![]() Locations where it is not possible to use other types.įor body earthing of all the transformers, Neutral earthing of transformers/ generating sets. (i) For Fire Fighting pumps and water supply pumps. Internal electrical installations like Distribution Board and Meter Boards (in residential quarters), feeder pillars and poles etc. Minimum Sizes of Earthing Conductors for Use Below Ground Round copper wire or copper clad steel wire ![]() Minimum Sizes of Earthing Conductors for Use Above Ground Note : Galvanization of GI items shall conform to Class IV of IS 4736 : 1986. Size of Earthing conductor of the same material as phase conductorĤ0 mm dia 4.50 m long (without any joint) Rising main above 400 Amp and up to 800 Amp ![]() Neutral Earthing of Transformers and GeneratorsĮarthing Strip for Bus Trunking and Rising Mainīus trunking for generating set and LT panel Indoor sub-station with HT panel, Transformer capacity above 1600 KVA, LT panel, D.G Set ![]() Indoor sub-station with HT panel, Transformer capacity up to 1600 KVA, LT panel, D.G Set. ![]()
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