REPAIR REPLACEMENT OF EARTHING, LIGHTING PROTECTION IN VARIOUS LOCATION AT JALIPA MIL STN UNDER GE ARMY BARMER

Amount

Disconnecting of any type of earthing pits / earthing strips / earth wire leads of any size, any description and in any postion from test point/other loops carefully and testing the earth resistance of any type of earthing with the help of digital earth tester of make WACO/or equivalent of suitable capacity maintaining record duly signed by users / JE E/M and contractor including carrying out Periodical maintinance of joints of earthing strip, by opening / tightening / replacement of nuts, bolts & washers of GI / brass and reconnecting of earthing strip/wire lead after test on original position complete all as specified and directed. NOTE :- (i). The contractor will arrange digital/Analog Earth Tester, all T&P & accessories for recording the reading.Testing shall be done as per method shown and described in instruction booklet of manufacturer of digital earth resistance tester. (ii). The record of resistance value of each earthing alongwith date of testing shall be maintained.and submit to Engg-in-charge. (iii) The necessary excavation & earth work is required to be included in the rate quoted,

M&L for Reconditioning of high resistance value for coventional GI/copper earthing by watering in the earth pit through watering pipe mixed with common salt (50 kg @ 1 bag) & charcol ( 25 kg @ 2 bag) 0.20 cum around the earth electrode of earthing pit to improve the resistance and filled/dropped in earthing through dewatering pipe as per site condtion,de-watering pipe to be clean by means of appropriate size rod/steel wire and finally testing and recording result as specified in item No 1 above all as directed by Engg-in-charge. Note:- (i) The water for this purpose shall be supplied by the deptt at the nearest available source but contractor shall make his own arrangement for drawing water from approved source. (ii) The necessary excavation & earth work is required to be included in the rate quoted,

M&L in repair of chemical earthing, disconnecting of any type of earthing, excavation the existing earthing surface area to till middle depth of the earthing plate for both side plate & remove the soil / old existing compound and filling the environment friendly earth enhancing BACKFILL compound (conductolite) 25 kg bag including necessary testing & commisioning including making good surface as per existing complete all as specified and directed by Engineer-in-charge for the grid of three earthings for Equipments. Make: ASHLOK / M/S McML Protection Technologies Pvt Ltd. / M/S JMV Earthing Equipment Pvt Ltd / M/S JEF Techno Solutions (P) Ltd. Note :-(i) The carbon based compound shall have a resistance value of less than 01 ohm. The compound shall be filled up to required level ie (3 .0 mtr ) of earth pit. (ii) The necessary excavation & earth work is required to be included in the rate quoted.

M&L in repairs for brazing of existing copper strip of any size, any height (wall/roof) at various places complete all as specified and directed by Engr-in-Charge.

M&L in repairs for electric welding of existing GI strip of any size, any height (wall/roof) at various places complete all as specified and directed by Engr-in-Charge.

Disconnecting and removing the unserviceable test point terminal block and material and labour for test terminal block made out of gun metal of phosphorus bronze size 75x75x25mm, drilled and secured including 3 Nos 8mm dia, 25mm long hexagonal head brass screws complete all as specified and as diretedby Engineer in charge.

Supply & replacement of GI funnel alongwith wire mesh in replacement of missing/unserviceable item complete all as specified and directed by Engr-in-Charge.

Demolition of old broken earth pit chamber and Renewing the earthing chamber pit of size 450X450X300mm ( external) & 250X250X250mm ( Internal) with PCC 1:3:6 type C-1by using 20 mm graded crushed stone aggregate and 40 mm thick RCC precast cover slab of 1:2:4 type B-1by using 20mm graded stone aggregat,e reinforced with 8mm TMT bars @ 100 mm C/C on both sides and replacing broken water/earth lead pipe, funnel etc complete all as pecified and as directed.

Supply & replacement of GI strip 32 mm x 6 mm by brazing/electric welding with saddles and fixing screws on porcelain insulators not less than 0.5 mtrs c/c for roof conductors and down conductors above from ground level or on wall/floor or buried in ground complete all as specified and directed by Engr-in-Charge.

All as per item no. 9.00 here-in-above but GI strip of size 25 mm x 4 mm

All as per item no. 9.00 here-in-above but aluminium strip of size 25 mm x 3 mm

All as per item no. 9.00 here-in-above but copper strip of size 20 mm x 3 mm

Disconnecting and removing unserviceable copper strip and material 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 32 x 6 mm copper strip complete all as specified and as directed by Engineer in charge.

