Corrigendum - Supply Of Copper Earthing Materials For Dvor In Cns At Gaya Airport-1 Copper Plate At Least 600Mmx 600Mmx3.15Mm ( Thickness ) -Not Less Than 90% Purity Of Material 2 Copper Strip At Lest 25Mmx3mm ( Thickness ) -Not Less Than 90% Purity Of Material 3 Copper Wire ( Non Stranded ) -At Least 4 Mm Diameter-Not Less Than 90% Purity Of Material 4 Copper Rod ( 1 Inch Dia X 5 Feet ) -Not Less Than 90% Purity Of Material 5 Insulated Copper Wire ( Pvc Insulated Copper Cable Of 50Mm Square Cross Section ) -Not Less Than 90% Purity Of Material 6 Gi Pipe ( 2 Inch X 30 Feet ) -Not Less Than 3 Mm 7 Pvc Pipe ( 2 Inch X 20 Feet ) -Uv Registant 8 Pvc Pipe ( 40 Mm X 10 Feet ) -Not Less Than 3 Mm Heavy Duty 9 Heavy Duty Pvc Pipe Plastic Corrugated Hose ( 4 Inch Dia ) 10 Salt ( Granular ) -About 1-3 Cm Granules 11 Charcol ( Granular ) -About 1-3 Cm Granules 12 Cable Tray ( At Least 6” X 10 Feet X 10 Guage ) -Not Less Than 12 Swg 13 Extension Board ( 4 X 5 / 15 Amp With Individual Switch With 25 Meter Using 3 X 1.5 Sq Mm Copper Conductor Armoured Pvc Sheathed ) 14 Bamboo Disposable Ladder ( Minimum 20 Feet ( 200 Kg Capacity ) ) 15 Self-Supporting Heavy Duty Folding Aluminium Ladder ( 2 Cross Leg Minimum 15 Feet ) 16 Battery Stand ( To House 4 X 120 Ah ) 17 Heavy Duty Pvc Pipe Plastic Corrugated Hose ( 1 Inch Dia )