8809 PERIODICAL SERVICING, CHECKING, RECHARGING AND REPAIR OF VARIOUS TYPES OF EARTHING IN TECHNICAL AREA, WSA ALONG WITH EARTHING OF INSTALLATIONS ETC. UNDER GE (AF) BAREILLY

Amount

M&L for replacement of old defective earthing by providing new earthing comprising of galvanized steel earth plate electrode 600mm X 600mm X 6mm thick buried directly in ground (earth pit not less than 2.25m below ground level) with top edge of earth plate not less than 1.50m below normal ground level, connected to galvanized earth strip of size 32 X 6mm by means of nuts, bolts, check nuts & washers of galvanized iron or steel all as shown on electrical plate No. 3 of MES schedule 2009, Part–I (Specifications) and connected to main switch board/ main DBs/ earthing test point including all necessary excavation and earth work in any type of soil, adequate quantity of charcoal dust & common salt all around the earth plate minimum 150 mm in all directions with & including watering pipe 20mm dia GI medium grade, GI funnel made out of 0.63mm thick GI sheet, wire gauge, 50 mm thick RCC cover in cement concrete 1:2:4, type B-1, duly reinforced with 8mm dia mild steel TMT bars @ 100mm c/c both ways with suitable lifting handle made of 10mm dia MS round bar to lift the cover, earth pit of PCC 1:3:6 type C-1, GI protection pipe light grade 40mm bore including testing on completion of job complete all as specified and directed.

All as per Item No. 1.00 hereinbefore but using 4.00mm dia GI earthing wire and 15mm bore GI light grade protection pipe complete all as specified and directed.

M&L for replacement of old defective earthing by providing new earthing comprising of copper earth plate electrode 600mm X 600mm X 3.15mm thick buried directly in ground (earth pit not less than 2.25 m below ground level) with top edge of earth plate not less than 1.50m below normal ground level, connected to copper earth strip of size 20x3mm by means of copper nut-bolts, check nuts and washers all as shown on electrical plate No. 3 of MES Schedule 2009, Part–I (Specifications) and connected to main switch board/ main DBs/ earthing test point including all necessary excavation and earth work in any type of soil, adequate quantity of charcoal dust and common salt all around the earth plate in alternate layers minimum 150mm (compacted thickness) in all directions with and including watering pipe 20mm dia GI light grade, GI funnel made out of 0.63mm thick GI sheet, wire gauge, 50mm thick RCC cover of size 450mm X 450mm in cement concrete 1:2:4, type B-1, duly reinforced with 8mm dia mild steel TMT bars @ 100mm c/c both ways with suitable lifting handle made of 10mm dia MS round bar to lift the cover, earth pit of PCC 1:3:6 type C-1, GI protection pipe light grade 40 mm bore including testing on completion of job complete all as specified and directed.

M&L for replacement of old defective earthing by providing new chemical earthing comprising copper earth plate electrode 900x600x5mm thick buried directly in ground, earth pit not less than 5.10 metres below normal ground level and complete size of pit shall be 1.60m x 1.60m x 5.10m with top edge of the plate not less than 3.75m below normal ground level, earth plate surrounded from all sides by 20cm thick salt and charcoal dust and Magnesium sulphate filling in alternate layers of 20cm thick up to 1.8 metres height and including connected to copper strip 32 x 6mm (up to 7.5 Metres) by means of brazing/ copper nut-bolts, earth strip protected with 65mm bore light grade pipe from electrode and up to and including the earth test point of galvanized iron/ steel of size 75 x 75 x 25 mm test point, 15mm bore watering pipe light grade GI funnel, wire mesh, earth plate surrounded from all sides by 20 cm thick salt (40 Kg), charcoal dust (40 Kg) and Magnesium sulphate (50 Kg) filling in each alternate layers up to 1.80m height including excavation, removal surplus soil to a distance not exc. 50m, PCC pit in PCC (1:3:6) type C-1, using 20 mm graded stone aggregate, RCC cover 40 mm thick in RCC (1:2:4) type B-1, using 20mm graded stone aggregate reinforced with 8 mm dia mild steel deformed bars @ 75 mm c/c both ways complete all as specified and directed. Note for Sl. No 1 to 4 : On testing after completion of job, if desired earth resistance (i.e. less than one ohm) is not obtained, the earthing shall be redone by the contractor without any extra cost to govt.

