Power Supply Wiring

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aidanmcg33

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Apr 6, 2020
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Hi I've 6 cameras around the house which are all wired using cat5e cable. I've brought all the wires back to a central point in the house and now need to connect them to the 9 way distribution box and the DVR. Connections to the DVR are handled via passive video balun.

I am worried about the mess of wires that might be left behind if I need to strip the CAT5 back and take some of the wires into the PSU and connect the others into the baluns. Has anyone any photos of how this has been done well in the past or tips on how not to end up with a big mess of cable.

Thanks
 
i understand you have one cable per camera and by 9-way distribution box, you mean a 9 channels power supply (mostly 12Vdc) at the DVR side. For the balun, select an keep a twisted pair (same color) at both ends. For the power supply (assuming 12Vcd, then +ve, -ve), use the remaining pairs. Read the instructions from the following side:

Using CAT5 cable to connect CCTV cameras to a DVR. A guide from CCTV42

In recent years the invention of the video balun has meant CAT5e cable can be used to connect CCTV cameras to CCTV DVR recorders. All the connections can be made using only a screwdriver, no need for special tools or fiddly components
www.cctv42.co.uk
 
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Where to run the wires etc isn't an issue. It's how to do it in a way that is neat. I was hoping people might have photos of previous wiring attempts that would illustrate how to leave an organised and neat finish
 
Apologies but I'm perhaps not being clear on what I'm needing help with. None of the pictures show how the PSU is wired and how the CAT5 cables are wired into the PSU and into the DVR which is what I'm after
 
OK so hopefully to help explain what I'm after, I am trying to avoid ending up with a finished product that looks like this:
mess.jpg

My PSU is Haydon HAY-PS912
20200405_171748.jpg 20200405_171742.jpg

Here is the wiring layout that I'm following
Layout.png

The best image I have found that gives me an indication of how to wire this neatly is this one but the wiring here is not CAT5
Screenshot_20200405.jpg

Hopefully this helps and thanks for the assistance so far.
 
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OK, so you'd need to split the cables back for a bit longer than is in the linked images such that there is enough length to reach into the PSU box and its screw connectors.
The wires to the PSU can safely be bundled together from where they exit the Cat5E cable for neatness, and the free length at the baluns minimised again for neatness close to the DVR.
The PSU wires can be enclosed in a spiral sheath as a way to bundle them.
 
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The way I normally setup the cable management at the DVR/PS end point, enter the cat5 (Point-A) into PS metal box. Using a wire stripper to slightly cut the cover and expose all four cable pairs (Point-C). Cut all cables (Point-C, no need to remove the cable cover), except the blue pair. Do another slightly cover cut, approximately 12 inches behind (do not cut the cables, only the cover). Pull and extract all three pairs except the blue. Use those exposed pairs for connecting power to the cameras, as explained in the site link. Exit the power supply metal box to connect the blue pair to the balun (Point-D)

cat5 cable run.png
 
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eggsan said:
The way I normally setup the cable management at the DVR/PS end point, enter the cat5 (Point-A) into PS metal box. Using a wire stripper to slightly cut the cover and expose all four cable pairs (Point-C). Cut all cables (Point-C, no need to remove the cable cover), except the blue pair. Do another slightly cover cut, approximately 12 inches behind (do not cut the cables, only the cover). Pull and extract all three pairs except the blue. Use those exposed pairs for connecting power to the cameras, as explained in the site link. Exit the power supply metal box to connect the blue pair to the balun (Point-D)

View attachment 58894
Click to expand...
Perfect, thank you
 
Hi everyone.

i know this post is old, but its exactly what am looking for (took me ages to find this). i have just had 8 rewires of cat 5e cable as a couple of old cables went down.

am wanting to get a 12v power supply box as i have way to many cables & wanted to confirm if i can use the following , a

12v 10A CCTV Power Supply Box Battery Backup UPS 9 Channel With AC Plug for Surveillance Camera Access Control LED​

with a Hikvision DVR with 2x8mp cameras and 6 x 5mp cameras. i will be using balun's to the DVR, just wanted to know if i can use the power supply box to power up cameras using cat 5 cable.

also am getting interference and hoping this power box will help, as i was told that the cables are too far away, hence interference. waiting for the cctv to come out

thanks
 
In theory it can work. Please don't use the PDU to power your DVR if you can get away with it. Also and most important thing is did you confirm before you rewired your cameras that your Cat5E is real copper? If it is CCA of any type there can be an issue even on analog systems. CCA isn't good for anything other then to watch it melt in to a fire pit..

Next have to worry about the distance and type of cameras you are using. If you are using all low current cameras and distance is short enough you could get away with powering the camera with only 1 pair of wires. Normally I use 2 pairs and in the wires I find the one pair that has the best twist and use that for the video.. If your camera is a high current camera then I use all 4 pairs of a Cat5E to power the camera and bring in a second cat cable for video.

Have you ran your 8mp on Balun before? Not all Baluns are equal and some are even picky on what one they will work on. TVI need to make sure your balun supports 8mp.. I don't use them myself. I just BNC taps that just have a BNC on 1 end and 2 screw area on the other looks like the power ends, just made for analog cameras..

About the noise you are getting that is called Ground Loops. You will want to get some video ground loop ferrite core that is rated upto 10Mhz for analog CCTV.. In some cases you will be able to get away with just 1 as close to the DVR as you can and in other cases you will want to setup at both ends. Again as close to the DVR and Camera as you can. Loop the video cable around the core a couple of times and snap it shut. Or if you can not find a good enough ferrite core for your needs they do sale Video Ground Loop Isolators Also make sure the camera and DVR are grounded correctly to avoid multiple ground points. To aid DON'T RUN Cat5E next to any high voltage power lines. Don't lay them over your house wiring or run in your high power conduit.

