Repair Maint of certain lighting arrestor and earthing at AF Stn Singarsi under AGE I AF Singarsi

Amount

Taking down old unserviceable air termination of any size and rating from any location complete all as specified & directed by Engr-in-Charge.

Taking down old unserviceable strip of any type, size, and location complete all as specified & directed by Engr-in-Charge.

Taking up or down steel tubing of size 40mm and connections, including cleaning for refixing or removal to store completed all as specified and directed.

M&L for air termination 300 mm long 12 mm dia copper rod, single pointed fixed on 40 mm bore light grade GI tubing 01 mtr long fixed on roof including provision of base & fixing by means of nuts and bolt etc complete all as specified & directed.

M&L for copper strip ( 20 x 3.15 ) mm fixed with saddles and screws etc for roof conductors and down conductors above the ground level complete all as specified & directed.

M&L for 40 mm mm dia steel tube ( light grade ) galvaanized with fittings laid in trenches/ wall/roof for protection of earthing / lightning strips for crossing the roads / fixing on walls etc complete all as specified and directed.

S&F in repair for test point terminal box made out of gun metal or phosphorus bronze size 75 x 75 x 25 mm drilled and screwed including 3 Nos 8 mm dia 25 mm long hexagonal heads screw, complete all as specified and directed.

M&L for Earthing complete with pipe in pipe technology concept involves two mild steel pipe one small dia pipe (41.9mm) is inserted in a large dia pipe (76.2mm).The fitted pipes are subjected to Zinc coating /copper plate /alloy coating /Hot dip galanization ,80-100 micron on the inner/outler Electrode 3 mtr long .The space inside the Conductolite are filled with a specially developed high conductive and anti corrosive mixture called crystaline conductive compound . The out side of the outer pipe should be filled with BFC (back filling compound)including connecting the main earth lead to the earth pipe by means of nut & bolts with washer etc. The job includes digging of bore size 10'' by 11 feet depth for installing and including provision of FRP Earth pit cover (250x250x2mm) for protection and safe guard of terminals all as per model No :ASEEL-39 make Elmech or equivalent complete all as specified and directed by Engr-in-Charge.

M&L for Earthing complete with copper earth plate electrode of size 600 x 600 x 3.15 mm ,buried directly in ground (earth pit not less than 2.25 mtrs below normal ground level)with top edge of earth plate not less than 1.5 mtr below normal ground level, connected to copper earth strip 32X6mm for below ground level & 20x3 mm copper strip for above ground by means of bolts ,nuts ,check nuts of copper including 40mm dia GI pipe med grade for protection of earthing strip excavation and earth work in any type of soil, charcoal salt filling 15 cm around the earth plate as shown in electrical plate no 3 of SSR part-I 2004, 20 mm bore, GI watering pipe medium grade 1.50 mtr long including making pit with PCC 1:3:6 type C1 and pre cast RCC cover 40 mm thick, reinforced with 8mm dia deformed bars @ 100 mm c/c both ways with lifting handles and funnel etc including testing complete all as specified and directed by Engr-in-charge.

M&L for Earthing complete with GI earth plate 60x60cmx6mm thick electrode and 4mm dia GI wire as earthing lead burried directly in ground (earth pit not less then 2.25 metres deep below ground level ) with top edge of the plate not less then 1.5 metres below normal ground level. connected to galvanised iron strip 25×4mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No. 5 and incl earth work,PCC pit and RCC cover,watering pipe 20 mm dia light grade,funnel,wire mesh,protection pipe 15 mm dia light grade , charcoal dust and salt etc and connected to earthing test point including taking up of old UNSV earthing complete all as specified and directed by Engr-in-Charge.

Supply only common salt commercialas in repaire for above item No 10 in the the process of renewal of existing earthing all as directed.

Supply only Charcoaldust/Breeze in repaire for above item No 10 in the the process of renewal of existing earthing all as directed.

Renewal of existing earthing (GI/copper earthig) with provision of new layers of charcoal and salt all as specified in electrical plate No 5 of SSR Part-I, including cleaning of existing GI/copper earth plate, conductors etc., connecting with new bolts, nuts and washers complete including testingof earthing by digital Earth Ground Resistance Tester & Record submitted to Dept on completion all as directed. Note: -1. Excavation,Returning filling & demolition of PCC Near earth pit included in Coated rate.2. Charcoal, Salt & Gi pipe,funnel paid seperately complete all as specified and directed by Engr-in-Charge.

checking of earth resistance values & earth to neutral voltage of earthing of any type with digital Earth test Resistance Tester & record to be submitted each month for eleven month to department complete all as specified and directed by Engr-in-Charge.

S&F funnel made out of GI / mild steel sheet 3mm thick in conical shape, dia of the funnel at bottom is 15mm and at top is 75mm, placed on GI pipe for watering the earth including taking out existing funnel complete all as specified and as diirected. Note: The funnel shall be either welded properly to the watering pipe or bolted with bolts and nuts complete all as specified and directed by Engr-in-Charge.

S&F galvanised steel tubing 20mm bore light grade with all fittings in earthing for watering the earth including taking down of old steel tubing complete all as specified and as directed.

S&F in repairs Aluminium strip 25 x 3.15mm with saddles, poecelain insulators in proper gaps and fixing screws etc for roof conductors and down conductors above ground complete all as specified and directed.

S&F in repairs with excavation/returning filling of soil at requred place GI strip 32x6 mm continuity conductor, fixed to wall or recess or burried in ground or drawn in pipe or any other indicated situation or as directed with saddles, poecelain insulators in proper gaps, for connection earth with dough moulded insulation of earth complete all as specified and directed.

S&F GI tubing, light grade of bore 40 mm for mounting of lightning arrester complete all as specified and directed.

S&F only Test Point terminal block, made of gun metal or phosphorus bronze of size 75 x 75 x 25 mm, drilled and screwed complete all as specified and directed.

M&L for providing cement concrete For Earthing pit filling and mass concrete, Type C1- 1:3:6 with 20 mm graded stone aggregate complete all as specified and directed.

Excavation in trenches not exc. 1.5 Mtrs wide and not exc. 1.5 mtr deep and getting out in any type of soil at the place of existing earting/water pipe line all as directed and specified.

Returning filling in including spreading leveling watering and well ramming in layers not exc 25 cm thick all as specified and directed.

Removing of surplus excavated material to a distance not exceeding 50 mtr and depositing where directed at a level not exc 1.5 mtr above the starting point all as specified and directed.

M&L synthetic enammel paint of yellow/red colour for Earthing pit including pit cover As per directed by Eng-in-Charge.

M&L for Pre cast RCC Type B1- 1:2:4 with 20 mm graded stone aggregatefor Earting pit Cover complete all as specified and directed.

Supply and fixing of Onload Change Over switch of metal sheet enclouser with Four pole with advance neutral,conforming IS 13947 (Part-3); IEC:60947-3 suitable for 415 Volt 125 Amp rating AC supply incl. fixing on wall and connection with exesisting XLPE electric cables of any size including lugs complete all as specified and directed by Engr-in-Charge. Cat No IHCNFE0630 of HAVELLS equivalent make and model of L&T/LEGRAND

LALAN SHARMA

M/S KUMAR AVINASH

M/S Subhadip Enterprise

DANATION CONSTRUCTIONS

P .BANERJEE AND CO

M/S AMARNATH AGARWALLA

M/S New Builders Corporation