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This method is not as accurate as 3-Point method (62% method) because it is
particularly affected by the distance between the tested electrode and the dead
ground or water pipe. This method should not be used as a standard procedure
but as a backup in congested areas.
Procedure:
■ Short X and Xv (E, ES).
■ Short Y and Z (S, H).
■ Connect X to ground rod to be measured.
■ Connect Z to an electrode.
■ Measure as in the 3-Point method.
Ground
Utility
level
pole
Butt plate
Digital Ground Resistance Tester Models 4620 & 4630
Grounding conductor
Ground
rod
Terminals shorted
Figure 16
Metallic Water Pipe
(Y-Z shorted)
Ω
15
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