CA NO GE/HAL-06/2021-22 Repair Replacement of earthing infrasructure alongwith allied work at AF station Halwara

Amount

M&L for checking of earth values of each earth pit on monthly basis/on periodcity/on demand/on any anomaly observed of any type of earth pit by deploying skilled and trained personnel with calibrated testing equipments and T&P required for the same and recording the actual earthing test results achieved at site, watering with adequate quantity of water to earth pits from nearest available water point to achieve better results complete all as specified and directed Note : Quartely/half yearly/yearly calibration report of the testing equipment shall be submitted by the contractor. Adequate teams shold be provided by contractor to carryout the jobs to complete with in desired perdicity.

Taking down serviceable GI earth strip of any size for replacement of wornout/unserviceable stud insulators and refixing including providing new porcealian/plastic insulators of suitable size with screws/nuts, bolts and washers and welding/brazing of joints/broken points etc complete all as specified.

Taking down serviceable aluminium earth strip of any size for replacement of wornout/unserviceable stud insulators and refixing including providing new porcealian/plastic insulators of suitable size with screws/nuts, bolts and washers and welding/brazing of joints/broken points etc complete all as specified.

Taking down serviceable copper earth strip of any size for replacement of wornout/unserviceable stud insulators and refixing including providing new porcealian/plastic insulators of suitable size with screws/nuts, bolts and washers and welding/brazing of joints/broken points etc complete all as specified

S&F in repair air termination, single pointed copper rod 12mm dia and 300mm long for lighting conductor complete all as directed.

S&F in repair aluminium strip 25x3.15mm with porcealian shaddles and fixing screws for roof conductors and down conductors and welding/brazing of joints above ground complete all as directed.

S&F in repair copper strip 20x3.15mm with porcealian shaddles and fixing screws for roof conductors and down conductors and welding/brazing of joints above ground complete all as directed.

S&F in repair copper strip 32x6mm with porcealian shaddles and fixing screws for roof conductors and down conductors and welding/brazing of joints above ground complete all as directed.

S&F in repair test point terminal block made of gun metal or phosphorus bronze of size 75x75x25mm drilled and screwed including 3 Nos 8mm dia 25mm long hex head screws for lighting conductor complete all as specified.

S&F in repair galvanised iron strip 32x6mm with porcealian shaddles and fixing screws for roof conductors and screwed including 3 Nos, 8mm dia 25mm long hex head scews for lighting conductor complete all as specified.

M&L in repair earthing complete with galavanised steel plate electrode 600x600x6.3mm thick burried directly in ground vertically (earth plate to a depth of not less than2.25 meter deep below ground level) with the top edge of earth plate at a depth of not less than 1.5 meter below normal ground level connected to GI strip 32x6mm by means of bolts, nuts, washers of galvanised iron and provision of earth wire, galvanised iron protection pipe 40mm bore, light grade up to and including test point including necessary earth work in any type of soild and PCC (1:3:6) type C1 (using 20mm graded stone aggregate) earth chamber, watering pipe 20mm dia galvanised iron light grade with funnel, RCC (1:2:4) type B1 precast cover 40mm thick with 6mm dia mild steel bars complete all as shown in electrical plate N.5 of SSR part-I connected to earthing test point all as specified or indicated,including taking down and testing on completion Note:- Quoted rate deemed to include the cost of excavation and earth work, PCC pit, funnel and cover etc,

M&L in repair earthing complete with copper plate electrode 600x600x3.15mm thick burried directly in ground vertically (earth plate to a depth of not less than2.25 meter deep below ground level) with the top edge of earth plate at a depth of not less than 1.5 meter below normal ground level connected to copper strip 20x3mm by means of bolts, nuts, washers of galvanised iron and provision of earth wire, galvanised iron protection pipe 40mm bore, light grade up to and including test point including necessary earth work in any type of soild and PCC (1:3:6) type C1 (using 20mm graded stone aggregate) earth chamber, watering pipe 20mm dia galvanised iron light grade with funnel, RCC (1:2:4) type B1 precast cover 40mm thick with 6mm dia mild steel bars complete all as shown in electrical plate N.5 of SSR part-I connected to earthing test point all as specified or indicated,including taking down and testing on completion Note:- Quoted rate deemed to include the cost of excavation and earth work, PCC pit, funnel and cover etc,

