supply of copper and earthing material for new cns sites at raja bhoj airport, bhopal -1 copper plate: at least 600mmx600mmx3.15mm ( thickness ) , purity must be atleast 90% 2 copper strip: at least 25mm x 3mm ( thickness ) , purity must be atleast 90% 3 copper wire ( non stranded ) : at least 4mm diameter, purity must be atleast 90% 4 copper rod: 1 inch dia x 5 feet length, purity must be atleast 90% 5 insulated copper wire: pvc insulated copper cable of 50mm square cross section, purity: must be atleast 90% 6 copper clad rod: 10 feet length x ¾” diameter, purity 3mm copper coated steel rod 7 gi pipe: 2 inch dia x 30 feet length, purity: not less than 3 mm 8 gi pipe: 2 inch dia x 15 feet length, purity: not less than 3 mm 9 pvc pipe: 2 inch x 20 feet, purity: uv resistant 10 pvc pipe: 40 mm dia x 10 feet lenth, purity: not less than3 mm thickness heavy duty n 11 pvc pipe: 40 mm dia x 10 feet lenth, purity: not less than 5 mm thickness heavy duty 12 heavy duty pvc pipe plastic corrugated hose: 4 inch dia 13 heavy duty pvc pipe plastic corrugated hose: 2 inch dia 14 cable tray: at least 6” x 10 feet x 18 gauge, purity: not less than 12 swg 15 salt: granular, purity: about 1-3 cm granules 16 charcoal: granular, purity: about 1-3 cm granules