R
The National Electrical Code requires
lightning protection ground rods to be
separate from the power line safety
grounding electrodes. As discussed later,
however, all grounding systems must
eventually be bonded together.
...
In most stations, dc ground and RF
ground are provided by the same system.
If you install ground rods, however, bond
them to each other and to the safety ground
at the electrical service entrance.
...
Some think
that RF grounds should be isolated from
the safety ground system — that is not
true! All grounds, including safety, RF,
lightning protection and commercial communications,
must be bonded together in
order to protect life and property.