What is strip Earthing
In this type of earthing, a copper strip or GI Strip of minimum cross-section 25 mm × 1.6 mm is buried horizontally inside the Soil or ground, For this purpose around conductor can also be used and at that case the minimum cross-sectional area for copper conductor would be 3 mm² and for galvanized iron conductor it would be 6 mm². The buried portion of the earthing electrode that is either script or round conductor should be long enough to provide required minimum resistance to the earth path. Generally the length of the conductor inside the ground is maintained more than 15 m. The buried earthing conductor should be widely distributed as possible preferably in a single straight trench or in a circular trench or in a number of trenches radiating from a point. This type of earthing is mainly used in rocky area where excavation work is quite difficult.
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