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#4452558 - 07/07/17 05:55 PM Coiling up Coaxial Cable
Merkava_4 Offline

Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
I got an extra 6 feet of Comcast cable coming through the wall. How tight can I coil the cable up without damaging it? Right now it wants to be coiled up at a relaxed 16 inch diameter, but I'm wondering if I can coil it up tighter without breaking it. The cable is super stiff compared to Ethernet cable.

#4452560 - 07/07/17 06:01 PM Re: Coiling up Coaxial Cable [Re: Merkava_4]
Linctex Offline

Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Try feeding back into the wall first.
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#4452561 - 07/07/17 06:02 PM Re: Coiling up Coaxial Cable [Re: Merkava_4]
bioburner Offline

Registered: 09/19/16
Posts: 1418
Loc: Minnesota
I have several pieces around the house that are coiled to about 6 inches. The stuff is shielded and that bulks it up and makes it stiffer

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#4452565 - 07/07/17 06:05 PM Re: Coiling up Coaxial Cable [Re: Linctex]
Merkava_4 Offline

Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Linctex - that can't be done because the hole where the cable comes through the wall is filled in with silicone sealant.

Bioburner - 6 inches would be plenty tight enough. Even 10 inches would look better than it is now.

#4452573 - 07/07/17 06:09 PM Re: Coiling up Coaxial Cable [Re: Merkava_4]
eljefino Offline

Registered: 06/15/03
Posts: 32637
Loc: ME
Don't coil it too much tighter than the 16 in dia. You can get screwy results by snapping that center conductor. EG kinda sorta still working intermittently.

The fix is to cut the wire off where you want it and splice a new F connector on. You might even be able to flirt with comcast into doing it for you.

#4452580 - 07/07/17 06:16 PM Re: Coiling up Coaxial Cable [Re: eljefino]
Merkava_4 Offline

Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Eljefino - that would probably be the best way if I could make up my mind where I want the modem to sit.

#4452584 - 07/07/17 06:29 PM Re: Coiling up Coaxial Cable [Re: Merkava_4]
eljefino Offline

Registered: 06/15/03
Posts: 32637
Loc: ME
I put my modem in my basement and use Cat-5 to get it to my 2nd wifi hot spot as well as my blu-ray player so it doesn't overload the wifi. Clean. approved

#4452590 - 07/07/17 06:40 PM Re: Coiling up Coaxial Cable [Re: Merkava_4]
Superflop Offline

Registered: 07/01/09
Posts: 420
Loc: Seattle
Im going to guess it is rg6 coax which has a min bend radius somewhere around 10x the cable diameter.. or like 3 inches. If the jacket is wrinkling you are going to small

Edited by Superflop (07/07/17 06:40 PM)
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#4452652 - 07/07/17 07:23 PM Re: Coiling up Coaxial Cable [Re: Merkava_4]
Johnny2Bad Offline

Registered: 05/20/13
Posts: 1810
Loc: Saskatchewan, Canada
When you coil Coax, you break the integrity of the shield if it's copper alone (no additional mylar shield) and knowing how the average Cable Co operates, they are almost certainly using the cheapest bulk cable they can find, which means probably copper braid only.

Most Coax cable, if you can find the spec, will have a minimum bend radius limitation. Again, the chances of you finding the spec for what your Cable Co uses is slim to none, but 6" is a pretty common number.

Also note that when you coil any cable you create an inductive element, and inductance can lead to instability in some cases. Coiling a power cable can trip breakers, for example, where if you instead lay the cable out in a straight line to take up the slack it may run your power tool all day.

In the end, it's best to cut it to the desired length and add a connector.

You don't have to do that yourself ... it's the installer's fault and it's the installer's problem to fix. Create a ticket. If they give you grief about the reason, hang up, and make something up and call again. The installer will fix it in five minutes when he gets to you.

On the other hand, maybe you do want to do it yourself ...
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#4453632 - 07/08/17 05:40 PM Re: Coiling up Coaxial Cable [Re: Merkava_4]
sleddriver Offline

Registered: 02/06/10
Posts: 4603
Loc: Central Texas
I'm guessing what you have is RG-6 (maybe QS) with a solid center conductor. It is indeed much stiffer than Ethernet.

The more relaxed, the better. Coiling also induces inductance but with such a large dia., it won't matter much.
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#4453824 - 07/08/17 09:34 PM Re: Coiling up Coaxial Cable [Re: Merkava_4]
dishdude Online   content

Registered: 11/14/08
Posts: 8753
Loc: Phoenix
Drip loops are allowed to be 3" in diameter or larger, so it can be coiled pretty tight without damage.

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#4453907 - 07/08/17 11:16 PM Re: Coiling up Coaxial Cable [Re: Merkava_4]
CKN Offline

Registered: 10/14/14
Posts: 3700
Loc: Utah
They do that so if you re-arrange the room you have plenty of cord to do so. It's standard operating procedure.

#4453943 - 07/09/17 12:56 AM Re: Coiling up Coaxial Cable [Re: CKN]
Merkava_4 Offline

Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
I got it coiled up in an 8-inch loop now. I'm not going any smaller than that.

I also noticed they used 16 gage coaxial instead of the 18 gage homeowner grade.

#4454009 - 07/09/17 05:43 AM Re: Coiling up Coaxial Cable [Re: Merkava_4]
Lubener Offline

Registered: 01/22/11
Posts: 2576
Loc: N.Ohio
Your fine. Coaxial cable is more rugged than you think.

Edited by Lubener (07/09/17 05:44 AM)
The "thinking" man's friend.

#4454208 - 07/09/17 11:19 AM Re: Coiling up Coaxial Cable [Re: Merkava_4]
SHOZ Offline

Registered: 06/28/03
Posts: 5746
Loc: Illinois
Cut it to fit and add a new plug end.
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