8123/SAR-08/2023-24 SPL REP FOR REPLACMENT OLD DETERIORATED EARTHING SYSTEM AT CERTAIN LOCATIONS, CONVERSION OF 1-PHASE ELECTRIC SUPPLY TO 3-PHASE SUPPLY IN OMQS AND REPLACEMENT OF DBS IN SMQ AREA AFS SARSAWA UNDER GE AF SARSAWA

Amount

Section-1 Taking down DB including old U/s MCB/MCCB/Isolator box of any size any type from any location complete all as specifed and directed.

Taking down old US single phase submain wiring including old conduits clamps etc of any size from any location complete all as specifed and directed.

S & F in replacement of sub main wiring with PVC insulated, FRLS, unsheathed four single core cable 1100 volts grade with stranded copper conductor of size 6.0 sqmm (Nominal area) drawn in and including concealed PVC conduit of size not less than 25 mm dia as directed with and including one run of 6.0 sqmm multi stranded copper conductor single core PVC insulated, unsheathed cable of green colour as continuous earth wire including lugs etc connected and tested complete all as specified and as directed. Note: (i) Four runs of 6.0 sqmm cable and one run of 6.0 sqmm cable of earth continuity conductor and PVC conduit shall be a unit length.

S & F in replacement of sub main wiring with PVC insulated, fire retardant (FRLS), unsheathed two single core cable 1100 volts grade with stranded copper conductor of size 6.0 sqmm (Nominal area) drawn in and including concealed PVC conduit of any size and type with and including one run of 6.0 sqmm multi stranded copper conductor single core PVC insulated, unsheathed cable of green colour as continuous earth wire including lugs etc connected and tested complete all as specified and as directed. Note:(i) Two runs of 6.0 sqmm cable and one run of 6.0 sqmm cable of earth continuity conductor shall be a unit length.

S & F in replacement of sub main wiring with PVC insulated, FRLS unsheathed two single core cable 1100 volts grade with stranded copper conductor of size 4.0 sqmm (Nominal area) drawn in and including PVC conduit of suitable size as directed with and including one run of 4.0 sqmm multi stranded copper conductor single core PVC insulated, unsheathed cable of green colour as continuous earth wire including lugs etc connected and tested complete all as specified and as directed. Note:(i) Two runs of 4.0 sqmm cable and one run of 4.0 sqmm cable of earth continuity conductor and conduit shall be a unit length.

S & F Regid non-metallic PVC conduit 25 mm (external dia) ISI marked (on surface) incl of all accessories and all fittings such as Tees bends, elbows, reducers, bell mouth, tube ends and fixing accossories such as couplers lock nuts, saddles, pipe hook etc complete all as specified and as directed.

S&F in replacement of Double door prewired distribution board 4 way TPN when MCB to be used as incomer powder coated with Bus Bar 200 Amps, 415 V, Earth Stud, Din Rail, with IP 43 protection complete all as specified and directed (Note- (a) MCBs are to be measured and paid seperately. (b)Make of MCBs and DB should be same. (c) Extra circuit length where DBs are to be shifted from existing location to new location shall deemed to be included in the quoted rate. Make- Legrand/L&T/Schneider

S&F in replacement of sheet metal enclosure double door concealed suitable for SPN distribution boards when MCB to be used having 200 Amp rated bus bar 8 ways 240 V including fixing in new location with connection of circuit and submain as per site requirement with IP 43 protection complete all as specified and as directed . Note- (a) MCBs are to be measured and paid seperately. (b)Make of MCBs and DB should be same.(c) Extra circuit length where DBs are to be shifted from existing location to new location shall deemed to be included in the quoted rate. Make- Legrand/L&T/Schneider

S&F in replacement MCB TPN 40 Amps, 240 volts, curve 'B', breaking capacity 10 KA, all as specified.

S&F in replacement MCB TPN 63 Amps, 240 volts, curve 'B', breaking capacity 10 KA, all as specified.

S&F in replacement MCB SP 5 to 32 Amps, 240 volts curve 'B',breaking capacity 10KA, all as specified.

S&F in replacement MCB SPN 16 to 40 Amps, 240 volts, curve 'B', breaking capacity 10 KA, all as specified.

