REPAIR/REPLACEMENT OF INTERNAL FLAME PROOF WIRING, FLAMEPROOF LIGHT, EXHAUST FANS, MCBs,DBs AND SUBMAIN WIRING INCLUDING REPAIR/REPLACEMENT OF EXISTING LA, EARTHING PITS WITH MAINTENANCE FREE CHEMICAL EARTHING PITS AND OTHER E/M WORK AT AF STN TEZPUR

Amount

Materials and Labour for point wiring with 1.50 Sq. mm (nominal area) FRLSH PVC insulated and unsheathed, multi stranded copper conductor cable 1100 Volts grade, single core, laid in and including stove enamelled steel conduit complete with all fittings and accessories,fixed to walls/ceiling, including stove enamelled black steel junction box, with cover and outlets and including 1.50 Sq. mm (nominal area) FRLSH PVC insulated and unsheathed multi stranded copper conductor cable 1100 Volts grade, single core, earth continuity conductor connected to common earth dolly for,one 3 Pin 5 Amps socket outlet independent ,including taking down carefully existing copper/ aluminium point wiring (light, fan, socket or power) complete including fittings such as switches, ceiling roses, pendent, regulators, sockets, light fittings etc, removing materials from site and making good disturbed surfaces of walls, floors etc,complete all as specified and directed.

Materials and Labour for point wiring with 4.00 Sq. mm (nominal area) FRLSH PVC insulated and unsheathed, multi stranded copper conductor cable 1100 Volts grade, single core, laid in and including stove enamelled steel conduit complete with all fittings and accessories,fixed to walls/ceiling, including stove enamelled black steel junction box, with cover and outlets and including 4.00 Sq. mm (nominal area) FRLHS PVC insulated and unsheathed multi stranded copper conductor cable 1100 Volts grade, single core, earth continuity conductor connected to common earth dolly for,one 3 Pin 15/16 Amps socket outlet independent,including taking down carefully existing copper/ aluminium point wiring (light, fan, socket or power) complete including fittings such as switches, ceiling roses, pendent, regulators, sockets, light fittings etc, removing materials from site and making good disturbed surfaces of walls, floors etc,complete all as specified and directed.

Supply and Fix,switch flame proof rotary type with termination box in LM6,16A,single pole 250V,complete all as specified and directed.

Supply and Fix,flame proof switch socket & plug combined in LM6 cable termination box in LM6, 16A,250V, 2P+earth ,complete all as specified and directed.

Supply and Fix, 80 mm dia.,cast aluminium body LM6, flame proof,weather proof junction box 4 way terminal with 4 number of 3/4 ET cable entry, protection type Ex-D,Zone 1 & Zone 2,IP-55,Gas Group IIB,Temp Class T6,complete all as specified and directed. [Cat No SAI/JB/1002 of Sudhir Electricals or equivalent Model of Make Balinga/Shyam]

Supply and Fix in repair, knob as per OEM's specification for switch flame proof rotary type,16A,single pole 250V,complete all as specified and directed.

Supply and Fixing LED light fitting 1x16 Watt flame proof, CMRI certified recommended for gas/ vapor group of IIA & IIIB, Zone 1 & 2 and IP 65 protection with die cast aluminum housing with heat resistant toughened glass with LED tube light fixtures driver,holders, connector etc. complete with all accessories prewired and including connecting up with three core flexible copper conductor cable with suitable size.,complete all as specified and directed.

Supply and Fixing in repair, LED light fitting 1x16 Watt flame proof, CMRI certified recommended for gas/ vapor group of IIA & IIIB, Zone 1 & 2 and IP 65 protection with die cast aluminum housing with heat resistant toughened glass with LED tube light fixtures driver,holders, connector etc. complete with all accessories prewired and including connecting up with three core flexible copper conductor cable with suitable size,complete all as specified and directed.

Supply and Fixing, LED light fitting 2x16 Watt flame proof, CMRI certified recommended for gas/ vapor group of IIA & IIIB, Zone 1 & 2 and IP 65 protection with die cast aluminum housing with heat resistant toughened glass with LED tube light fixtures driver,holders, connector etc. complete with all accessories prewired and including connecting up with three core flexible copper conductor cable with suitable size,complete all as specified and directed.

