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Access network design for branch, remote, outdoor and campus locations with Aruba access points, and mobility controllers.
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Sealing ends of conduit outdoors -- any favorite tricks?

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  • 1.  Sealing ends of conduit outdoors -- any favorite tricks?

    Posted Sep 23, 2022 06:08 PM
    I'm doing my first outdoor wireless install, which will be mounted over top of a building parapet. The top is about 3 feet deep flat stone, and the main lightning arrestor ground cable for the building is siliconed (glued, essentially) down the middle of it.

    We've rigged up an L-shape of 1-1/2" conduit as a frame/mount. The AP mount (an H1) is strapped to one end with hose clamps, and then the pipe lays across the parapet, underneath the ground cable, and then there is an elbow and conduit heads straight down towards the roof. Since the conduit is steel, and will be in good contact with the ground wire, grounding the AP will be simple.

    We are planning to run the outdoor grade ethernet wire out of the bottom of the AP and feed it through the conduit over the parapet, and then the cable will come out the other end and go across the roof into a simple junction box where we've pulled and terminated the main ethernet run back to the building.

    Here I've got it on a cart, which is roughly the depth of the parapet:

    (The yellow ethernet cable in the picture is a stand-in for the cable we will use.)

    The detail that I haven't figured out is how to seal the two ends of the conduit around the emerging cable:

    The seal isn't really meant to protect the cable so much as to keep the wasps and other critters from setting up residence inside the pipe!

    If it were a smaller opening I'd just stuff silicone in there around the wire, but I'm not sure that works given the size of the pipe.

    Those of you who've solved this sort of problem before -- what would you do?


  • 2.  RE: Sealing ends of conduit outdoors -- any favorite tricks?

    Posted Sep 23, 2022 06:23 PM

    Cathy,

    Looks like your pipe is metal, but the purple color on the open end looks like plastic pipe primer. With either material and your only concern being keeping critters out, I would recommend using these plastic pipe caps and just drill a hole big enough to pass the diameter of your un-terminated cable through:

     

    You should be able to get them easily at any big box home improvement store. If the pipe is metal, just use super glue, epoxy glue, or maybe hot glue. If the pipe is plastic, just use PVC pipe cement. I hope this helps.

    Thanks,

    Brad