The burried 5/8' copper tubing circles our entire home.
The 4 corners all have 8' grounding rods.

All connections to the ground ring are Calwelded.

This is a suplamental to the required NEC ground.

The utility has the required 28' grounding rods.

The entry point for antennas and the mast for VHF/UHF
disk cone has a 8' ground rod and this is bonded
to the ground ring and the utility grounding rods per
the NEC.

The Dallas Lankford "15' Relay Switched antenna"s
each have their own 8' grounding rod, but becuase
there is no direct connection to the house ground
system. By "no direct connection", I mean the
secondary of the transformer is isolated with no
connection to the primary.

I changed "ground rods" to "grounding rods" at the
request of our commercial electrician.

Terry