Soil resistivity test with using 4 terminal earth tester(Megger)

Soil resistivity test is most important any industrial installation.This test doing before electrification of the project. earth resistivity reading used for designing no of earthing and earth conductor . we can use 4 terminal earth tester .we cannot use 3 terminal earth tester. #ayanaelectricals #soilresistivity #earthtester #earthreading #industriyalearthing #meggertester #earthing #pipeearthing #plateearthing