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Topic:
Demarcation Box
This thread has 12 replies. Displaying all posts.
Post 1 made on Thursday July 12, 2018 at 22:50
alihashemi
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Hi All:

We have a house that was built on a new lot so we had to call the cable company to come out and install a tap and run cabling to the home. When they came to activate services, they didn’t install any enclosure at the demarc and they are not planning on coming back to do so. They only install a ground block and grounded it to earth rod for the main electrical panel and then connected a barrel for connection to the home.

I wanted to throw a box out there but I’ve never needed to do this before! Any recommendations? I’ve found a few on amazon like this:

CableGuard CG-1000XL Coax Demarcation Enclosure [Link: amazon.com]

I’m not even sure who the general manufacturers are for these. Not the biggest deal, was curious to see if you guys have had to install these when the cable company hasn’t!

TIA,
Ali
Ali Hashemi
Post 2 made on Friday July 13, 2018 at 00:30
tomciara
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Ali, I have used that box and would use it again.
"Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing ever happened." - Winston Churchill
Post 3 made on Friday July 13, 2018 at 02:09
Ernie Gilman
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What the cable guy did was kind of hilarious in contrast to the discussion elsewhere that starts with the idea that the cable guy will lock up the cable connections and continues on to the idea that there should be a separate cable company section and homeowner section if they want to lock up their stuff.

Tom, Ali, what are all the things inside the box for? Ground blocks and stuff?
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 4 made on Friday July 13, 2018 at 06:07
King of typos
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That box is actually the one on my landlord’s house.

Ernie, what you are question are just screw points. It’s supposed to make it easy to screw the ground block, splitters and such inside the box. With that said, I “love” to see those splitters where the coax is plugged on the top of the splitter. And the cable guy secures it to the box... then shuts the box on top of the cables. Depending on how messed up the rats nest is. There is a good chance of the bend radius being excessed.

OP. I personally would leave it as is for the cleaner look. Hopefully they put a good drip loop in the drop cable. And I would copy that drip loop on your side of the grounding block to make it uniform.

If you really want a box. This is the box that my old house has. Because all that is in there is the grounding block.
[Link: trianglecables.com]

KOT
OP | Post 5 made on Friday July 13, 2018 at 10:33
alihashemi
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Tom:
Sweet, thanks!

Ernie:
I read that post and thought the same exact thing, ha! Yes, all I need to throw in there is a ground block, actually.

KOT:
I thought about leaving it alone but it honestly looks terrible the way it is. There is limited space where it’s coming up and it may look cleaner with a box. But maybe you’re right, I’ll look at it again and maybe we just won’t touch it at all if we can make a few nice loops to make it look clean.

Thanks, guys!
Ali Hashemi
Post 6 made on Friday July 13, 2018 at 12:33
Brad Humphrey
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I actually like using the CG-1500 rather than the CG-1000XL. The 1500 has more surface area inside and easier to do proper cable management.
Post 7 made on Friday July 13, 2018 at 13:53
Ernie Gilman
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When I read this again this morning, I envisioned the cable guy mounting the grounding block where it could get rained on. Then it occurred to me they might even have mounted it so the wires enter the grounding block vertically. Who knows? Idiots have a much wider range of possible installation scenarios than the rest of us.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 8 made on Friday July 13, 2018 at 15:50
King of typos
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When I was a tech for Comcast. They taught us to mount exposed grounding blocks horizontally. And if we were within 5 miles of the ocean coast line. We were to install the rubber booted coax connections. [Link: goo.gl]

But it was a rare thing for me to see an exposed grounding block. When I did, i made sure it was mounted horizontally.

KOT
OP | Post 9 made on Friday July 13, 2018 at 19:37
alihashemi
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Ernie and KOT:

The grounding block is literally just hanging in mid-air. No rubber booted connections, either, and we are only a few miles from the beach!

I was really surprised when I saw this.

Brad:

Sweet, I hadn't seen this one. Looks much better. Do these have an opening for 1/2" or 1" conduit? I couldn't see anything. Is cable usually brought in without conduit?
Ali Hashemi
Post 10 made on Saturday July 14, 2018 at 10:28
Ernie Gilman
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I've seen cable brought down from a pole, so no conduit, or run underground in a flexible black PVC tube that pops up out of the ground within a foot of the building. The tube end points upward. Thus it can collect rainwater or sprinkler output. I'm sure every one of these has water in it after a year or so.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 11 made on Saturday July 14, 2018 at 14:28
Brad Humphrey
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On July 13, 2018 at 19:37, alihashemi said...
Do these have an opening for 1/2" or 1" conduit? I couldn't see anything. Is cable usually brought in without conduit?

No conduit specific openings. Just a row of opening at the bottom with seal foam. And a knockout on the back to bring cables directly into the box from the house if needed.

The door on that one just snaps off, so you can lay it on the ground and put stuff in it while you work. Then when you are done, snap it back on and swing it closed.

And it has V ridges on the back to mount it to a pole if needed. Although I have never used one like that yet.
Post 12 made on Saturday July 14, 2018 at 14:31
roddymcg
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In the future if you can get in the builder's ear ask them to build housing for the low voltage demarc, and even the electrical meter if they fancy. This looks so much nicer in the end.
Not life, but good life, is to be chiefly valued.
Post 13 made on Saturday July 14, 2018 at 17:16
Ernie Gilman
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If you're talking to the builder, there's a two-piece thingy that can be built into the wall. Mostly we see these flushed into the stucco on buildings here in S Cal. The one for cable is about 4" high. The one for phone is about 8" high.

A rectangular frame screws onto a couple of studs, horizontally. After stucco and paint, the lid is put on and held in place with two screws. They're all of maybe five or ten bucks. Thing is, I can't figure out what they're called and Home Depot has no idea what they are.

Anyway, they use the space between studs as a place for terminations to go. There's not really a lot of room, but hey, they're cheap and they're out of the rain.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw


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