What is the Best Soil Resistivity Testing Method?

What is the Best Soil Resistivity Testing Method? - E&S Grounding Ask the Experts
  • We use the shallow spacing data to determine the resistivity of the deeper resistivity
  • We cannot increase our spacing between pins at a ratio greater than 1.5 or else we get errors. In other words, you cannot move from a 10-ft spacing to a 20-ft spacing without placing error in the math. You must have a 15-ft spacing reading in between the two in order to get accurate math. In fact a ratio of 1.33 is preferred.
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