Supply and Fixing in repair, LED light fitting 2x16 Watt flame proof, CMRI certified recommended for gas/ vapor group of IIA & IIIB, Zone 1 & 2 and IP 65 protection with die cast aluminum housing with heat resistant toughened glass with LED tube light fixtures driver,holders, connector etc. complete with all accessories prewired and including connecting up with three core flexible copper conductor cable with suitable size,complete all as specified and directed.

Supply and Fixing, Flameproof cum Waterproof LED Bulk Head light fitting of 30W, IP66 protection of Cast Aluminum alloy material and Heat and Impact resistance toughen 'A' clear glass having Anti corrosive epoxy powder coated finish complete with all accessories pre wired and including connecting up with three core flexible copper conductor cable with suitable size,complete all as specified and directed.

Supply and Fixing in repair, Flameproof cum Waterproof LED Bulk Head light fitting of 30W, IP66 protection of Cast Aluminum alloy material and Heat and Impact resistance toughen 'A' clear glass having Anti corrosive epoxy powder coated finish complete with all accessories pre wired and including connecting up with three core flexible copper conductor cable with suitable size,complete all as specified and directed.

Fixing Only flame proof light fittings of any description including connecting up with three core flexible copper conductor cable with suitable size,complete all as specified and directed. Note:- Old Existing Serviceable flameproof light fittings obtained from taking down wirings shall be re-fixed.

Materials and Labour for two single core FRLSH PVC insulated unsheathed cable 4.00 Sq. mm. (Nominal area) with stranded copper conductor cable, 1100 Volts grade, drawn into and including stove enamelled steel conduit and continuous earth wire of single core FRLSH PVC insulated, unsheathed cable 4.00 Sq. mm (nominal area) with stranded copper conductor cable, 1100 Volts grade for circuit/sub main wiring,including taking down carefully existing copper/ aluminium circuit/submain wirings of any size (2 runs single core and earth continuity) complete including PVC casing capping/ PVC conduit/Steel Conduit with fittings etc, removing materials from site and making good disturbed surfaces of walls, floors etc.,complete all as specified and directed.

Materials and Labour for two single core FRLSH PVC insulated unsheathed cable 6.00 Sq. mm. (Nominal area) with stranded copper conductor cable, 1100 Volts grade, drawn into and including stove enamelled steel conduit and continuous earth wire of single core FRLSH PVC insulated, unsheathed cable 6.00 Sq. mm (nominal area) with stranded copper conductor cable, 1100 Volts grade for circuit/sub main wiring,including taking down carefully existing copper/ aluminium circuit/submain wirings of any size (2 runs single core and earth continuity) complete including PVC casing capping/ PVC conduit/Steel Conduit with fittings etc, removing materials from site and making good disturbed surfaces of walls, floors etc.,complete all as specified and directed.

Materials and Labour for two single core FRLSH PVC insulated unsheathed cable 4.00 Sq. mm. (Nominal area) with stranded copper conductor cable, 1100 Volts grade, drawn in and including PVC casing and caping and continuous earth wire of single core FRLSH PVC insulated, unsheathed cable 4.00 Sq. mm (nominal area) with stranded copper conductor cable, 1100 Volts grade for circuit/sub main wiring,including taking down carefully existing copper/ aluminium circuit/submain wirings of any size (2 runs single core and earth continuity) complete including PVC casing capping/ PVC conduit/Steel Conduit with fittings etc, removing materials from site and making good disturbed surfaces of walls, floors etc.,complete all as specified and directed.

Materials and Labour for two single core FRLSH PVC insulated unsheathed cable 6.00 Sq. mm. (Nominal area) with stranded copper conductor cable, 1100 Volts grade, drawn in and including PVC casing and caping and continuous earth wire of single core FRLSH PVC insulated, unsheathed cable 6.00 Sq. mm (nominal area) with stranded copper conductor cable, 1100 Volts grade for circuit/sub main wiring,including taking down carefully existing copper/ aluminium circuit/submain wirings of any size (2 runs single core and earth continuity) complete including PVC casing capping/ PVC conduit/Steel Conduit with fittings etc, removing materials from site and making good disturbed surfaces of walls, floors etc.,complete all as specified and directed.

Materials and Labour for two single core FRLSH PVC insulated unsheathed cable 10.00 Sq. mm. (Nominal area) with stranded copper conductor cable, 1100 Volts grade, drawn in and including PVC casing and caping and continuous earth wire of single core FRLSH PVC insulated, unsheathed cable 10.00 Sq. mm (nominal area) with stranded copper conductor cable,1100 Volts grade for circuit/sub main wiring,including taking down carefully existing copper/ aluminium circuit/submain wirings of any size (2 runs single core and earth continuity) complete including PVC casing capping/ PVC conduit/Steel Conduit with fittings etc, removing materials from site and making good disturbed surfaces of walls, floors etc.,complete all as specified and directed.