All as per item no. 13.00 here-in-above but GI wire of size 4 mm dia

Supply & replacement of Air termination single pointed Aluminium rod size of 12 mm dia & 300 mm long with fixing socket complete all as specified and directed by Engr-in-Charge.

M&L for earthing complete with copper plate electrode of size 60cm x 60cm x 3.15 mm thick burried directly in ground vertically at a depth not less than 2.25 metre deep below normal ground level with top edge of the plate not less than 1.5 metre below normal ground level surrounded from all sides by 15 cm thick packed layer of charcoal dust and common salt, filling in alternate layer and electrode connections by using 32 X 6 MM size of copper strip by means of bolts, nuts, check nuts and washers made of copper and protected by light grade 40 mm dia GI pipe connected to main switch board or main control board, and GI pipe light grade 20 mm bore for watering and including funnel, wire mesh, RCC pit cover with handle and PCC chamber pit with PCC 1: 3:6 type C1 and earth pit angle iron 25x25x3mm including excavation and earth work, disposal of surplus soil to a distance not exc. 50 mtr all as specified and as shown on Plate No 3 of SSR Part I (2009)and Part II (2010) incl dismanteling of existing unserviceable earth pit complete all as specified and directed by Engr-in-Charge. Note: - (i) The concrete pit shall be PCC 1:3:6 type C-1, 40mm thick pre-cast cover slab of RCC (1:2:4) type B-1 using 20mm graded crushed stone aggregate, reinforced with 8mm TMT bars @ 10 cm c/c on both sides with suitable cast iron handle shall be provided in lieu of cast iron cover shown in Electrical Plate No. 3 of MES SSR Part-I, (ii) Item includes the cost of GI pipe up to 7.50m for protection of earth wire/strip, (iii) Item includes the cost of earth lead wire/strip up to7.50m & (iv) PCC pit shall be provided at least 500mm away from the pit and not on the earth pit itself and the extra cost of additional length of watering pipe, bends, elbow etc shall be deemed included in the unit rate quoted.

M&L for earthing complete with galvanized earth plate electrode of size 60cm x 60cm x 6 mm thick burried directly in ground vertically at a depth not less than 2.25 metre deep below normal ground level with top edge of the plate not less than 1.5 metre below normal ground level surrounded from all sides by 15 cm thick packed layer of charcoal dust and common salt, filling in alternate layer and electrode connections by using 32 X 6 MM size of galvanized iron strip by means of bolts, nuts, check nuts and washers made of galvanized earth and protected by light grade 40 mm dia GI pipe connected to main switch board or main control board, and GI pipe light grade 20 mm bore for watering and including funnel, wire mesh, RCC pit cover with handle and PCC chamber pit with PCC 1: 3: 6 type C1 and earth pit angle iron 25x25x3mm including excavation and earth work, disposal of surplus soil to a distance not exc. 50 mtr all as specified and as shown on electric plate No 3 of SSR Part I (2009) and Part II (2010) incl dismanteling of existing unserviceable earth pit complete all as specified and directed by Engr-in-Charge. Note: - (i) The concrete pit shall be PCC 1:3:6 type C-1, 40mm thick pre-cast cover slab of RCC (1:2:4) type B-1 using 20mm graded crushed stone aggregate, reinforced with 8mm TMT bars @ 10 cm c/c on both sides with suitable cast iron handle shall be provided in lieu of cast iron cover shown in Electrical Plate No. 3 of MES SSR Part-I, (ii) Item includes the cost of GI pipe up to 7.50m for protection of earth wire/strip, (iii) Item includes the cost of earth lead wire/strip up to7.50m & (iv) PCC pit shall be provided at least 500mm away from the pit and not on the earth pit itself and the extra cost of additional length of watering pipe, bends, elbow etc shall be deemed included in the unit rate quoted.

