Britespark.

if you are in the UK the regulation state that cat 1 and 2 cabling should not be run adjacent to cat 3 cabling anless there is continuous seperation.

the way we do it is either to put the coax in one conduit or trunking run and the power (12v) in another conduit

if the cameras are for external use you can ( obviously ) run the cabling adjacenmt to the existing 240v ac

basicaly if you run your coax and you 12vdc tgether in trunking you should be within the regulations.

try to keep all data (coax and 12v) away from any high loads IE motor / air con etc if you do run them near the above you will have a few ficture problems.

what DVR are you going for?

i have just ordered a 16 channel with LAN PTZ and CD/RW for a public house CCTV job.

going out tomorow to install a nice little 4 cameras ( colour day/night ) set up on a dry berthing site in town.
i am so looking forward to that job!!

Britspark