OPR lightning protection systemsExternal lightning protectionMain catalogABB OPR lightning protection systems | 1Lightning mechanism and location 2Lightning protection technologies 3Lightning protection risk analysis 8Lightning protection tec

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GI Earthing Vs Copper EarthingAs per IS 3043, the resistance of Plate electrode to earth (R) = (r/A) X under root(P/A).Where r = Resistivity of Soil Ohm-meter.A=Area of Earthing Plate m3.The resistance of Pipe electrode to earth (R) = (100r/2πL) X lo