M&L for earthing complete with galvanized earth plate electrode of size 60cm x 60cm x 6 mm thick burried directly in ground vertically at a depth not less than 2.25 metre deep below normal ground level with top edge of the plate not less than 1.5 metre below normal ground level surrounded from all sides by 15 cm thick packed layer of charcoal dust and common salt, filling in alternate layer and electrode connections by using 4 MM dia of galvanized iron earth wire by means of bolts, nuts, check nuts and washers made of galvanized earth and protected by light grade 15 mm dia GI pipe connected to main switch board or main control board, and GI pipe light grade 20 mm bore for watering and including funnel, wire mesh, RCC pit cover with handle and PCC chamber pit with PCC 1: 3: 6 type C1 and earth pit angle iron 25x25x3mm including excavation and earth work, disposal of surplus soil to a distance not exc. 50 mtr all as specified and as shown on Plate No 3 of SSR Part I (2009) and Part II (2010) incl dismanteling of existing unserviceable earth pit complete all as specified and directed by Engr-in-Charge. Note: - (i) The concrete pit shall be PCC 1:3:6 type C-1, 40mm thick pre-cast cover slab of RCC (1:2:4) type B-1 using 20mm graded crushed stone aggregate, reinforced with 8mm TMT bars @ 10 cm c/c on both sides with suitable cast iron handle shall be provided in lieu of cast iron cover shown in Electrical Plate No. 3 of MES SSR Part-I, (ii) Item includes the cost of GI pipe up to 7.50m for protection of earth wire/strip, (iii) Item includes the cost of earth lead wire/strip up to7.50m & (iv) PCC pit shall be provided at least 500mm away from the pit and not on the earth pit itself and the extra cost of additional length of watering pipe, bends, elbow etc shall be deemed included in the unit rate quoted.

M&L for chemical earthing (SEE) using corrosion resistant Earth electrode 3.00 mtr length made with dual pipe technology, consists of primary G.I.Conductor (80 mm dia outer pipe) and secondary G.I.Conductor (40 mm dia inner pipe) galvanization (deep zinc & alloy coated) is 80 – 100 microns, secondary Conductor is inserted inside the primary Conductor, inner space between the primary and the secondary electrode is duly filled with a highly conductive and non-corrosive compound which safeguards the electrode getting corrode over a long period of time under the soil. Inner space is filled with highly conductive, corrosion resistant crystalline mixture (CCM) which provides low earth resistance during all seasons, connected with copper strip of size 32 x 6 m, and sourrounded with environment friendly earth enhancing BACKFILL compound (Electrodite) including necessary testing & commissioning complete all as specifie and directed by Engineer-in-charge. Make: Ashlok or its equivalent Note :-(i) The Earthing shall comply to IS - 3043 (ii) Three Nos earthing electrode shall be used for each grid and it shall be connected together for obtaining lowest earth resistance which shall be less than one ohm. (iii) Electrode and grid connecting copper strip of size 32 x 6 mm shall be welded using exothermic welding for interconnecting the earth electrodes and from earth to grid point up to 7.5 m along with 40 mm dia GI light grade protection pipe. (iv) The carbon based compound shall have a resistance value of less than 01 ohm. The compound shall be filled up to required level ie (3 .0 mtr ) of earth pit. (v) The dia of bore hole for earth electrode shall not be less than 100 mm (125-150 mm) depth of 3.0 mtr from GL and the extended rod shall be driven to a total depth of 3 mtr.

vi) Provn of earth pit chamber of internal size 300 x 300 x 300 mm depth built in brick work with cast Iron cover slab for each Earthing all as directed by Engineer-in-charge. (vii) Necessary earth work excavation in any type of soil, returning filling and making good by pouring water on the surrounding area complete for proper compaction of earth. (viii) All the joints Except test point shall be welded/ brazed properly and the copper earth strip whenever laid on the wall, floor etc shall be fixed on FRP/ DMC insulators not more than 500 mm apart also included in quoted rates. (ix) The contractor shall have to give guarantee for maintaining earth resistance of less than one ohm for a period of 05 years certified date of completion and to deposit security deposit for Rs 2000/- per each for a period of five years.

Supply & replacement of 40 mm dia GI pipe, light grade for earth strip protection/for lighting arrester with all fitting/fixtures and necessary brick work for fixing GI pipe etc. including cutting to desired length complete all as specified and directed by Engr-in-Charge.

M&L for PCC 1:2:4 type B1 using 20 mm graded crushed stone aggregate in coping, including necessary form work and Fair finish to exposed surfaces without using extra cement, including old demoltion unserviceable concrete and disposal of concrete demolish materials complete all as specified and directed by Engr-in-Charge.

Supply & replacement of porcelain supporting ridge type insulator of size 75x75x40mm size with 1 No GI bolt of 65mm dia and 40mm long with nut and washer and 2 Nos GI bolt of 10mm dia and 50mm long with nut and wahsers for fixing on wall / roof for insulating and supporting the lighting strips to protecting lighting complete all as specified and directed by Engr-in-Charge.

Godara Construction and General Suppliers

M/S Dharam Chand Lal Chand Jain

Rasam Engg Co.

National Rewinding Works

M.D. CONSTRUCTION CO.