PROVN OF EARTHING AND LIGHTNING PROTECTION SYSTEM (LPS) FOR BLDG NO P-194 AND IMPROVEMENT OF EARTHING AND UNSERVICEABLE CABLES/LT PANELS AND CONNECTED ITEMS OF INSTLNS AT RATNUCHAK MIL STN UNDER GE KALUCHAK

S&F in repair Air termination, single pointed copper rod 12mm dia and 300mm long and fixed complete all as specified and as directed.

S&F Copper strip 32mm x 6mm fixed on suitable size porcelain insulator and screws/nuts/washers for extension of roof conductor or down conductor above ground on wall complete all as specified and directed.

S&F GI Pipe,Medium grade 32mm dia bore for installation of air termination rod all as required and directed.

S&F Test point terminal block made of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed incl 3 nos. 8mm dia 25mm long hex.Head screw. complete all as specified and directed.

Supply, installation, testing and commissioning of chemical earthing system using 90x60cmx5mm copper earth plate as electrode and 50x6mm copper earth strip conductor in accordance with IS 3043 and IEEE 80 standards. Technical Specifications of Earthing electrode copper plate of size 900 mm (L) x 600 mm (W) x 5 mm (T), Copper Strip of 50 mm (Width) x 6 mm (Thickness), copper material of electrolytic copper, chemical compound of high conductive earthing, pit size of 1.2 M (L) x 0.9 M (W) x 1.5 M (D), earthing resistance is below 5 ohms, chemical earthing compound, charcoal/bricks bats, water, clamps, bolts and nuts, earthing lead etc all as specified and directed.

Supply, installation, testing and commissioning of chemical earthing system using 90x60cmx5mm copper earth plate as electrode and 32x 6mm copper earth strip conductor in accordance with IS 3043 and IEEE 80 standards. Technical Specifications of Earthing electrode copper plate of size 900 mm (L) x 600 mm (W) x 5 mm (T), Copper Strip of 32 mm (Width) x 6 mm (Thickness), copper material of electrolytic copper, chemical compound of high conductive earthing, pit size of 1.2 M (L) x 0.9 M (W) x 1.5 M (D), earthing resistance is below 5 ohms, chemical earthing compound, charcoal/bricks bats, water, clamps, bolts and nuts, earthing lead etc all as specified and directed.

M&L Earthing in replacement complete with galvanised steel earth plate electrode 60cmx60cmx6.0mm thick, burried directly in ground to a depth not less than 2.25 metres deep below ground level with top edge of earth plate not less than 1.5 metre below normal ground level surrounded with adequate quantity of charcoal dust mixed with salt to a packed thickness of 15 cm all around the plate, using GI strip 32 x 6 mm as earth strip electrode bolted or rivetted to earth plate at one end and connected to equipments at another end, GI earth strip encased in and including 40 mm dia GI 'light grade' pipe from upper end of earth plate upto equipments,20 dia bore GI pipe 'light grade' as water pipe from earth chamber to upper edge of earth plate, Test point , GI funnel with wire mesh fixed on water pipe and PCC 1:2:4 type B-1 (using 20mm graded stone aggregate) as in pit chamber and RCC pit cover 50mm thick precast RCC 1:2:4 type B-1, duly reinforced with MS TMT bars 8mm dia @ 100 c/c both ways with 10mm dia MS round bar as in lifting handles, excavation, earth work including laying the GI pipe concealed in floor/wall all as described in electric plate of SSR Part I complete all as specified and directed and testing on completion.

M&L Earthing in replacement complete with copper earth plate 60cmx60cmx3.15mm thick, burried directly in ground to a depth not less than 2.25 metres deep below ground level with top edge of earth plate not less than 1.5 metre below normal ground level surrounded with adequate quantity of charcoal dust mixed with salt to a packed thickness of 15 cm all around the plate, using copper strip 20 x 3 mm as earth strip electrode bolted or rivetted to earth plate at one end and connected to equipments at another end, copper earth strip encased in and including 40 mm dia GI 'light grade' pipe from upper end of earth plate upto equipments,20 dia bore GI pipe 'light grade' as water pipe from earth chamber to upper edge of earth plate, Test point , GI funnel with wire mesh fixed on water pipe and PCC 1:2:4 type B-1 (using 20mm graded stone aggregate) as in pit chamber and RCC pit cover 50mm thick precast RCC 1:2:4 type B-1, duly reinforced with MS TMT bars 8mm dia @ 100 c/c both ways with 10mm dia MS round bar as in lifting handles, excavation, earth work including laying the GI pipe concealed in floor/wall all as described in electric plate of SSR Part I complete all as specified and directed and testing on completion.

M&L under ground XLPE insulated, screened, PVC bedded galvanized steel strip or wire armored, electric power cable (heavy duty) with aluminium conductor, 1100 volts (earthed) grade cross sectional area 400 sqmm, 3.5 core laid in trenches/ pipes/ ducts/ wall/ boarings with necessary cable lugs and glands, nuts, bolts and washers etc and testing including disconnecting and taking out of existing LT cable of any type and size complete all as specified and directed. Note:-Excavation and earth, sand coushioning and protection for cable work shall be measured and paid separately.

All as per item No. 09 here-in-before but cross-sectional area 240 sqmm, 3.5 core complete all as specified and directed.