Soil Resistivity Testing

Soil resistivity data is the basis of any predictable grounding system design. It represents the resistance of the earth to the flow of electrical current. Soil resistivity is determined by the type of soil and its moisture and electrolyte content and temperature.

Two methods are available to determine the resistivity at a particular location. The most common and accurate is the 4-Point Wenner method. The 4-Point method places 4 probes in the earth. A current flow is established through the outer probes and the resulting voltage drop is measured across the inner probes.

Several locations should be tested. Remember that the data is being used to design the ground system and predict the performance after installation. The more data available, the more confidence you can have in the prediction.

Soil samples can also be bench tested by Lyncole. The obvious limitation is that only a small amount of soil is tested. If several samples are collected from different depths and different locations at the site, an adequate design can be accomplished.

Testing procedures are provided by request. Contact us by phone, or by email.

PHONE: 800-962-2610 

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