supply installation testing commissioning for conventional earthing system and lightning protection system at new atc tower cum technical block at s v airport raipur , removal of earth from ground level and digging of earth pit and filling with black cotton soil , installation of gi pipe in the earth pit laying of the earth conductor and high insulation pvc sleeves for the copper conductor . , earth electrode copper plate size 700mm x 700mm x 4mm , salt , construction of masonry work ( inspection chamber ) , laying of earth conductor from the earth pit to the main earth inside building dimension 25mm x 3mm and copper purity 99 . 99percent , charcoal , equipment bus bar , bared copper wire 4 sq mm copper purity 99 . 99% , earthing system inspection chamber , lightning arrestor rod 3 feet height diameter not less than 25 mm with five spike . ( putity of copper 99 . 99% for both ) , gi pole of 3 inch dia . 6 meter length , lightning copper cable down conductor 50 sqmm copper purity 99 . 99% , multistrand copper cable 25 sqmm copper purity , installation including laying of copper strip and copper cable ( 2500 m ) in different offices .