naz

definitely going to change the cable, the wire polarity is correct I am still baffled as to why this has happened i wish it was a cross cabling at least that way i would know for sure that was the cause. The only other thing that i did different on this installation was i directly connected the cat5 cables i allocated for power straight onto the psu, again i made sure the polarity was correct. I didn't use any DC pigtail cables.

psu i used it's 12vdc

I have checked all my wiring and found that there are no cross connections, the wiring system i use is as follows: VIDEO - + Brown/white Brown solid POWER - + All remaining All solid colour strand colour/strip strands The DVR is switching on and all the functions appear to be also working i haven't connected any camera to it to test yet. However looking back at the initial phase of the installation, I ran out of cat 5 cable for one of the cameras. I ended up using a very cheap cat 5 cable on one of the cameras, although it said cat 5 on the cable. There were no twisted copper pairs inside but thin 8 thin strands the colours were also different no stripe pairs just solid colours i still made sure that both ends i.e camera and DVR ends had the matching colour strands. When you strip them, there are very thin silver wires not as thick as the copper cables in the cat5 twisted pair, could this have a reason for the surge in voltage you mentioned from the DVR. (looking back it, i think it was a very noob move and i wish i hadn't done it) I will replace the cable. The DVR is brand new I've used the same DVR many times using the same wiring configuration i mentioned above for other installations. Thanks again for your input..

unfortunately at the time i didn't realise there was this labeling error, DVR was plugged in i heard a pop sound, when i checked my cameras all 10 of my cameras were gone.

Hi What will happen if these balun in the picture with the different polarity marking was connected. (See image) will it damage the camera or simply not allow any video feed until u correct the polarity but won't damage the cameras.

I haven't because the LED lights where on for each of the channels under the fuses. So i assumed the fuses where ok. But your right, i will need to check that . However i don't understand why the cameras wouldn't come on when plugged into a external handheld CCTV monitor. i was working that day literally 24hrs and all I was trying to figure out was why the cameras weren't working.

Hi I recently started a CCTV installation which consists of 10 700tvl cameras and I ran into a problem which i am hoping someone can detect where i went wrong so i can sort this issue out. Apologies for the long explanation, i would really appreciate your knowledge in this matter. WHAT I DID. I used twisted cat5e cables along with Balun connectors to do the cable run. The distance from the furthest cameras to the DVR is approximately 40m. The rest of the cameras are well under 20m. The cameras i use are standard analogue camera which are under 1amp. I used a 18ch 20A Power supply box to provide power. I used the cat 5e cable for video and power. One of the twisted pairs were used for video and the other 6 strands divided into 3 for power. At the DVR end i connected the Balun made sure the polarity is correct at both ends (solid colours for positive and stripes for negative). However for one camera i used a cheap cat 5e cable as i ran out of the twisted copper one's. (I regret using this cable now) The cheap Cat 5e cable had those thin silver strands of wire inside they were not copper and the colour for the strands where different and weren't twisted. I still made sure the polarity was correct at both ends. Here is where I encountered the problem. The cable for the power supply was those cables we use for PC it had a EU/US socket i.e the two prongs, so I connected a converter for UK sockets which had a 13a fuse inside. When i plugged in the socket i heard a pop sound i don't know if it came from the long plug extension or the PSU. Bare in mind the PSU power on/off switch inside the PSU was not on at the time when i heard the pop sound. However when I did switch on the PSU, I noticed i have no video. The power supply was on and all channel LED light were lit. I then checked the Balun connectors on the DVR and they were all connected. I checked the cameras with my handheld CCTV monitor and I noticed I wasn't getting any video feed at all just a blue blank screen. I tested three cameras and the same problem. Initially i thought maybe my handheld monitor needed charging so I tested it with a spare camera. Soon as i connected the spare camera to the monitor i got the video feed off the spare camera. I haven't checked all 10 cameras yet but i am assuming the worst that all the cameras have busted. My questions are: Where do you think i made the error? Was it because of the cheap cat5e cable i used for one of the camera? What caused the camera's to go "faulty"? How would i go about troubleshooting this problem? I just ordered some new cameras and also 2x 5way splitters with 2x 5amp power supply so i can divide the 10 cameras into 2. Ideally i would of liked to use the PSU box however I am having to do this as the customer really wants the installation to be done by the week and i am not sure if i should use the existing PSU or if the way i connected the cat5e directly into psu box was something i should of done in the first place or instead maybe use dc pigtails. Thanks for reading my post and any help will be greatly appreciated..