SPECIAL REPAIRS REPLACEMENT OF EARTHING INFRASTRUTURE AND LIGHTENING ARRESTORS AND PROVN OF ACs FOR OPS AND TECH COMPLEX IN TECH AREA AT AF STN JODHPUR

Amount

Material & labour in repairs for earthing complete with copper earth plate electrode 60cm x 60cm x 3.15 mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5m below normal ground level, connected to and including earth lead of copper strip 20 mm X 3 mm by means of bolts, nuts, check nuts and washers of galvanized iron or steel all as shown in electrical plate No 3 of SSR Part-I connected to earthing test point all as specified or indicated including testing on completion and excavation and earth work in any type of strata, PCC 1:3:6 type C1 in chamber, precast RCC cover 50mm thick in cement concrete 1:2:4 type B1, reinforced with welded steel wire fabric or XPM (Weight not less than 4 Kg/Sqm) with cast iron frame, funnel with wire mesh, 20mm bore GI pipe medium grade watering pipe, lugs, 40mm bore GI pipe medium grade protection pipe up to 7.5m complete all as specified and directed by the Engineer-in-Charge NOTE :- The rate of above Item includes the cost of earth lead and GI protection pipe up to 7.5 Metres. Copper strip beyond 7.5 Metre shall be measured and paid for separately.

Material & labour in repairs for bore earthing 150mm dia burried by vertical boring machine, depth 75 mtr below ground level using earth electrode 50mm dia GI pipe medium grade duly drilled with holes of 12mm dia, 15 cm c/c on both side of the pipe including lowering of GI pipe 50mm dia medium grade in bore well upto the depth of 70 mtr and one meter above the ground level. The pipe electrode should be filled around commercial salt, charcol dust, copper sulphate and magnesium phosphate of 30 cm layer each upto the full length of pipe. The bore well should have 12 meter of length 150mm dia MS pipe 4.8mm wall thickness of protection of bore well, welding of GI strip 50 x 6m on earth electrode, GI pipe 50mm dia upto 10 meter below ground level and 15 meter from the bore well to test point gun metal and PCC foundation surrounding the bore well 60 x 30 x 30 cm, complete all as specified and directed. Note: - If GI strip required more than 35 meters, then length exceeding 35 meters shall be measured and paid separately.

Material & labour in repairs for earthing complete with galvanised steel earth electrode 60cmx60cmx6mm buried directly in ground vertically to depth not less than 2.25m below normal ground level with top edge of the earth plate at a depth not less than 1.5m below ground level connected to and including GI earth strip 32mm x 6 mm, by means of nuts, bolts, check nuts and washer etc, made of GI and connected to test point and earth dolly all as shown in electrical plate No. 3 SSR Part-I 2009 and specified or indicated including excavation and earthwork in any type of soil PCC (1:3:6) Type C1 in chamber, precast RCC 50 mm thick in cement concrete (1:2:4) type B1, reinforced with welded steel wire fabric or XPM (Weight not less than 4.00 Kg/Square metre) with cast iron frame, funnel with wire mesh, 20mm bore medium grade GI watering pipe, lugs, 40 mm bore medium grade GI protection pipe, test point etc. complete all as specified and directed. NOTE :- The rate of above Item includes the cost of earth lead and GI protection pipe up to 7.5 Metres. GI strip beyond 7.5 Metre shall be measured and paid for separately.

Material and labour in repairs for single rod chemical earthing, (comprising of one copper rod, chemical earthing), copper electrode of wall thickness 2mm, not less than 3mtrs length, not less than 75mm outer dia, fixing of copper earth electrode by drilling/boring 175mm dia hole, 5mtr deep in any type of strata, placing electrode in hole, return filling excavated soil by mixing min 60 kg GEL per bore and 160 kg soil resistivity improvement (SRIP) compound as per manufacturer instruction, including PCC foundation surrounding pits of size 60 x 60 x 30 cm complete all as specified and directed by Engineer-In- Charge.

M&L in replacement of 35 sqmm multistranded flexible copper conductor with suitable mounting accessories, the mounting clamp should be non conductive metarial used in earthing complete all as specified and directed by Engineer-In- Charge.

Supply & fix in replacement of test point terminal block made of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed including 3 nos. 8mm dia 25mm long hexagonal head screw as required with all accessories complete all as specified and directed.

Supply & fix in replacement of single pointed air termination aluminium rod 12mm dia, 300 mm long complete all as specified and directed.

Supply and fix in replacement of GI pipe medium grade for air termination rod of size 40 mm dia upto 3.0 mtr long complete all as specified and directed.