Materials and Labour for two single core FRLSH PVC insulated unsheathed cable 4.00 Sq. mm. (Nominal area) with stranded copper conductor cable, 1100 Volts grade, drawn into existing surface/recessed PVC conduit/stove enamelled steel conduit and continuous earth wire of single core FRLSH PVC insulated, unsheathed cable 4.00 Sq. mm (nominal area) with stranded copper conductor cable, 1100 Volts grade for circuit/sub main wiring,including taking down carefully existing copper/ aluminium circuit/submain wirings of any size (2 runs single core and earth continuity),complete all as specified and directed.

Materials and Labour for two single core FRLSH PVC insulated unsheathed cable 6.00 Sq. mm. (Nominal area) with stranded copper conductor cable, 1100 Volts grade, drawn into existing surface/recessed PVC conduit/stove enamelled steel conduit and continuous earth wire of single core FRLSH PVC insulated, unsheathed cable 6.00 Sq. mm (nominal area) with stranded copper conductor cable, 1100 Volts grade for circuit/sub main wiring,including taking down carefully existing copper/ aluminium circuit/submain wirings of any size (2 runs single core and earth continuity),complete all as specified and directed.

Dressing/aligning of existing circuit/sub main wiring by taking down carefully existing copper/ aluminium circuit/submain wirings of any size (2 runs single core and earth continuity) complete including steel conduit with fittings etc.,making good disturbed surfaces of walls, floors etc.and refixing the same in original position,complete all as specified and directed. Note:- Damaged steel conduit for replacement if any will be measured and paid seperately under respective item of this BOQ.

Supply Only, rigid, non-metallic PVC casing-capping of size 25 x 16 mm (externally), ISI Marked [IS: 14927 (Part-I&II)-2001] including all accessories such as Tees, bends, elbows, reducers, couplers but exclusive of boxes (junction/terminal) all as specified.

Supply Only,20 mm external diameter,stove enamelled black,rigid steel conduit,welded,all as specified.

Supply and Fix, flame proof, weather proof enclosure for MCB Distribution Board, Single Phase and Neutral, with incoming & outgoing terminals chamber, bus bar chamber comprising of 02(Two) Nos. copper bus bars of suitable rating,separate MCB chambers suitable for accommodating 03 (Three) Nos. of 6-32 Amp. DP MCB 'C' curve,enclosure made of cast aluminium alloy LM6, weather proof IP65, finished inside and outside with light grey epoxy powder coating, including cable glands, terminals, hardware and mounting arrangement all as per Cat No. MCBDB/186 of Make “Sudhir” or equivalent Model of Make Balinga/Shyam,complete all as specified and directed.

Supply and Fix,single pole and neutral enclosure with a two pin and earth plug and socket complete with one single pole MCB, 20 Amps, 240V, complete all as specified and directed. [Cat No. 5078 11 of Make Legrand or equivalent Model of Make L&T/ Hager/Seimens/GE/Schneider/ABB]

Supply and Fix, Double Door, Sheet Metal Enclosure for DBs for mounting of MCB for 240 Volts, 4 way, with 200 Amps rated bus bar, Single Pole & Neutral,complete all as specified and directed. [Cat No. 5076 10 of Make Legrand or equivalent Model of Make L&T/Hager/ Seimens/GE/Schneider/ABB]

Supply and Fix, Double Door, Sheet Metal Enclosure for DBs for mounting of MCB for 240 Volts, 8 way, with 200 Amps rated bus bar, Single Pole & Neutral,complete all as specified and directed. [Cat No. 5076 11 of Make Legrand or equivalent Model of Make L&T/Hager/ Seimens/GE/Schneider/ABB]

Supply and Fix, Double Door, Sheet Metal Enclosure for DBs,415 Volts, 4 Way,Triple Pole & Neutral,complete all as specified and directed. [Cat No. 5076 70 of Make Legrand or equivalent Model of Make L&T/Hager/ Seimens/GE/Schneider/ABB]

