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Effect electrode diameter resistance
Diameter rod
One common misconception that the diameter
of the rod has drastic effect lowering earth
resistance.
Rod
Diameter
100%
0%
1/2” 3/4” 1/4” 1/2” 3/4” 2”
80%
60%
40%
73
.
This one the ways ensure that you don’t
waste money over-dimensioned rods. This not true! the graph shows,
you only lower the resistance value 9.
Thus the rationale is: Use the most economical
rod that soil conditions will allow you drive.5% by
doubling the diameter the rod (which means
increasing the weight and the cost the rod by
approximately 400%)