M&L for repairing to existing defective earthing by taking out carefully earth plate, watering pipe, protection pipe and re-buried the same after removing sludge from the plate and pipes; the earth plate shall be buried directly in ground with top edge of earth plate not less than 1.50m below normal ground level, connected to GI earth wire or GI/ copper earth strip of any size by means of nut-bolts, check nuts and washers of galvanized iron or steel all as shown on electrical plate No. 3 of MES schedule 2009, Part–I (Specifications) and other end connected to main switch board/ main DBs/ earthing test point including all necessary excavation and earth work in any type of soil, adequate quantity of charcoal dust & common salt in alternate layers all around the earth plate minimum 150mm in all directions with & including GI funnel made out of 0.63mm thick GI sheet, wire gauge, 50mm thick RCC cover in cement concrete 1:2:4, type B-1, duly reinforced with 8mm dia mild steel TMT bars @ 100mm c/c both ways with suitable lifting handle made of 10mm dia MS bars to lift the cover, earth pit of PCC 1:3:6 type C-1, as required at site to complete the earthing including testing of earthing on completion of job complete all as specified and directed. Note for Sl. No 5: On testing after completion of job, if desired earth resistance (i.e. less than one ohm) is not obtained, the earthing shall be redone by the contractor without any extra cost to govt. The earth plate, protection pipe and watering pipe of old earthing shall only be reused in the same pit. Rest of the materials as required shall be provided by the contractor.

M&L for re-construction of cement concrete earth pit chamber in PCC 1:3:6, type C-1 all as shown on electrical plate No. 3 of MES schedule 2009, Part–I (Specifications) with 450 X 450 X 50mm thick Pre-cast RCC cover in cement concrete 1:2:4, type B-1, duly reinforced with 8mm dia mild steel TMT bars @ 100mm c/c both ways with suitable lifting handle made of 8mm dia MS round bar to lift the cover with and including necessary excavation, earth work in any type of soil and dismantling of old broken earth pit chamber and disposal of spoil to a distance not exceeding 50 m compete all as specified and as directed.

S&F in repair 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 screws for holding the bronze plate including fastening/ bolting the roof down conductor and earth electrode over the bronze plate with copper bolts & nuts of suitable size, providing 10mm thick fibre sheet of size 15x15cm below the test point to avoid direct contact with wall including enclosing the test point with 1.6mm thick MS sheet front openable box duly painted complete all as specified and as directed.

M&L for re-painting of old existing cement concrete earth pit chamber in colour code as white for conventional, yellow for copper conventional and red for chemical including preparation of surface with two coats of synthetic enamel paint including preparation of surfaces, removal of dust etc. complete all as directed by Engineer-in-Charge.

S&F in repairs earth continuity conductor or main aluminium strip of size 25x3mm buried in ground/ fixed to wall or any other indicated situation for loop earthing and the like up to test point fixed on necessary insulators and fastening screws, rawl plugs complete all as specified and directed. Note: The joints of each lead strip shall be welded/ brazed and the cost of brazing/ welding shall deem to be included in unit rate of this item.

All as per item No. 9 hereinbefore but copper strip of size 20x3mm

All as per item No. 9 hereinbefore but copper strip of size 32x6mm

All as per item No. 9 hereinbefore but 4 mm dia GI wire

S&F in repairs 40mm bore dia GI tubing light grade with all fittings including fixing arrangement with screws, clamps on insulator for protection of aluminium/ copper earth strip from ground level to test point or looping on floor/ wall complete all as specified and directed.

S&F in repairs 40mm bore dia GI tubing, medium grade with all fittings including fixing arrangement with screws, reducer and clamps fixing on wall/ roof as lightening protection complete all as specified and directed.

S&F in repairs 50mm bore dia GI tubing light grade with all fittings including fixing arrangement with screws, clamps on insulator for protection of aluminium/ copper earth strip from ground level to test point or looping on floor/ wall complete all as specified and directed.

S&F in repairs 50mm bore dia GI tubing, medium grade with all fittings including fixing arrangement with screws, reducer and clamps fixing on wall/ roof as lightening protection complete all as specified and directed.

S&F High density polyethylene pipes (HDPE) of dia 32mm as earthing continuity protection laid in trenches/ wall/ floor complete all as specified and directed

M&L for earthing enhancing back fill compound (Powder) suitable to increase the earth resistant value complete all as specified and directed. Make: Ennov/ True Power Earthing/ Alopp/ Gravin

Cutting/ clearing grass/ bushes around existing serviceable earthing chamber pit, re-aligning the disturbed earthing strip, making good the PCC chamber as required at site with PCC 1:3:6, type C-1 including filling the soil around chamber and removing surplus soil complete all as specified and directed

S&F as in replacement single pointed air termination aluminum rod, 12mm dia and 300mm long including 20mm size air terminal base/ ridge saddle made of gun metal with and including fixing arrangement on the ridge of RCC roof / on pole as required complete all as specified and directed.

S&F as in replacement single pointed air termination copper rod, 12mm dia and 300mm long including 20mm size air terminal base/ ridge saddle made of gun metal with and including fixing arrangement on the ridge of RCC roof / on pole as required complete all as specified and directed.

M&L for cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint complete including dismantling existing rusted sections all as directed.

S&F suitable size 'F' class bridge insulators of non hygroscopic non combustible, track resistant, high strength FRP/ SMC/ DMC material suitable for separator/ spacer of aluminium strip from the steel pole. Note: Fixing accessories such as clamps, nuts, bolts, washers etc. shall be measured and paid separately under respective items mentioned here-in-before.

Deduct: Amount of Schedule of Credit b/f from Sl. Page No. 16 of tender document i.e. Rs. 1,03,230/-

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