When I was a cable tech contractor I was told that you didn't need to bury a coax drop, you just needed to cover it. I have since learned that the guy who taught me had no idea what he was talking about. I am no longer a cable-guy but on Sunday a cable tech is coming out to replace my drop. I'm going to make him do it correctly or I'm going to complain to COX. So please, how deep does it need to be according to the NEC?