Supply and fix miniature circuit breaker (MCBs) single pole, 240 Volts, 10KA,'C' curve, 6 to 32 Amps complete all as specified and directed. [Cat No. 4085 87-4085 95 of Make Legrand or equivalent Model of Make L&T/Hager/Seimens/GE/Schneider/ABB]

Supply and fix in repair miniature circuit breaker (MCBs) single pole, 240 Volts, 10KA,'C' curve, 6 to 32 Amps complete all as specified and directed. [Cat No. 4085 87-4085 95 of Make Legrand or equivalent Model of Make L&T/Hager/Seimens/GE/Schneider/ABB]

Supply and fix miniature circuit breaker (MCBs) single pole and neutral, 240 Volts, 10KA,'C' curve, 6 to 32 Amps complete all as specified and directed. [Cat No. 4086 09-4086 17 of Make Legrand or equivalent Model of Make L&T/ Hager/ Seimens/GE/ Schneider/ABB]

Supply and fix in repair miniature circuit breaker (MCBs) single pole and neutral, 240 Volts, 10KA,'C' curve, 6 to 32 Amps complete all as specified and directed. [Cat No. 4086 09-4086 17 of Make Legrand or equivalent Model of Make L&T/ Hager/Seimens/GE/Schneider/ABB]

Supply and fix miniature circuit breaker (MCBs) single pole and neutral, 240 Volts, 10KA,'C' curve, 40 Amps complete all as specified and directed. [Cat No. 4086 18 of Make Legrand or equivalent Model of Make L&T/ Hager/Seimens/GE/Schneider/ABB]

Supply and fix in repair miniature circuit breaker (MCBs) single pole and neutral, 240 Volts, 10KA,'C' curve,40 Amps complete all as specified and directed. [Cat No. 4086 18 of Make Legrand or equivalent Model of Make L&T/ Hager/Seimens/GE/Schneider/ABB]

Supply and Fix, miniature circuit breaker (MCBs) triple pole, & neutral, 415 Volts, 10KA,'C' curve, 63 Amps complete all as specified and directed. [Cat No. 4086 83 of Make Legrand or equivalent Model of Make L&T/ Seimens]

Supply and Fix in repair, miniature circuit breaker (MCBs) triple pole, & neutral, 415 Volts, 10KA,'C' curve, 63 Amps complete all as specified and directed. [Cat No. 4086 83 of Make Legrand or equivalent Model of Make L&T/ Seimens]

Supply and Fix, PVC blanking plate,single way for blank ways of MCB DBs,complete all as specified and directed.

Taking down carefully existing flame proof tube light fittings 1x36/40W,replacement of the lamp with 1 x 20 Watts LED glass T8 tube with in built driver and metal heat sinks,lumen efficacy 100 Lumens/Watt,refixing of light fittings in original position including connecting up with three core flexible copper conductor cable with suitable size,complete all as specified and directed. [Cat No.LT8-20-865-(2) of Make 'Crompton Greaves' or equivalent Model of Make 'Philips'/ 'Wipro'/'GE']

Taking down carefully existing flame proof tube light fittings 2x36/40W,replacement of the lamp with 2 x 20 Watts LED glass T8 tube with in built driver and metal heat sinks,lumen efficacy 100 Lumens/Watt,refixing of light fittings in original position including connecting up with three core flexible copper conductor cable with suitable size,complete all as specified and directed. [Cat No.LT8-20-865-2 'CRYSTA' of Make 'Crompton Greaves' or equivalent Model of Make 'Philips'/ 'Wipro'/'GE']

Taking down carefully existing flame proof bulk head fittings 1x60/100W,replacement of the lamp with 1 x 30 Watts retrofit LED Lamp (Spiral B-22 base),lumen efficacy 100 Lumens/Watt, refixing of light fittings in original position including connecting up with three core flexible copper conductor cable with suitable size,complete all as specified and directed. [Cat No. LED30DFCDL of Make 'Crompton' or equivalent Model of Make 'Philips'/ 'Wipro'/'GE']

Taking down carefully existing flame proof ceiling fan 1200 mm sweep, dismantaling of parts, removing burnt out windings with insulating materials,cleaning throughly internally and externally, rewinding fan motor with super enamelled copper wires of existing size including provision of all insulating materials and varnishing, lubrication of bearing / bushes using fresh lubricant all as per OEMs reccommendations, replacement of defective parts,re-assembling, hanging in original position including testing and commissioning, complete all as specified and directed. NOTES:- (i) Repairs and rewinding woks shall be carried out through authorised technicians of the OEMs as approved by GE. (ii) Spares for replacement shall be as per OEM's specifications.

