I'm starting a CCTV job tomorrow in a small (30K sqft)warehouse using analo= g cameras over cat5. Up till now I've used siamese coax and 12vdc. I typica= lly do more residential work than commercial so I usualy don't have to worr= y about voltage drop.=20
On this system I'm installing 10 inside cameras all with IR LED's. Each cam= era draws 700ma with IR LED's on. I've got 5 cameras that will be in the re= ar of the warehouse where there are no power outlets so the cameras will be= aprox 100 to 150 feet from the 24vac power source. I bought Balun's with s= crew connections (rather than an RJ45 connector) for the Cat5 so that I cou= ld use six of the conductors for the power, giving me aprox a 19 guage wire= . I figure that should give me a voltage drop of about 2 volts which is les= s than 10% of 24volts required by the cameras. I didn't do any research on = what affect the distance of 150 feet over a 24 guage wire would have on the= video signal. I don't think it'll be a problem but I can always switch one= of the voltage wires over to the video terminals.=20
I'm just looking for some comments, suggestions and possible problems that = I might not have thought of when using Baluns and Cat5 Any comments about l= onger distances using Cat5 would be appreciated also. I've got a couple mor= e larger warehouse jobs coming up so voltage drop is going to be a bigger i= ssue