Supply and fixing in repair of Earthing to DBs with Galvanised steel pipe electrode shall be of medium grade 40 mm dia and 2.5 m in length. Pipe electrode shall be cut tapered at the bottom and is provided with 12 mm dia holes (staggered) at 75 mm centre to centre upto 2 m of length from bottom. The electrode shall be buried directly in ground vertically with its top edge not less than 1.25 m below ground level connected to main earth lead 4.0 sqmm galvanised iron wire by means of bolts, nut, check nuts and washers of galvanized iron or steel all as shown in electrical plate No.2 of MES Schedule pt-I 2009, GI earth lead shall be protected by GI pipe 15 mm dia medium grade and connected to distribution board including excavation in any type of soil,returning filling, disposal of soil, providing alternate layer of charcoal dust and common salt upto top edge of electrode, construction of PCC pit with RCC cover, funnel, including testing on completion complete all as specified and as directed. Note- cost of Making good of disturbed surface/area to match with existing surface is deemed to be included in the quoted rate.

M & L for Earth continuity conductor or main earthing lead of 4.0 Sqmm galvanized iron wire, buried in ground or fixed to wall in and including 15 mm bore GI pipe medium grade for protection of earth wire complete all as specified and directed. Note- cost of Making good of disturbed surface/area to match with existing surface is deemed to be included in the quoted rate.

Dismantling/Taking out old unserviceable earthing any type/size complete all as specified and directed.

Supply, laying and testing cable XLPE Insulated ,screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 35 sq mm 3.5 core all as specified and directed.

Boring of holes under road, pavement, hard standing by trenchless technology and necessary tool including HDPE pipe of 40 mm dia suitable for 0.4 mpa working pressure complete all as specified and directed.

Demolition of stone slabs and tiles of any description or thickness in floors, aprons etc., laid, bedded and pointed in any mortar Complete all as specified and directed.

Demolition of un-reinforced cement concrete in ground floors and pavings not exceeding 15 cm thickness Complete all as specified and directed.

M& L for Cement concrete 1:4:8 type D-2 using 40mm graded stone aggregate in foundations, filling and mass concrete including sub base of floors complete.

M&L for coloured Chequered cement concrete tiles 300X300X25mm thick, set, jointed and pointed in neat cement slurry in floors with grey cement and pigments complete all as specified and as directed by Engr-in-Charge

M&L for 20mm thick screed bed or bedding layer of mortar CM 1:6 for laying floor finishes complete all as specified and as directed by the Engr-in-charge.

Excavation in trenches in soft/loose soil not exceeding 1.5 meter wide & not exc 1.5 mtr deep and getting out for taking out/laying cable, poles & stay etc complete all as specified and directed by engr-in-charge.

M & L for dry sand cushioning to underground cables with 8cm thick before laying of cables and 15cm thick after laying ( total 23 cm ) and compaction till 18 cm thick for measurement purpose complete all as specified and directed .

M & L for common burnt clay bricks, sub class 'B' grade laid in trenches for protection of UG cables perpendicular to the direction of the cables complete all as specified and as directed by Engr-in-Charge

Returning, filling in including spresding leveling watering and well ramming in layers not exceeding 25cm thick after the cable have been laid and tested complete all as specified and directed by Engr-in-Charge..

Removal of excavated surplus soil to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and directed by Engr-in-Charge.

M&L for GI pipes 50 mm dia light grade for cable protection in trenches / poles/Wall complete all as specified and as directed.

Section-2 Taking out old unserviceable strip/wire any type from wall/roof complete all as specified and directed

Supply and fix aluminium strip of size 25x3.15 mm for Earth continuity conductor or main earthing lead fixed to wall/ roof with saddles and fixing screws etc. for roof conductors and down conductors above ground or any other indicated situation complete all as specified and directed. Note:- Two lengths of strips shall be jointed together by overlapping not less than 100 mm both ends through welding/brazing.

Supply and fix copper strip of size 20x3.15 mm for Earth continuity conductor or main earthing lead fixed wall/ roof with saddles and fixing screws etc. for roof conductors and down conductors above ground or any other indicated situation complete all as specified and directed.

Supply and fix GI strip of size 32x6 mm for Earth continuity conductor or main earthing lead fixed wall with saddles and fixing screws etc. or laid underground as in grid connection of earthing complete all as specified and directed.

Taking down old unserviceable single pointed termination rod any type over the roof from PCC block/GI pipe complete all as specified and directed.

