When a ground resistance test is not performed, how far apart must two or more electrodes be installed?

The requirement for the spacing of electrodes when a ground resistance test is not performed is based on ensuring the effectiveness of the grounding system. Installing electrodes too close together can result in an inadequate grounding system, which may not provide proper fault current dissipation.

In Washington State, the standard stipulates that if a ground resistance test has not been conducted, electrodes must be installed at least 6 feet apart. This distance helps to ensure that each electrode can operate independently, reducing the risk of interference from neighboring electrodes during fault conditions. This spacing is significant for maintaining the integrity and reliability of the grounding system.

The other distances, such as 5, 8, and 10 feet, do not align with the established regulation, which emphasizes the need for a minimum separation to enhance safety and functionality in grounding applications.