Abstract
The purpose of this paper is to study on depth of A-Class earth electrode for maintaining the earthing resistance of electrical installation. IEC, BS, NEC, NESC were investigated and compared with KEC regulation, for soil temperature (freezing or frostline), earth potential, and moisture effect (drying). Furthermore, we demonstrate the effect of water and temperature on the depth of the earth electrode was tested. In addition, the effect on moisture and temperature according to the depth of the earth electrode was tested. Based on the result of this study, it is intended to derive the depth of the earth electrode that is safe and reliable in electrical installations.
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