Taking down carefully existing flame proof exhaust fan 300 mm/450 mm size, dismantaling of parts, removing burnt out windings with insulating materials,cleaning throughly internally and externally, rewinding fan motor with super enamelled copper wires of existing size including provision of all insulating materials and varnishing, lubrication of bearing / bushes using fresh lubricant all as per OEMs reccommendations, replacement of defective parts,re-assembling, fixing in original position including testing and commissioning,complete all as specified and directed. NOTES:- (i) Repairs and rewinding woks shall be carried out through authorised technicians of the OEMs as approved by GE. (ii) Spares for replacement shall be as per OEM's specifications.

Taking down carefully existing damaged/unserviceable Copper/GI strip and GI wire as in earth continuity conductor or main earthing leadfixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other situation of any size and type, complete all as directed.

Taking down carefully existing unserviceable test point terminal block of any size and type complete all as specified and as directed.

Excavating in trenches, n exc 1.5 m wide and n exc 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out in soft/loose soil ,complete all as specified and directed.

Returning filling in soft/loose soil, including, spreading levelling watering and well ramming in layers not exc. 25 cm complete all as specified and directed.

Removing excavated soils to a distance not exceeding 50 Metres and depositing where directed at a level n. exc. 1.5 M above the starting point complete all asspecified and directed.

Supply and Fix in repair,Air Termination, single pointed copper rod 12 mm dia. and 300 mm long, complete all as specified and directed.

Materials and Labour for, test point terminal block 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.

Supply and Fix in repairs, brass screw bolts (machine made),diameter of shank 8 mm, length of bolt 25 mm long,with hexagonal heads at one end and screwed the other,each screwed end to be fitted with washers and one hexagonal or square nut,complete all as specified and directed.

Alignment of existing Copper/GI strips of any size as in roof conductors and down conductors above ground by replacement of damaged saddles with new saddles and fixing screws etc. including making good disturbed surfaces of floors/walls/ceiling etc complete all as specified directed.

Materials and Labour for, brazing of mechanical joints in earth continuity conductor or main earthing lead from one end to other end, complete all as specified and directed.

Materials and Labour for,earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required,copper strip 20 x 3.15mm, complete all as specified and directed.

Materials and Labour for,earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required,copper strip 32 x 6mm,complete all as specified and directed. .

Materials and Labour for,earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required,galvanised iron strip 32 x 6mm, complete all as specified and directed.

Materials and Labour for,earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 4 mm dia galvanised iron or steel wire, complete all as specified and directed.

Materials and Labour for,galvanized steel tubing,40 mm bore,medium grade, in trenches or fixed to poles/Walls etc, for cable protection including taking up or down existing steel tubing, complete all as specified and directed.

Supply Only Sodium Chloride (common salt commercial) for artifical chemical treatment of soil for reduction of earth electrode resistance, complete all as specified. Notes:- (i) Material shall be supplied in standard packaging as per manufacturer's standards (ii) Material shall be delivered in the store yard of AGE E/M GE (AF) Tezpur and receipt voucher obtained.

Supply Only charcoal dust/breeze for artifical chemical treatment of soil for reduction of earth electrode resistance, complete all as specified. Notes:- (i) Material shall be supplied in standard packaging as per manufacturer's standards (ii) Material shall be delivered in the store yard of AGE E/M GE (AF) Tezpur and receipt voucher obtained.

Materials and Labour for provision of plain cement concrete earthing pit as shown on electrical plate No 3 of SSR Part –I (2009), in PCC (1:3:6) Type C1 with and including pre-cast RCC (1:2:4) type B1 cover slab 54 cm x 54 cm x 5 cm reinforced with 8 mm dia. TMT bars @ 150 mm centre to centre both ways, with one handle for lifting made out of 8 mm dia. MS bar, including demolition of existing damaged earthing pit with cover slab and including necessary earthwork in any type of soil,complete all as specified and directed.