Supply and installation, commissioning and testing in repair of tripode (set of three) copper bonded rod earthing 17mm dia and 3 metre length with copper strip of 20x3mm for interconnection to earth electrodes including brazing and for upto test point. the electrode should be copper coated with 250 micron. the copper bonded rod shall be surrounded with 50 Kg (25 Kgx2 bags) back fill compound to provide maximum contact between the electrode and backfill compound. Backfill compound should be eco freindly and having RDSO certification. Copper bonded rod earthing should be maintenance free.the earthing pit should be covered with FRP pit cover etc complete including taking down and testing on completion all as specified directed Make: JMV/ENNOV infra solution/power trac.

Supply and installation, commissioning and testing in repair of each (set of four) copper bonded rod earthing 17mm dia three metre length with copper strip of 20x3mm for interconnection to earth electrodes, including brazing etc and for upto test point .The electrode should be copper coated with 250 micron, the copper bonded rod shall be surrounded with 75Kg (25Kgx3 bags) back fill compound to provide maximum contact between the electrode & back fill compound. Back fill compound should be eco freindly and having RDSO certification. copper bonded earthing should be mainteance free. the earthing pit should be covered with FRP pit cover etc complete including taking down and testing on completion all as specified and directed Make : JMV/ENNOV infra solution/power trac.

Supply and installation, commissioning and testing in repair of each (set of five) copper bonded rod earthing 17mm dia three metre length with copper strip of 20x3mm for interconnection to earth electrodes, including brazing etc and for upto test point .The electrode should be copper coated with 250 micron, the copper bonded rod shall be surrounded with 100Kg (25Kgx4bags) back fill compound to provide maximum contact between the electrode. Back fill compound fill should be be eco freindly and having RDSO certification. copper bonded rod earthing should be mainteance free. the earthing pit should be covered with FRP pit cover etc complete including taking down and testing on completion all as specified and directed Make : JMV/ENNOV infra solution/power trac.

M& for surface dressing not exc 15cm deep of earth pit surrounding area upto 1.5 Mtr away on all sides and complete earth pit, funnel etc of earth pit chamber including by cutting and cleaning away grass, bushes, small plant, vegetable shrubs, bushes of under roots etc and depositing waste to nearby garbage bin complete all as specified and directed.

Dismantling the existing unserviceable earth pit and M&L for constructing earth pit chamber with 120mm thick walls in PCC 1:3:6 type C1 of size 300x300mm (internal size)x250mm deep with 150mm thick foundation of size 690x690mm using PCC 1:4:8 type D2, 15mm thick internal plaster, RCC (1:2:4) type B1 precast cover of size 540x540x40mm thick with 6mm dia 150mm C/C mild steel bars with lifting handles 02 Nos with 8mm dia MS bar complete including marking of earth pit details all as specified and directed.

M&L for repair and renewal of earthing complete including excavation, earth work, taking down of existing earthing plate and earth lead connection. Cleaning the earth plate, provision of earth lead connection with and including GI nuts bolts and washers, Layers of charcoal and salt as per plate No 5 of SSR part I, and precast PCC (1:3:6) type C1 (using 20mm graded stone aggregate) earth chamber and RCC (1:2:4) type B1 precast cover 40mm thick with 6mm dia mild steel bars all as specified and as directed by Engr -in-Charge and testing on completion and result of earthing should be submitted ro Engr-in-Charge in prescribed format. Note : Watering pipe , protection pipe and funnel shall be measured and paid separately

M&L for protection of earthing lead with galvanised steel tubing 40 mm bore light grade with all fittings in earthing including taking down of unsv pipes and removing to store for afer custody or for issue under Sch of credit

M&L for watering pipe for eathing as per plate No 5 of SSR part I with galvanised steel tubing 20 mm bore light grade with all fitting including taking down of old steel tubing and removing to store for safe custody or for issue under sch of credit

S&F funnel made out of GI/mild steel sheet 3 mm thick in conical shape, dia of the funnel at bottom is 15 mm and at top is 75 mm, placed on GI pipe for watering the earth including taking out existing funnel and removing to store for safe custody or for issue under sch of credit

R N Enterprises

swarn singh and co.