Question about buried feeder and rg59
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MikeInEburg
Veteran Member
No! Separate them by at least a foot
MikeInEburg
Veteran Member
I would either dig a slightly wider trench and put side-by-side a foot apart. or put power in bottom, fill a foot, then low voltage.
^^^ Either of these will work.
ps
While you have the trench open, I would put NM PVC conduit in and pull the low voltage cables (e.g. RG6 & CAT5/6) through the conduit. This protects the low voltage cable from moles and such, and moreover if you want to pull something else later you have the ability to do so.
Wrooster
Just to add to the complexity....
RG59 is very lossy.
If it's more than a a few feet, I would suggest you use a far less lossy cable like LMR-240 or 400 (get the 75 ohm versions if this is for cable/satellite).
Just to confirm, will you be transmitting through this cable?
As for data, shielded Cat6 is the way to go (in PVC conduit).
Of course, you could run fiber, either instead or in addition.
RG59 is very lossy.
If it's more than a a few feet, I would suggest you use a far less lossy cable like LMR-240 or 400 (get the 75 ohm versions if this is for cable/satellite).
Just to confirm, will you be transmitting through this cable?
As for data, shielded Cat6 is the way to go (in PVC conduit).
Of course, you could run fiber, either instead or in addition.
Siamese RG59 is standard for the analog security camera world, and signal degradation due to attenuation over distance is generally not a concern until out past 100 feet [30m] or so. The bigger problem is noise and crosstalk. The shielding effectiveness of inexpensive siamese RG59 can be pretty poor -- and since camera power is carried in the same jacket it too can suffer from induced noise from nearby electrical cabling. For this reason, I suggested above carrying the video on RG6, specifically "QS" (quad shielded) type. Noise immunity is much higher with QS RG6, and furthermore if noise is getting into the DC camera supply you can simply use a "spare" QS RG6 or CAT6 to carry the power. Note that QS RG6 requires specific compression connectors for termination. You can purchase the QS cable and QS-compatible connectors from Monoprice, among other online vendors.
Video Cables- <b>RG-6 (F) type</b>
and
For only $14.95 each when QTY 50+ purchased - [50pcs] Male F connector w/Plastic Seal and Smooth Aluminum Body for RG-6U Quad Shield | Compression F Connectors w/Aluminumn Body
One other note -- Times LMR400 will be nearly impossible to pull through conduit fitted with any amount of bends, and moreover the aluminum center conductor (copper bonded) is really not amenable to repeated flex during the pull process.
Wrooster
You clearly know your stuff.
I didn't realize it was for CCTV. I thought maybe it was for cable/satellite signals, where loss can be an issue.
Yea, LMR400 is big. Even the non-flex version, however, is pretty flexible though -- wouldn't want too tight an angle though.
Yes, noise and crosstalk are the bigger problem, which quad shield RG6 minimizes much better than 59.
Thanks for setting us all straight.
MikeInEburg
Veteran Member
One more comment - be sure that whatever cable you install has appropriate jacket. Even if installed in conduit, cable should be duct rated. Every underground conduit eventually fills with water, so cable must survive extended immersion.
Mike
Mike
three years ago i ran a trench to my shop for power and for once i had the foresight to go a little further - along with the 2" conduit for the power i ran a 1" conduit with two cat-5 lines (landline, data) and an rg-6 (cable tv). since my backhoe has a 16" bucket i just separated the conduits to the width of the trench and it has worked fine for tv reception.
my run is close to 200' and the cable tv worked fine. i haven't tested it recently though - we just got "upgraded" to all digital in our area and i haven't bothered to get an extra converter for the shop to see whether it will work. i also never got around to hooking up the landline or the data line. cell and wireless won that battle.
my run is close to 200' and the cable tv worked fine. i haven't tested it recently though - we just got "upgraded" to all digital in our area and i haven't bothered to get an extra converter for the shop to see whether it will work. i also never got around to hooking up the landline or the data line. cell and wireless won that battle.
