I'm setting up a home ethernet network in a spare bedroom. I envision running up to two dozen ethernet cables out of a patch panel in this room to the rest of the house. I'll likely bundle these cables, punch through an interior wall and down into our crawl space.

How do folks recommend getting this many cables out of the room and down to the crawl space?

When I've previously run single ethernet cables between rooms, I've drilled small holes in bottom plates and sealed up these holes with caulk.

But, to make a hole large enough for 24 cables, I'm picturing having to make a much bigger hole. Sealing a hole this big with caulk seems like a mess, particularly if I have to run new cables in the future. But, if I don't seal the hole, I worry we'll get vermin coming up from the crawl space into the house (we've got a mouse problem).

I've also seen recommendations to place the cables in a pipe or conduit running down to the crawl space. But, it seems you'd have the same problem at the end -- how do you seal the end of the conduit where the cables come out?

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    In many jurisdictions, there is a code requirement that all holes through the floor plate be sealed with fire resistant foam. This is to prevent fire from moving from floor to floor, similar to requirements for fire block framing. – bib Jan 26 at 17:22
  • I imagine, on the end of a conduit through the floor, you could put a piece of rubber, like a balloon, that you can seal against the conduit, but will allow for stretch and expansion as needed. Or a plastic hole grommet that has a flexible out like a j-box clamp. – Jeff Cates Jan 26 at 20:29
  • Thanks both for these informative responses. I particularly like idea of flexible clamp at the end of the conduit! – Stinkpot Jan 28 at 3:46

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