Soil Resistivity Testing for grounding
system design utilizing
the " Four Point Wenner" Method to determine the resistivity
of the soil. Typically, this test is performed
before site construction. The data is used to
design a grounding system that will achieve target
resistance. Reports containing soil data and
grounding recommendations are delivered within 24
Ground Resistance verification testing
is needed after installation of the grounding system.
This test should be performed on every site to verify
if the grounding system has met the equipment manufacturer's and
end-user's requirements, typically 5 ohms or less.
Test method is "Fall of Potential"( 3 Point Method) or
clamp on method (only in special circumstances). This
test should be performed before the site connected
to utility power. Once the site is constructed, ground
resistance tests should be performed annually. Reports
with recommendations for corrections if necessary
are delivered within 24 hours. Grounding system
drawings or description requested.