"In Rod Earthing system of earthing 12.5 mm diameter solid rod of copper or 16 mm diameter solid rod of galvanized iron or steel; or hollow section 25 mm GI pipes of length not less than 2.5 meters are driven vertically into the earth either manually or by pneumatic hammer. In order to increase the embedded length of electrodes under the ground, which is sometimes necessary to reduce the earth resistance to desired value, more than one rod sections are hammered on above the other. This system of earthing is suitable for areas which are sandy in character. This system of earthing is very cheap as no excavation work is involved. For more information on earthing rods and GI wire etc log on to our website http://www.atulcasting.in/ . "