The limitation of earthing to one point on each system is designed to prevent the passage of current through the earth under normal condi- tions, and thus to avoid the accompanying risks of electrolysis and interference with communica- tion circuits. With a suitable designed system, properly operated and maintained, earthing at several points may be permitted. This method of earthing becomes economically essential in systems at 200 kV and upwards. We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals.