On 16 Sep 2006 23:41:55 -0700, "BobK207" wrote:



If a small diameter ground rod (1/2" or 5/8") doesn't give the 25 ohms
(or less) to ground.....would a larger (3/4" or 1") diameter rod in the
same soil do better?

Is the soil the culprit or the soil / rod contact resistance? The
larger diameter rod contacts more soil..better grounding behavior?

cheers
Bob


IMHO,

I've found (through discussing with electricians) that soil conditions
have a greater effect on grounding effects, when comparing 1/2 to 1"
rods.

Remember, if you are concerned about resistance for code, just drive
the second rod. Then you don't even have to check ohms, since even if
you don't have the min, the code only requires a second rod.

The idea is that everyone grounds the 'neutral' the voltage on teh
grid will be 'stablized' so you are only adding a drop to the bucket
(the grid) and helping your line to your house.

FYI: Ground rods aren't for ground faults.

later,

tom @ www.BlankHelp.com