[TowerTalk] copper or galvanized ground rods in red SC clay

[jimlux]

On 1/9/16 10:47 AM, Kelly Taylor wrote:
> Here's an interesting question: if the concrete base is an effective ground connection, do you get more value by placing the rods a rod length away from the base?
>

Yes..
just on a superposition of currents basis, you'd say this, without 
getting into non-linear effects.

The real question would be "how far"

If you think about the current flowing from a rod or block of concrete 
or metal plate.. close up, it's sort of uniform, but in the "far field" 
(to borrow an antenna term) it's spherical.

Rods are usually modeled as a line source: a cylinder with a hemisphere 
on the bottom.

A plate (or a cube) would be a bit different.  Maybe you could model it 
as a hemisphere