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?