Call Us @ 9711681771 for earthing work Abstract of IEEE-80/ IS 3043 / BS 7430 for earthing The installation process of earth mats in under ground metro stations includes square grids of copper rods and parallel connected copper electrodes. Factors affecting the design of the earth mat Soil resistivity – The size and no of electrodes required in an earth mat system strictly depends upon the soil resistivity value. Soil resistivity varies from 12-300 ohms normally and for larger values we must use satellite earth mat systems. Step touch voltages – The size of one grid depends on the allowable […]
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As most underground metro stations have a limited space/ land area, the earthing system for the auxiliary sub station or the feeder post or the signalling and telecom are inside the station box area, basically 300-1000 mm below the station base level. And for an earthing system which is very close to humans, we should consider the touch and step voltages that will come into effect during the fault. (For more details read GPR and step-touch voltages) That’s why the preferred earthing is Copper electrode grid earthing (also known as copper earth mats) For a good soil strata the soil […]
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IS 3043 – IS CODE for Earthing. To learn and share your knowledge you can contact us, one of our team mate is associated with copper earth mat installations at underground metro Aux Sub Stations. There are always a lack of research or knowledge sharing in the field of earthing and electrical safety. In India the risk of electric hazards are way more than that of western countries. Infrastructure companies have started understanding the importance of earthing and safety measures they need.