What Is Earth Resistance?

Earth resistance is defined as the resistance offered by the electrode of the earth to the flow of current into the ground. The mathematical representation of the earth resistance is:

Earth resistance = (Potential of the earth electrode) / (Current)

Earth resistance = (V) / (I)


  • V is measured in voltage and is a voltage spike
  • I is the current which is injected during the earth resistance

The earth resistance increases with depth and is dependent on the temperature.

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