Materials and Labour for earthing complete with galvanised steel earth plate electrode 600 mm x 600 mm x 6 mm thick buried directly in ground vertically to a depth not less than 2.25 meter deep below ground level with top edge earth plate at a depth not less than 1.5M below normal ground level connected to galvanised steel earth lead wire 4 mm dia. by means of bolts, nuts check nuts and washers of galvanised steel and connected to main switch board or main control board as directed and including provision of concrete pit in PCC (1:3:6) type C1, pre-cast RCC (1:2:4) type B1 cover slab 54 cm x 54 cm x 5 cm reinforced with 8 mm dia. TMT bars @ 150 mm centre to centre both ways, with one handle for lifting made out of 8 mm dia. MS bar, provision of funnel, wire mesh, 20 mm bore galvanized steel tubing (Medium grade) for watering, charcoal or coke and salt in alternate layers, 15 mm bore galvanized steel tubing medium grade for protection of earth lead connection, necessary excavation and earth work in any type of soil complete all as specified and indicated on electrical plate No 3 of SSR Part –I (2009) including testing on completion.

Materials and Labour for earthing complete with galvanised steel earth plate electrode 600 mm x 600 mm x 6 mm thick buried directly in ground vertically to a depth not less than 2.25 meter deep below ground level with top edge earth plate at a depth not less than 1.5M below normal ground level connected to galvanised steel earth lead strip 32 mm x 6 mm by means of bolts, nuts check nuts and washers of galvanised steel and connected to main switch board or main control board as directed and including provision of concrete pit in PCC (1:3:6) type C1, pre-cast RCC (1:2:4) type B1 cover slab 54 cm x 54 cm x 5 cm reinforced with 8 mm dia. TMT bars @ 150 mm centre to centre both ways, with one handle for lifting made out of 8 mm dia. MS bar, provision of funnel, wire mesh, 20 mm bore galvanized steel tubing (Medium grade) for watering, charcoal or coke and salt in alternate layers, 40 mm bore galvanized steel tubing medium grade for protection of earth lead connection, necessary excavation and earth work in any type of soil complete all as specified and indicated on electrical plate No 3 of SSR Part –I (2009) including testing on completion.

Materials and Labour for maintenance free chemical earthing system using single spike 17.2mm dia, 3000mm long high tensile low carbon steel circular rod, molecularly bonded with copper on outer surface (minimum copper bonding thickness of 250 microns) meeting the requirements of Under Writers laboratories (UL) 467-2007 or latest with 250mm long copper strips of size 50X3 mm, exothermally welded on top of electrode complete including augering (boring) 100-125mm dia hole as required for electrode in any type of soil and back filling with earth enhancing back fill compound as per IEEE 80 2000 Clause 14.5(c), conforming to IEC 62561-7, minimum quantity of compound used,40 Kg per electrode, conforming to IEEE/BS standrads including pit cover light weight made out of high quality polymer with lid made of HDG steel, including nessary testings and commissioning, complete all as specified and as directed. Notes:- (i) The work of earthing shall be carried out by authorised trained rep of OEM. (ii) The acceptable earth resistance at earth busbar/ test point shall be as per users requirement as desired by Engr-in-Charge but it should be below 01 Ohm. At certain locations, it may not be possible to achieve desired earth resistance with one electrode / pit due to higher soil resistivity,in such cases, provision of loop earthing consisting of more than one earth electrode pits shall be done. The number of pits required shall be decided based on the resistivity of soil and resistance achieved for the earth pits already installed. The distance between two successive earth electrodes shall not be less than 3 metres. (iii) The procedure mentioned here-in-before for one earth pit shall be repeated for other earth pits. (iv) Additional earth electrode pits and loop conductor shall be measured and paid seperately . (v) The quoted rate shall also be included the following elements: (a) Complete earthwork including drilling holes for electrode.(b) Earhing electrode-01(One) No Only (c) Backfilling carbon based ground enhancing compound (GEC). (d) Pit cover light weight made out of high quality polymer with lid made of HDG steel. (e) Soil suitable for agricultural purpose required for each pit (f) Copper strip as earthing lead of size 50mmx3mm, 250 mm long only, beyond 250mm, other size will be measured and paid for separately under respective item(s) in this BOQ. (g) All Labour and T&P required including testing of earth network. (vi) Testing for earth resistance shall be carried out in presence of GE and Engr-in-Charge. (vii) Taking out existing unserviceable earthing system complete. (viii) Original purchase vouchers for copper rod and back fill compound and manufacturer test certificate of entire quantity shall be produced by the contractor before commencement of work. (ix) The Earthing shall be carried out with Soil suitable for Agricultural purpose.

SHRI D. C. BISWAS

M/S N G CHOWDHURY