bids are invited for sitc of conventional earthing system at igia new delhi 1 16 copper strip isi mark size 25mm x 3 mm including connection with brass nut bolt spring washer etc for use outside the building , pvc pipe 40mm dia of standard , gi pipe 50mm dia length 12 mtrs additional required , multi strand single core pvc insulated copper cable 16 square mm as per is694 with cupper lungs 16 nos with appropriate size with brash nut bolts and spring washers etc , earth pit of the size of 1 meter diameter and 3 meter depth shall be excavated after depth of 3 meters the size of excavation shall be 900 x 300 x 900 mm depth , a 450 x 450 x 450mm concrete box with smooth cement plaster finish shall be provided on the top of the pit a concrete lid painted black approx 50 mm thick with pulling hooks to cover the earth pit , 600 mm x 600 mm x 3150 micrometer pure copper plate purity not less than 99 percent lab purity certificate should be attached , copper bus bar purity not less than 99 percent 450 x 25 x 6mm min dimension with brass nut bolt spring washer etc 13 holes at equal distance , sub cupper bus bar purity not less than 99 percent 150 x 25 x 6mm having 4 holes with brass nut bolt spring washer etc for inside building connections , gi pipe with funnel for watering 40mm dia and 4meter length holes of 12 mm dia within 15 cm from bottom upto 2 meter height , charcoal , salt , installation including brazing rivating and welding 120 degree bends fitting fixing clamping accessories etc , marking of all earth pit with proper displaying metallic flag two feet above the ground and marking earth pit number by yellow paint on black colour paint total quantity : 5703