I am replacing some old cameras that came with the home to more modern ones.

I took apart 1 of the cameras to find this: enter image description here

Now I am guessing the yellow is video, and black and red are power (hot and neutral?)

I am not sure what the wire beside the yellow one is doing. I should add these were most likely installed by Brinks a long long time ago.

Here is another camera I want to replace:

enter image description here enter image description here

Here the wire coming in has 5 wires? 1 video and 4 power? Hmm not sure what to make of that.

The cameras I bought are Lorex ones that use power and bnc cables:

enter image description here

I am guessing I have to cut that cable open and splice it in? Does anyone know if the supplied cable has three wires? two in the power part, and 1 in the BNC part?

The other end of the cable is a disaster. It must split somewhere and the video part goes into this:enter image description here

enter image description here

The power might go somewhere here:

enter image description here

But I'm not sure...

I also wanted to install a video doorbell where there used to be a working camera:

enter image description here enter image description here backside: enter image description here

This camera has 3 lines into it: black red white. I am assuming two power and 1 video? Most likely DC power? From my understanding the nest and ring ones use AC power -- so this will probably not work?

Sorry for the long post, need some help! Thank you

  • 1
    Need a lot more info here. But first you need to clarify your question. If it's how to hook up your Lorex cameras you need to provide info on the cameras. The directions should tell you how to proceed. Did you follow them? What problems did you encounter? If you don't have the installation instructions look on-line for them. We'll try to help you to help yourself. Provide some additional info and edit your question to be clear on the current situation and what you're asking.
    – HoneyDo
    Commented Feb 21, 2020 at 3:24
  • The camera system I got is the LX1080-44BW Lorex system. The current situation is how to hook up the cameras (I don't have them yet, they are shipping). I am doing preliminary research.
    – sci-guy
    Commented Feb 21, 2020 at 3:34
  • 1
    Have you thought about just upgrading the whole system, wires and all? The cameras are usually the most expensive part .
    – JACK
    Commented Feb 21, 2020 at 13:54
  • Some cameras have another wire for the microphone. Even if they don't have a microphone, the control board might have a pinout for one, and the wire that was run might have an extra wire to support it.
    – JPhi1618
    Commented Feb 21, 2020 at 15:34
  • @JACK I really don't want to run new wire. If I can reuse the existing wire, then I think that is the way to go?
    – sci-guy
    Commented Feb 22, 2020 at 3:28

1 Answer 1


"yellow" is probably the center conductor of the coaxial cable for video, the black one beside it is likely the shield/outer conductor and grounded. Hard to see for sure with a mess of black goop on there.

A BNC coax has two conductors - a center conductor and a circular shield conductor around the outside.

Red is likely + DC (12 or 24 volts most likely) black will be - DC and probably also ground in most (not all) systems.

If the current system is not running coax (which it obviously has in the "video part" picture) all the way to the cameras you might need to run new coax. If it does, but without connectors, you might need to crimp new connectors onto the coax.

  • I agree that most of these cameras are low voltage looks like 12v because of the wall wart I see 12v. I would ask what kind of cameras all the newer ones I use do not use coax they cat 5+ or 6. To the dvr.
    – Ed Beal
    Commented Feb 21, 2020 at 20:22
  • Post states that the new ones use power & BNC - not how I'd do it in the age of POE network cameras, but they are still made that way too.
    – Ecnerwal
    Commented Feb 21, 2020 at 21:55
  • I have adapters that break out video and power for some of my older cameras that I use POE. Much easier to work with than coax + power or power on the same coax as the video.
    – Ed Beal
    Commented Feb 21, 2020 at 22:01
  • Well I picked the BNC / POWER combo instead of POE because the cables that are already in the home seem to be that. If I were to do it from scratch I would use POE.
    – sci-guy
    Commented Feb 22, 2020 at 3:29
  • 1
    Maybe I should get a cable tracer to see where that power breakout is. If it goes to that panel then I can just splice in the cable Lorex provides on both ends. Should work?
    – sci-guy
    Commented Feb 22, 2020 at 3:31

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