Security camera cabling.

[slee95]

If this thread is in the wrong place I apologize. I need to pick someones brain. Trying to run security cameras. I want the easiest and most efficient way to run the cameras. I can run 4 separate lines into the house (8 actually, 4 video 4 power). Is there a way to combine the cables into one line? I could Jimmy the power cables into one line I suppose. I apologize for my grammar.

[stj]

Re: Security camera cabling.

not really.
why not use networked camera's?
you can run power over ethernet wiring and you can even use PTZ camera's

[slee95]

Re: Security camera cabling.

The cameras have bnc video and a barrel jack power.

[stj]

Re: Security camera cabling.

i know, but multiplexing them into a single cable wont be easy and it would trash the image quality.
you will also have to use very expensive double-screened cable or keep it pretty short.

[slee95]

Re: Security camera cabling.

Oh ok Last idea for video then I will shut up. Coaxial splitter to one line. Can I at least reduce power cable by daisy chaining them to one cable? Here is the camera type I am using http://www.ebay.com/itm/Outdoor-600T...UAAOxyTMdTOiJb .

[delaware74b]

Re: Security camera cabling.

Look for siamese camera cable. It has both RG59 coax and 18-2 power cables bonded in a zip-cord. You can rip the 2 sections apart like a 2-conduction extension/lamp cord in order to make your power and video connections. Most commercial camera systems use this unless they're using video over cat5/6. Signal limitations is about 300 feet per camera before switching to cat5/6.

[stj]

Re: Security camera cabling.

power cable can be daisy-chained as long as the volt-drop doesnt get too bad.
or use a seperate psu for each camera getting power locally.

[slee95]

Re: Security camera cabling.

Thank you so much I was thinking about doing that delaware74b. Splitting the video and power cables. Cables are salty I bought a one 100 ft on eBay it cost me $7.99 (times that by four ouch.

[japlytic]

Re: Security camera cabling.

For RF (audio+video modulated into RF), you need 50 ohm cable (as typically used by radio transmitters); for video, you need 75 ohm cable.
An impedance mismatch can have significant effect on performance, particularly over long distances.

[TVRepairNoobie]

Re: Security camera cabling.

Use Cat5e for your video security cameras,"Future proof" when you want to go with IP video system later.
Togather with video balun.

video + power
1 Channel Passive CCTV BALUN - Video/Power over Cat5
or
If you need audio, video, and power use below.
1 Channel Passive CCTV BALUN - Video/Audio/Power over Cat5

[SteveNielsen]

Re: Security camera cabling.

You can supply power as a DC offset on the coax as long as you decouple it at both ends. It's done for powered TV antennas. Different frequencies involved but it's still AC and DC on the same wire.

[slee95]

Re: Security camera cabling.

TVRepairNoobie I was thinking about that do to video and power are on one line. It would be expensive to do more then one camera though.

[slee95]

Re: Security camera cabling.

SteveNielsen I never heard of doing that could you provide a link on that?

[TVRepairNoobie]

Re: Security camera cabling.

Slee95,

Yes, it can get expensive. But, find and buy the cheapest video balun.

I prefer the ones below.
$3.18 Shipped - http://www.ebay.com/itm/BNC-Coax-CCT...8AAOSwo6lWJzwp


These below sucks due to cable break or moving the DVR around too much, you will get signal lost and hard to remove the BNC if you need to.
http://www.ebay.com/itm/1-PAIR-2Pcs-...EAAOSwpdpVZj-M

[SteveNielsen]

Re: Security camera cabling.

I don't have any links. Capacitors are put in series with the signal connections with resistors or coils from signal to gnd to match impedance at the input and output of the caps (where the caps connect to the equipment, not the coax), the DC is connected and carried along the signal wire between the caps but the caps block the DC from the equipment. I don't know what the cap value should be but the impedance would be 75 ohms. For VHF it would be around 1 to 10pF but that's at 50 ohm impedance, for comp video I don't know.

[slee95]

Re: Security camera cabling.

TVRepairNoobie They are a lot cheaper then the ones I was looking at thank you.

[slee95]

Re: Security camera cabling.

SteveNielsen Thankyou.

[budm]

Re: Security camera cabling.

Power over coax:
http://www.eetimes.com/document.asp?doc_id=1279219
https://cdn.badcaps-static.com/pdfs/...aa7ee5dc2c.pdf

https://cdn.badcaps-static.com/pdfs/...a1743e860e.pdf

http://www.foresight-cctv.com/VDS2500.htm

[Uranium-235]

Re: Security camera cabling.

we had 4 rf cameras. (lorex). One by one, they stopped working, the RF would degrade and eventually they would stop altogether.

i'm all for running POE cameras with Cat6. One sturdy cable to handle everything.

[Uniballer]

Re: Security camera cabling.

i'm all for running POE cameras with Cat6. One sturdy cable to handle everything.

I do not recommend Cat6 cable unless you *need* the higher POE capacity from the slightly larger wire gauge. Cat5e will handle gigabit speeds and 15.4W POE just fine at the full 100 meters. Cat6 will not support 10Gbe beyond 55 meters (and maybe not that far, depending on installation factors). Use Cat6a if you need future upgrade capability, or install conduits in select locations so you can easily pull in a few newer cables later.