wall and into the
> bathroom without any true duct working.
>
> My problem is I drilled about a foot and a half from the basement duct
> and the snake is still on the portion of wall with the hot air since
> the snake finds its way all the way to the bathroom vent. Getting to
> the other side of the stud isn't possible since the toilet is right
> where I would need to start tearing everything up.
>
> My question is the air that would occupy that space even remotely be
> hot enough to cause issues if I take the wire up that portion of
> wall?
>

Which/what wire?

There are some code issues involved in running an electrical conductor wire
in this manner.

Might be okay for phone or network with a properly rated wire. Depends on
the temperature of the area involved.

Colbyt




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