A common method for measuring the resistance of a grounding system is the Fall-of-Potential test, also known as the 3-point or 3-pole test. This involves injecting a current into the ground at a distance from the grounding system under test, and then measuring potential at different points between the grounding system and injector electrode.
In this article, we demonstrate how to perform a Fall-of-Potential test, using the AEMC® Ground Resistance Tester Model 3640, the simplest and easiest to use member of our Ground Resistance Tester product family.
