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ENT used as a low voltage cable sleeve?

mtlogcabin

mtlogcabin

SAWHORSE
Joined
Oct 17, 2009
Messages
10,085
Location
Big Sky Country
Does anyone know of a listed assembly when electrical non-metallic tubing (smurf tubing) is used as a through penetration sleeve for low voltage wires in a one hour wood framed wall assembly?
The sleeve sizes are 1, 2, and 3 inches.
 
This is just a sleeve through the wall? I don't think so.

I have had a steel sleeve along with little intumescent "sandbags" accepted and there are some rated pads through. I can't imagine ent ever being rated.
 
Like bill1952, I have seen steel ridged conduit that had a Hilti ring at the wall and intumescent caulk filling the ends. The three inch that you mentioned for low voltage cable indicates a bunch of cable. I would question if Hilti caulk could work with a fist size bundle or would it be better to split it up. As it stands with me, I always ask the architect what to use. No architect, then ask the engineer. No engineer, then ask Hilti. Nobody to ask, then the sleeve is steel and reaches 6” past each side of the wall. No sleeve will be larger than 1.5” the caulk will be applied like a gas tight fitting filled with chico. Hilti ring at each penetration.
 
Most "sleeves" I have seen usually extend 1 to 3 inches from the gypsum wall board. These are 4 to 6 inches out from the wall and I don't see how the fire caulking is at the wall line where I think it should be. I also think mineral should be pack in before the caulk is installed. This is what the architect provided
1742429361323.png
 
mtlogcabin said:
Most "sleeves" I have seen usually extend 1 to 3 inches from the gypsum wall board. These are 4 to 6 inches out from the wall and I don't see how the fire caulking is at the wall line where I think it should be. I also think mineral should be pack in before the caulk is installed. This is what the architect provided
View attachment 15313
Click to expand...
I like mine better than the architect’s idea.

“sleeve is steel and reaches 6” past each side of the wall. No sleeve will be larger than 1.5” the caulk will be applied like a gas tight fitting filled with chico. Hilti ring at each penetration.”
 
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