I'm confused.
Originally Posted by
op
I followed the directv dish coax and see that they used a grounding block at their point of entry, which is attached to the house's main ground.
This MUST be done. It really doesn't have to be done at the point of entry. It can be done within a few feet from entering the structure or it could be done at the mast.
What this does is make all power, telephone, plumbing, electrical to all have the same reference. If the coax received a hit, it travels to the building's reference and doesn't disturb it relative to everything else.
Antenna's don't get grounded. They would not work if they were. The BALUN transformer will isolate the coax ground from the antenna.
The MAST get's bonded.
Say a power line fell on the mast. That's a good reason to be bonded to the building electrical system. In many cases it may not be possible.
The mast getting bonded to a ground rod would protect against a lightning strike. It doesn't protect against one side of the house (the ground you walk on) to be at the same potential as the other side of the house (ground you walk on).
Yes, this happens during thunderstorms. If the mast was bonded it would not cause you grief.
With your direct TV system up there, I think you would want to have that connected to the same ground as the house.
Your house should have a ground rod and have he plumbing system grounded, but older houses do not. Water systems would be grounded within a few feet of entry, so if the wire had to run 40' in the basement it would.
The whole idea is everything must reference one point. There can be multiple ground rods. I think they need to be at least 6' apart and connected with a wire with no splices. Water pipes must be used too if present.