ArmedRN

I'm installing a DVR system with 16 camera's but I can't figure out how to get all the wiring through the exterior wall cleanly. I have set up small 4 cam systems before and just run it into the attic and then down but I don't have an attic in this house and will need to bring it in though the exterior wall. I don't want to cut a 6" hole in my wall to run the cables and power through but can't seem to find any box that is made for this purpose. How do the pro's do it?

This is for home. So I went and found the system in the garage and this is what I have, one dvr, 16 camera's, 16 cables with power supplies and 4 power supplies.