I will be running the wires in the wall/ceiling cavity as you suspected. I was aware of the benefit of crossing electrical at 90 degrees, but not re keeping a space between the video feeds, why is this important? I'm 90% sure I'll be drywalling the ceiling, the house is a split entry bungalow that we built last September. I just don't like the look of drop ceiling especially considering the basement is wide open, and immediately visible upon entering the house. As such, I plan to run a 2" conduit (central vac pipe, plumbing pipe... whatever's cheapest) and I'll feed a double length wire into the conduit to ease future expansion.