What is the distances you are trying to run your cameras to your DVR?
 
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Revo2Maxx said:
In theory it can work. Please don't use the PDU to power your DVR if you can get away with it. Also and most important thing is did you confirm before you rewired your cameras that your Cat5E is real copper? If it is CCA of any type there can be an issue even on analog systems. CCA isn't good for anything other then to watch it melt in to a fire pit..

Next have to worry about the distance and type of cameras you are using. If you are using all low current cameras and distance is short enough you could get away with powering the camera with only 1 pair of wires. Normally I use 2 pairs and in the wires I find the one pair that has the best twist and use that for the video.. If your camera is a high current camera then I use all 4 pairs of a Cat5E to power the camera and bring in a second cat cable for video.

Have you ran your 8mp on Balun before? Not all Baluns are equal and some are even picky on what one they will work on. TVI need to make sure your balun supports 8mp.. I don't use them myself. I just BNC taps that just have a BNC on 1 end and 2 screw area on the other looks like the power ends, just made for analog cameras..

About the noise you are getting that is called Ground Loops. You will want to get some video ground loop ferrite core that is rated upto 10Mhz for analog CCTV.. In some cases you will be able to get away with just 1 as close to the DVR as you can and in other cases you will want to setup at both ends. Again as close to the DVR and Camera as you can. Loop the video cable around the core a couple of times and snap it shut. Or if you can not find a good enough ferrite core for your needs they do sale Video Ground Loop Isolators Also make sure the camera and DVR are grounded correctly to avoid multiple ground points. To aid DON'T RUN Cat5E next to any high voltage power lines. Don't lay them over your house wiring or run in your high power conduit.

What is the distances you are trying to run your cameras to your DVR?
Click to expand...
thanks for the reply. a professional installer has fitted the cat5e cable and the baluns on all cameras and DVR. i did have coax before but two failed over time and the installer fitted the cat5 cable

in regards to noise i have purchased a ground loop isolator however it didnt work. it was the one i bought to test.

the distance is probably no more than 200 metres

my main issue is using the power supply box to power up the cameras through cat5 to git rid of all the small power supply to tidy everything up. the installer is coming back soon and hes getting a gob full from me., as its took ages for him to come back out
 
Yeah at 600 feet I personally wouldn't try to power a camera over cat5E and would have power supply added mid span or end span. Back in the day when I had all analog cameras out at my farm I had some cameras that were rather far. So I ran the camera video line and data line for PTZ over the normal Siamese cable and ran cat5E from a location that was closer to the cameras. In some locations I used just Siamese cables but for those cameras they were 24v and again still mid way added power supply to make sure that the distance to camera for voltage drop was not to great. Meaning if you are trying to run power the full length of the cable run you will burn out your cable and might even damage your camera.

So I don't know your cameras. But when you are using a PDU the good ones have voltage control. Keep in mind that you will want to make sure that you are not sending to much voltage to your camera. Normally PDUs are setup not to send more voltage then your camera can work with.. But keep in mind that as your camera distance is longer it will require more voltage to keep the camera at a level it can work. At 600 feet my guess your real issue is that you are at the lower end of what the camera can work at and the camera is seeing voltage spikes as it is trying to pump out more voltage to keep your camera working. Most cameras will work down to like 9v that is because they know there might be voltage drop over distance. Same for a high voltage normally about 13v to almost 14 but to be honest that is where things get kind of bad for the cameras that are closer. Running camera at the max rated voltage isn't a good idea. However if you are using one of the higher end PDUs then don't worry about it the installer should just set each output to the right voltage for the camera it is feeding..

However again for longer runs if you have power even at the middle area of the run or closer to the camera installing a power supply closer to the camera will help keep things working in good order.. 600 feet or 200 meters as you said is way to much for 12v to travel down cat cables?
 
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Revo2Maxx said:
Yeah at 600 feet I personally wouldn't try to power a camera over cat5E and would have power supply added mid span or end span. Back in the day when I had all analog cameras out at my farm I had some cameras that were rather far. So I ran the camera video line and data line for PTZ over the normal Siamese cable and ran cat5E from a location that was closer to the cameras. In some locations I used just Siamese cables but for those cameras they were 24v and again still mid way added power supply to make sure that the distance to camera for voltage drop was not to great. Meaning if you are trying to run power the full length of the cable run you will burn out your cable and might even damage your camera.

So I don't know your cameras. But when you are using a PDU the good ones have voltage control. Keep in mind that you will want to make sure that you are not sending to much voltage to your camera. Normally PDUs are setup not to send more voltage then your camera can work with.. But keep in mind that as your camera distance is longer it will require more voltage to keep the camera at a level it can work. At 600 feet my guess your real issue is that you are at the lower end of what the camera can work at and the camera is seeing voltage spikes as it is trying to pump out more voltage to keep your camera working. Most cameras will work down to like 9v that is because they know there might be voltage drop over distance. Same for a high voltage normally about 13v to almost 14 but to be honest that is where things get kind of bad for the cameras that are closer. Running camera at the max rated voltage isn't a good idea. However if you are using one of the higher end PDUs then don't worry about it the installer should just set each output to the right voltage for the camera it is feeding..

However again for longer runs if you have power even at the middle area of the run or closer to the camera installing a power supply closer to the camera will help keep things working in good order.. 600 feet or 200 meters as you said is way to much for 12v to travel down cat cables?
Click to expand...
this makes sense, as the installer is coming back to see where he can move power supply closer to cameras.
 
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