REPAIR / MAINT FOR EARTHING INFRASTRUCTURE AND MISC E/M REPAIR/REPLACEMENT OF OLD U/S EARTHING LA SYSTEM, EARTHING STRIP AND EARTH PIT AT 7 BRD, AF UNDER GE (AF) TUGHLAKABAD

Amount

M&L for earthing complete with electrode shall be 2 Nos copper plate of size 90 cm x 60 cm x 5mm inter connected with 50x6 copper strip of length 1.5 mtrs and in centre shall be rod electrode as per UL 467:16mm dia solid rod with 250 microns copper coating of length 3 mtr with suitable connector for lower resistance. Alternate layers of soil & curec+ or equivalent (03 kgs bag x 2), make as per IEEE 80: 2000, Clause 14.5D, maintenance free earthing system to give earthing resistance value of < 1Ω . The soil shall be mixed with backfill CURENITE compound as per (25 kgs X 2 bags). Copper electrode's should be solid rod and surrounded with highly conductive and non corrosive nature (pH value certified) and covered with Poly plastic earth pit cover. Further electrodes of GI pipe at least 30mm dia shall be interconnected in paralled fashion in case low ohmage is not achievable, polyplastic pit cover enclosure shall be provided in and including boundary for poly plastic pit cover of size 1.25x1.25x0.3 mtr of brick work duly plaster and painted as per colour coding. All certificates should be NABL LAB and CPRI certified complete all as specified and directed by Engr-in-Charge.

M&L for dismantling of old existing earthing PCC earthing pit with cover and S&F new polyplastic earth pit cover heavy duty with sign board triangular shape, making connection of earth strip including minor adjustment, construction of rectangular of size 0.75X0.75X0.50 (LXBXH) brick boundary alongwith necessary plastering work with specified colour coding around poly plastic earth pit cover, complete all as specified and directed by Engineer-in-Charge.

M&L for Two coats painting of old existing Earthing pit in existing colour complete all as specified and directed by Engr-in-Charge.

M&L for GI brazing (welding) at site to connect loop GI earthing strip of any size after tighten by nut, bolt, washer, check nuts, complete all as specified and as directed by Engr-in-charge. Note: GI brazing shall be done upto 20 mtr height. Rate of necessary tool/plant and ladder required for working upto 20 mtr height shall be deemed to be included in the rate quoted for above item.

M&L for copper brazing (welding) at site to connect loop copper earthing strip of any size after tightening by nut, bolt, washer, check nuts of brass complete all as specified and as directed by Engr-in-charge. Note: Copper brazing shall be done upto 20 mtr height. Rate of necessary tool/plant and ladder required for working upto 20 mtr height shall be deemed to be included in the rate quoted for above item.

M&L for dismantling the strip from earth pit and testing of earth pit to be done as per fall of potential method mentioned in IS-3043 with digital earth resistance tester to check the healthiness of earthing system in and including replacement earth pit nut bolts with brass nut bolts as per required size and record should be kept on ledger duly signed by user representative, JE concerned and contractor and the same shall be submitted to Engr in charge for counter signature complete all as specified and directed by Engineer-in-Charge. Note: Testing of earth pit shall be done as and when required basis as directed by Engineer-in-Charge from time to time.

Labour for physical inspection for earthing health and to check the healthiness of earthing system whether the resistance under safe limits of resistance IF higher than the permissible then recharging of earthing should be done immediately with carbon based low resistivity compound 0.001 ohm meter recharging of existing earth pit by excavating soil up to electrode depth approx 10 feet by manual drilling (post hole) method and filling with backfill compound maintenance free earthing compound to achieve desired resistance value less than 1 ohms in and including water up to top of the excavated bore, backfilling of earth pit, measuring the value after refilling pit and testing of earthing after recharging, reconnecting grounding electrode conductor and earth grid applying petroleum jelly etc. to bolted joints to minimise corrosion for the pipe earthing or plate earthing then gel should be used to lower down the resistance complete all as specified and as directed by Engr-in-charge.

Notes for sl item No 7: (i) In case of satisfactory results not found or results degraded during one year of recharging of the earthing, the same shall be made good/recharged again in order to have required test results within contract/Defect liability period without any extra cost to the department. (ii) Contractor will mark each earthing with CA No., date of recharging of earthing on MS sheet size 18"x12" x 1/8" with suitable mounting arrangement on wall or on ground duly painting blue over a coat of Red Oxide primer and letter/figures of words written with white colour. Quoted rate will be deemed to have been included the cost of the same. (iii) Necessary compound required for recharging shall be measured and paid separately under item No 8 here-in-after.

Supply only carbon based low resistivity compound 0.001 ohm meter, backfill compound for maintenance free earthing compound to achieve desired resistance value less than 1 ohms complete all as specified and directed by Engr-in-charge. Make of backfill compound: Curenite or equivalent.

S&F in replacement of 50 mm heavy duty HDPE Pipe PN-1.0 along with fittings bends, caps etc fixed to wall, underground, ceiling or in floor for protection of copper strip of size 32 x 6 mm in short pieces on surface or in recess for all interconnecting and connecting saddle, in and including taking out worn out and damaged strip complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement 25x4 mm GI strip in short pieces on surface or in recess for all interconnecting, in and including taking out worn out and damaged strip complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in replacement only single phase rolling shutter gate motor powerful with a maximum gate weight capacity 200-250 kg, power source- 230 V-1 phase electromechanical gear motor rolling shutter for industrial hangers complete with encoder, control Unit 230V, rolling shutter tube 60 mm, dia winding flange 200 mm, power 0-450 W, amperage-2A, frequency 50 Hz, insulation class F, Capacitor - mF, RPM -9, Torque - 142 N-M , Max rising height- 7 meter, short team rotation- -8 Min, T with automatically by button or controller manually & limit switches, environmental temperature -25°C to +50°C, with inbuilt control box and infrared photo cell sensor including remote, highest relative humidity: 95 % (25°C) with 10 minutes continuous operation at most in and including dismantling of unserviceable rolling shutter motor from the shaft of shutter for carrying out necessary cleaning and replacement of unserviceable parts, complete all as specified and directed by Engineer-in-Charge. Make/Model: UNIKO-1 M EVOLUTION/ELCOMA/ELERO

Supply and fixing in replacement only single phase rolling shutter gate motor powerful with a maximum gate weight capacity 500 kg, power source- 220 V-1 phase electromechanical gear motor rolling shutter for industrial hangers up to 500 kg complete with encoder, control Unit 220V, rated power-370 W, rated current-3.5A, lifting force-500 KG, output torque- 345 N-M, output rotate speed 6.2 r/min, max rising height- 7 Metre, short team rotation- -8 Min, own weight dropping torque ≤ 10 KG, standard drum diameter- 5 inch, sprocket specification (GB1243.1-81)- 10A-1*68, sprocket gear ratio - 9 T/47 T with automatically by button or controller manually & limit switches, environmental temperature -25°C to +50°C, Highest relative humidity: 95 %(25°C) with 10 minutes continuous operation at most in and including dismantling of unserviceable rolling shutter motor from the shaft of shutter for carrying out necessary cleaning and replacement of unserviceable parts, complete all as specified and directed by Engineer-in-Charge. Make: Tianxing made in TRC JMJ345/6.2-1P- (500 Kg) /TELCOMA/ELERO

Deepak Electricals

DHARAMRAJ BUILDERS & ENGINEERS

M/s Prakash Enterprises

Bluemax Associate

Haryana EngineerService