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

Supply & fix single pointed air termination copper rod 12mm dia, 300 mm long complete all as specified and directed

Material and labour for earthing complete with galvanized steel earth plate electrode 600mm X 600mm X 6mm buried directly in ground vertically to a depth not less than 2.25 meter below normal ground level (with top edge of earth plate not less than 1.5 meter below ground level) connected to GI strip 32mm X 6 mm main earthing lead by means of galvanized bolts, nuts and washers all as shown in electrical plate no 3 of MES Schedule Part-I (1991) with connected to earth test point & to main switch board etc with & including adequate quantity of charcoal dust and common salt all around earth plate, PCC (1:3:6) type C-1 (using 20mm graded black trap/granite/Basalt stone aggregate) for earth pit with 40 x 40 x 6mm mild steel angle iron frame for cover, pre cast RCC (1:2:4) type B-1 (using 20mm graded black trap/granite/Basalt stone aggregate) 40mm thick cover reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia round bar handle, GI light grade watering pipe 20 mm dia with funnel and wire mesh, and 40 mm dia GI medium grade earth lead protection pipe, complete all as specified and directed. (NOTE : Earth strip and its protection pipe upto and including 7.5 mtr are included under this item)

Supply, installation, commissioning and testing of ring earthing system. Each set consisting of 3 Nos of 10 feet length, 17.2 mm dia earth electrode made of high tensile low carbon steel circular rods, molecularly bonded cooper on outer surface (minimum copper bonding thickness - 250 microns) with terminals to connect incoming strip with 3 bags (60 Kg each ) of environment friendly Portland cement based backfill compound (Resistivity below 0.15 ohm) for each bore as per manufacturing instructions with ROHs test certificate for each 150 x 25 x 6 mm Copper Bar with 4 hole shall be exothermically welded on top to copper bonded rod to terminal laid in a bore of dia 300 mm which inner dia of size 150 mm fill with backfill material and outer bore fill with 100Kg Bantonite in each bore. 25 x 3 mm copper strip shall be used to interconnect the earths and to make the ring and earth pit cover polypropylene (300 mm x 300 mm) duly enclosed in PCC pit of size 600 x 600 x 100 mm shall be included in the scope of work. Note: (i) Earthing shall be tested after completion of work by contractor in presence of Engr-in-Charge and proper record shall be maintained duly signed by all concerned. On testing if the desired earth resistance of less than 1.0 Ohm is not obtained the earthing will be redone at no extra cost to Govt. (ii) The cooper strip from earthing to and upto Eqpt shall be measured and paid separately under relevant item. However, Copper strip for interconnection of 03 Nos earth rods is included in the above item. (iii) Test point measured and paid separately

M & L for Chemical Earthing complete with copper earth plate electrode 90 cm x 60cmx 5mm thick, buried directly in ground vertically (earth pit not less than 2.25 m deep below ground level) with top edge of the earth plate not less than 1.5m below ground level, connected to copper strip 32 x 6 mm as earthing lead by means bolts and nuts check nuts and washers of copper and connected to test point including insulating sleeve PCC chamber soil including necessary excavation in any type of soil, returning, filling removal of soil, filling with 3 bags (60 Kg each) of environment friendly portland cement based backfill compound (Resistivity below 0.15 ohm) and all connected to Earthing test point complete all as specified and directed and testing on completion. (NOTE : Earth strip and its protection pipe upto and including 7.5 mtr are included under this item)NOTE : For Item No 9 to 11, Cost of making good of disturbed surface/area to match with existing surface is deemed to be included in the quoted rate.

Supply & fixing in replacement 25 mm dia bore tubing, Light grade,galvanised, with all fitting,screwed,and fixed complete to walls/ceilings and laid in floors for earthing strip protection/ fixing of air terminator rod complete all as specified & directed.

S&F in replacement of high quality copper bolts with nuts, washer to replace and repair existing earthing bolts of suitable length all as specified and directed.

S&F in replacement of 50 mm medium grade PVC pipe ISI marked, burried earthing strip into the ground for proper insulation of building and equipment complete all as directed.

M&L for Brazing of size 40mmx25mmx5mm in copper strip of size 25x3mm at the joint of strip through copper rod of proper size and combination of oxygen acetylene gas cylinder.Joint must be able to withstand high tensile strength and properly done without any defect or without any crack all as specified and directed.

M&L for fabrication of earth pit indicator made of MS sheet of 3mm thick (shape as directed ) welded on iron strip of 32mm x 6mm thick x 900mm long (150mm in below GL) dully painted with synthetic enemeled paint over a one coat of redoxide primer complete with writing earthing nomenaclature as specifed by Engineer-in-charge.

M&L for test point terminal block in replacement made of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed including 3 nos. 8mm dia 25mm long hex.head screw complete all as specified and directed by Engineer-in-Charge.

Dismantling of old PCC block for construction of new earth PCC block for air termination rod of size as indicated and directed by Engineer-in-charge in (1:3:6) type C1 all as specified and directed.

G.H. INFRASTRUCTURE PRIVATE LIMITED