So you can run standard sheathed speaker cable side by side with the cctv video for 100-150 feet all the way back to the head end and it doesn't interfere with the surveillance (or HDTV component video)?

I spoke to a tech from a national distributor and he told me that I should run the 70v in another conduit because it's considered high voltage. That's not going to happen because it takes a lot of effort to set up the emt, and so we have to be efficient as possible, that is using the same (1/2 and 3/4) conduit for both speaker and camera wire. All of the runs will hit several main junctions and there's a 2" conduit that leaves this box and so the wire will be all PILED up in these 2" trunks before they hit the rack location. There's no plastic, all of the cables will be inside of closed steel boxes or emt.