On May 4, 5:59*pm, m II wrote:
Bob Miller wrote:
Not sure what you mean by performance, but the NEC code allows for
horizontal rods.

Keep in mind that there is a maximum allowed resistance requirement.
Ten ohms between the rod and ground comes to mind.

I've never thought that sufficient. If you have a 120 volt short circuit
feeding into a 10 ohm ground, you can get a 12 amp continuous current
flowing, with no attendant protection device tripping.

The less the resistance the better.

mike

Re-Write
If you have a 120 volt short circuit feeding into a 1 ohm ground,
you can get a 120 amp continuous current flowing, with no
attendant protection device tripping.

Resistance is Futile : You Will Be Grounded ! ~ RHF