Determining a Good Electrode Location

A good, low-resistance earth electrode depends upon a low-resistivity soil in a spot where you can drive in your electrodes.

There are two approaches to picking your location:

  1. Drive rods in various locations to such depths as may be required and test their resistances while they are being driven.

  2. Measure the earth resistivity before driving ground rods. Then calculate the number and length of rods required.