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  1. #1

    Default Running Ethernet Cable through Walls?

    Long story short, I want to run an ethernet cable from the living room upstairs where my cable modem and router are, to the finished basement directly below where my gaming PC is set up. Does anyone about have knowledge of these things? How much of a headache am I looking at, and should I just say screw it and pay someone to run the cable?
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  2. #2
    Machine Gunner DenverGP's Avatar
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    I had a similar job to do at my old house.

    Found a wall in living room that was directly above a drywall wall in the basement.

    I had to cut the drywall in the living room, about a 1 foot by 1 foot square, about 6 inches up from the floor. Thru that opening, I was able to use a long spade drill bit to drill down thru the floor (including thru the living room wall footer, and basement wall header.

    Then in the basement, I cut a small outlet sized opening. Ran the ethernet cable down thru the hole and fished it thru the outlet opening, then wired it up to an ethernet wall plate.

    No drywall repair needed in the basement, but the one in the living room will need to be fixed. In my case, I lucked out and there was a closet on the opposite side of the living room wall, and I was able to cut into the wall inside the closet, so the repair didn't need to be completely finished. I just put the cut piece back in, did some sanding, and mud/taped it and I was done.
    Last edited by DenverGP; 06-12-2022 at 11:14.
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    Smells Like Carp
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    I used a GI cleaning rod and patch tip to pass a wire between floors.
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    Serial Speed Limit Breaker
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    Instead of running through the wall, you could consider running it through the floor.

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    Machine Gunner
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    You can run it through air ducts if you get the less toxic version of cable.

    If you want to run through walls it?s a bit more complicated. I got a flexible drill and tape. Basically you find empty walls drill holes and then go fishing for the cable. Worst case punch some holes for drill access and then patch them after you run cables. Watch out for pipes and AC etc.

  6. #6
    Gong Shooter
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    Default Running Ethernet Cable through Walls?

    Do you have an interior wall in the same place above and below?

    Interior is important because no insulation. Cut a small rectangle upstairs about the size and location of a 1-gang old work box. Use a 1/2? auger drill and extension to drill through the hole at a slight angle through the bottom plate of the wall.
    Directly below that spot downstairs, cut another hole for a 1-gang old work box. Fish a weighted string down the wall and catch it in the basement cutout. Use that to fish your wire.

    If you can do that, worst case you put a wall outlet on each hole and run patch cables to and from.

    ETA: to run through duct work, get ?Plenum? rated cable.
    Last edited by Frac; 06-12-2022 at 21:42.

  7. #7

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    Quote Originally Posted by Frac View Post
    Do you have an interior wall in the same place above and below?

    Interior is important because no insulation. Cut a small rectangle upstairs about the size and location of a 1-gang old work box. Use a 1/2? auger drill and extension to drill through the hole at a slight angle through the bottom plate of the wall.
    Directly below that spot downstairs, cut another hole for a 1-gang old work box. Fish a weighted string down the wall and catch it in the basement cutout. Use that to fish your wire.

    If you can do that, worst case you put a wall outlet on each hole and run patch cables to and from.

    ETA: to run through duct work, get ?Plenum? rated cable.

    Yes, it's an interior wall for both locations. The area I want to run to is directly below the area I want to run from.
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  8. #8
    Witness Protection Reject rondog's Avatar
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    Worst part is going to be crimping the plugs on the ends of the cable. 8 little color-coded wires. If you don't have a schematic, and you've never done them before, they be challenging. Also nice to have a cable tester to verify it's right. I've done a few in my day, ain't as easy as you'd think.
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  9. #9
    Self Conscious About His "LOAD" 00tec's Avatar
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    Quote Originally Posted by rondog View Post
    Worst part is going to be crimping the plugs on the ends of the cable. 8 little color-coded wires. If you don't have a schematic, and you've never done them before, they be challenging. Also nice to have a cable tester to verify it's right. I've done a few in my day, ain't as easy as you'd think.
    WO/O/WG/Bl/WBl/G/WBr/Br

    They make easier connectors to fiddle with, but still easy to get wrong

  10. #10
    You Want Him In Your Corner
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    Running in-wall in a finished house can be a pain. Never know what's inside the wall. You can run through the floors and "along" the walls easier, but it's ugly. Either way, don't crimp the ends, use "punch-down blocks" and/or wall "biscuits" so you have female RJ45 on both ends. Also leave a "service loop". And if we are gonna run 1 cable, we run 2 just in case. Cat 6 minimum these days.

    Might be easier to move the cable modem / wireless access points to the middle floor for better coverage..
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