Corrosion Allowance (Earthing)
on an average steel corroded six times as fast as Copper when placed soil. the extent of corrosion depends on the property of soil.
soil resistivity and corrosion
Range soil resistivity Class of soil
in ohm
less than 25 severely corrosion
25-50 moderately corrosive
50-100 mildly corrosive
Above 100 very mildly corrosive
Earthing soil in Delhi
Earthing value depends on soil Delhi