I'm going to be installing a TV antenna with a mast.
I want to make sure I ground everything properly. As far as I can tell, I need to ground the antenna via the coax and a grounding block, and then ground the mast separately.
My house was built in 1969 and has no ground rod. The breaker box is in the center of the house and has a ground wire wound round a cold water pipe in a crawl space. This is nowhere near my antenna installation.
I have cable internet. The coax from this is attached to a grounding block, which is in turn attached to the thermal expansion outlet pipe from my tankless water heater.
It seems I have two options. The first is to follow Comcast's lead and use the thermal expansion outlet pipe for everything. The second is to buy one (or two?) ground rods and use them instead.
Which one is correct? Or are neither correct?
Edit: here's a plan view of the current situation:
Best Answer
The main grounding electrode conductor (the wire running to the cold water pipe) is required to be terminated with a ground clamp. Wrapping it around the pipe is not a good connection.
After fixing the ground clamp add an inter-system bonding block to the main ground wire (they sell these and the ground clamps at any big box store). It clamps onto the ground wire without cutting it. It will have a terminal strip for attaching the ground wires from your cable TV and the TV antenna. Attach those there. The cable TV isn't properly grounded either from what you said.
The TV antenna ground wire can't be smaller than #14 AWG copper wire.
This all in addition to the ADU that Tester mentioned.