Taking down existing aluminium strips and S&F aluminium strip 25 x 3.15mm with saddles and fixing screws etc. for roof conductors and down conductors above ground complete all as specified and directed.

Taking down existing copper strips and S&F copper strip 25 x 3.15mm with saddles and fixing screws etc. for roof conductors and down conductors above ground complete all as specified and directed.

S&F copper strip 32x6 mm with saddles and fixing screws etc. for roof conductors and down conductors above ground complete all as specified and directed.

Taking down existing GI strips and S&F GI strip 32x6 mm with saddles and fixing screws etc. for roof conductors and down conductors above ground all as specified and directed.

M&L for PCC block of size 150x150x300mm made up of PCC 1:2:4 type B-2 Blocks for fixing/ mounting of running earthing conductor complete all as specified and directed.

M&L in replacement of kota stone earth pit cover(2x2 feet) complete all as specified and directed.

Supply and lay of pipe galvanized, medium class, including necessary fittings, of 15 mm (1/2”) dia complete all as specified and directed.

S&F gun metal gate valve including fittings 15 mm (1/2”) dia complete all as specified and directed.

S&F self closing tap of cast iron or malleable cast iron, galvanised, screwed for iron pipe and fixed 15mm bore complete all as specified and directed.

M&L for cutting of existing steel tubing for alteration or additions of size 15 mm bore including providing necessary fittings complete all as specified and directed.

S&F in replacement of seprator of U type made of porcelain used for earth strip mounting with all nut bolts and connecting accessories complete all as specified and directed.

M&L in replacement of PVC/rubber pipe/sleeve for protection of earth strip and insulation purpose complete all as specified and directed.

S&F in replacement for installation of earth notice plate of size 1.6mm thick mild steel sheet, vitreous enamelled white, with letters, figures i.e. pit number, connected to, tested date, ohmic value as per direction by EIC fixed beside earthing pit with GI stand of approved size complete all as specified and directed.

S&F in replacement of HDPE pipe of size 40 mm bore of pressure rating 6 kgf/cm2 laid in trenches/ fixed on wall or roof for protection of earthing strip complete all as specified and directed.

M&L for brazing of earthing strip of any size using identical material brazing rods with the help pf burner welding machine as required at site all as specified and directed by EIC.

S&F voltage stabiliser of capacity 3 KVA for automatic operation, single phase naturally air cooled indoor type & designed for input variation between 170V to 250 V with output voltage stabilized at 230 Volt complete all as specified and directed.

Supply and draw submain wiring with 2 runs of single core 4 sqmm FRLS PVC insulated copper cable 1100 volts grade multistrand,unseathed conductor drawn through and including PVC conduit and all necessary fittings including 1 run of 4 sqmm multistrand FRLS PVC insulated copper wire for earth continuity conductor connected to common earth dolly complete all as specified and directed. (Note:- 2 runs of main cable, one run of earth wire and one run of PVC conduit will be measured and paid as one length of unit.)

S&F MCBs of 'C' series having breaking capacity 10KA ISI marked including required wiring connection with copper lugs of suitable size provided in MCB DBs of single pole 6 to 32 Amp complete all as specified and as direted.

S&F MCBs of 'C' series having breaking capacity 10KA ISI marked including required wiring connection with copper lugs of suitable size provided in MCB DBs of SPN 40 to 63 Amp complete all as specified and as direted.

Supply and fixing MCB DB made of powder coated CRCA steel sheet, degree of protection IP 43- IK 09 with reversible double door recess mounted, having insulated 200 Amps tinned copper bus bar, neutral bus bar, din bar, detachable gland plate, interconnection earthing connection blanking plates in unused spanes as required with TPN 440 volts 4 ways complete all as specified and as directed.

Supply and fixing MCB DB made of powder coated CRCA steel sheet, degree of protection IP 43- IK 09 with reversible double door recess mounted, having insulated 200 Amps tinned copper bus bar, neutral bus bar, din bar, detachable gland plate, interconnection earthing connection blanking plates in unused spanes as required with SPN 220 volts 8 ways complete all as specified and as directed.

Material & labour for mild steel work in canopy with frame for mounting the condensing unit of AC fabricated from angles, flats, nuts and bolts MS sheets, welded mesh etc all as specified including painting with two coats of synthetic enamel paint over one coat of red oxide primer complete all as specified & directed by the Engineer-in-charge.

Supply and fix sheet metal enclosure SPN with a two pin and earth plug socket complete including with 20Amps MCB'C' single pole 240Volt AC complete all as specified and directed.

Nvimal Engineers and Contractor (BID ID -3505722)

M/s R K Enterprises (BID ID -3507077)