Yes, you can run both in the same conduit/box.Can I run both thru the same box? I plan to put a ground rod outside where my receiver is and run a #10 coated wire over to my breaker box ground on the other side of my house.
Better quality than what? The coaxial shield is grounded, it won't care if there's a ground wire in the same pipe.Should I use a better quality shielded Coax? Thanks, Tom