CCTV camera cable config.

[steviebobs]

HI all, and apologies for pestering this forum yet again.

A quickie, after having my analog cameras outside for quite some years I found that I had weathered plug/socket problems so decided to cut off old plugs and fit new ones. On some old cctv cable I had it simply had a red/black for power and an inner/braid for signal. Having now chopped off the plugs I find my camera cable has:

One cable with two blacks and two reds (power?)
One cable with two blacks and a yellow (signal?)

How does that match up to the simple '4 wire' cctv cable mentioned previously?

As always, thanks for reading.

 

[SandyLyon]

Have you not still got the plugs so you can test the pin configuration.

If not upgrade the cameras

 

[sparkymarka]

Cable with red and black …..power 12+ red 0v black
cable with yellow and black ….. yellow video signal ( centre pin of BNC ) black ground outer of BNC …..( common ground with 0v )

 

[steviebobs]

Sandy, they have actually been cut off a while with the “I’ll get round to this later” view. Don’t have them now.
Sparky, the cable shown is the one attached to the camera with the duplicated colours I want to understand. The spare bit of cable I have complies with your comment as I have mentioned.

 

[ahow35]

Chances are the red and black is power but if you don't have one, invest in a little tester.

 

[steviebobs]

Thanks, I do have a tester (my background is in electronics) but the cable(s) I want to 'test' is the one that goes to the camera and I want to establish why the 'power' lead has 2 reds and 2 blacks, and the 'signal' cable has 2 blacks and a yellow (not co-axial, but separate wires). The supply lead (from the DVR) has the colours as suggested by Sparky (red/black power and thin coaxial signal). Originally, the camera had a power plug and a co-ax signal plug connected which I cleverly cut off and binned assuming the resultant cable would be self explanatory ie red/black power and a coax, but, as per the piccy, it seems to have 4 power wires and 3 signal.

 

[steviebobs]

Solved. After a bit of playing round I did the obvious. On the power (2 blacks and 2 reds) I bunched them. On the signal, I bunched the blacks, connected blacks to braid and the yellow to the signal (inner). All works. I did try this at first but got no signal so not sure what is different this time.

Thanks (as always) to you all for your interest and assistance.

S