[TowerTalk] ground rod spacing

[jimlux]

Jim Hoge wrote:
> What does the NEC have to say about the number of ground rods used in a single 
> point grounding system where the building is surrrounded by a ground wire? Is 
> there a required minimum and maximum spacing between the ground rods? Is there a 
> required depth the perimeter wire is to be buried?
>

NEC doesn't say anything about multiple rods, other than they have to be 
  bonded together.   (and, of course, that a rod can't be the sole 
grounding means in a new installation)