Design Consideration of Electrical Earthing System for High-rise Building

Electricity is dangerous and required proper grounding to prevent unwanted voltage from passing through personnel, critical equipment and other nearby metallic objects.Soil resistivity directly affects the design of a grounding system.When designing an extensive grounding system it is advisable to locate the area of lowest soil resistivity in order to achieve the economical grounding installation.Neither very low resistivity nor very high resistivity is safe for human safety under power system fault conditions.The earthing or grounding is mainly affected by soil resistivity.This study will briefly explain the earthing of Lightning Protection System for 11 th storeyed building.The soil type of this building is loam and soil resitivity is 150 Ωm.