supply of earthing and lightening arrestor materials for cns , nav-aids at hyderabad airport , begumpet -1 copper plate: 2 copper strip: 3 copper wire ( non-stranded ) 4 copper rod ( lightening arrestor ) 5 insulated copper wire: pvc insulated copper cable of 50mm square cross section, purity not less than 80% 6 copper clad rod: 10 feet ( length ) x ¾ inch ( diameter ) , 3mm copper coated steel rod 7 3 core electrical cable: 3 x 2 sq mm multi strand copper conductor pvc sheathed, purity not less than 70% 8 gi pipe: 2 inch x 15 feet, not less than 3 mm 9 heavy duty pvc pipe plastic corrugated hose: 2 inch dia 10 salt: granular, about 1-3 cm granules 11 charcoal: granular, about 1-3 cm granules 12 power supply extension boards: each having 4points with individual switches with 5 / 15a, 35m length, 3x1.5sqmm copper conductor. armored pvc sheath 13 self-supporting heavy duty folding ladder: 2 cross leg minimum 6feet 14 battery stand: each to house 4x120ah 15 pvc pipe: 40 mm dia x 3 m long x 5 mm thickness 16 weather proof box: 2feet x 2 feet x 8inch 17 multi strand braided copper wire bare ( copper rope ) , area at least 70sq.mm 18 frp ( fiber reinforced plastic ) poles: 100mm dia., 5mm thickness, length 4 meters 19 brass pully nfor running at least 10mm multi strand copper braided wire: dia 3 inch 20 strain insulator glass / ceramic: 6 inch 21 straining screws with anchor bolts 22 steel guy wire 23 bull dog grips for 8mm steel / copper rope 24 gi ground fixing for frp poles