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| 1 | M& L for Chemical earthing with copper earth plate 90x60cmx5mm buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to Copper strip 50×6mm as earthing lead (7.5 Meters) by means of Copper bolts, nuts, check nuts and washers of copper including macronite chemical 150 mm thick homogeneous layer all around the Copper earth plate, all as shown in electrical plate No. 3 connected to earthing test point all as specified or indicated including testing on completion complete all as specified and directed. |
| 2 | Disconnecting and taking down unserviceable earthing any type & size including all accessories from installations/bldgs/communication centres complete all as directed by Engr-in-Charge. |
| 3 | Disconnecting and taking down unserviceable earth continuity conductor of any type & size complete all as directed by Engr-in-Charge. |
| 4 | M& L for earthing complete with galvanized steel earth plate, electrode 600 x 600x6 mm thick , buried directly under ground (earth pit not less than 2.25 m below ground level ) with top edge of the plate not less than 1.5 below ground level connected to galvanized strip 32x6mm by means of nuts, bolts, check nuts & washers, of galvanized iron or steel all as Shown in electrical plate No 3 on Sl. Page 19-497 of MES schedule 2009 part I and connected to existing equipment/system, including all necessary excavation & earth work in hard/dense soil, common salt and charcoal dust mixed & packed 150 mm thick homogeneous layer all around the GI earth plate, GI protection pipe 40mm light grade upto 7.5 meter from electrode complete all as specified & shown on drawings with watering pipe medium grade 20mm dia ,GI sheet funnel with wire mesh ,RCC precast cover 1:2:4 type B1 duly reinforced with TMT bar 8mm dia at the rate of 150mm centre to centre both ways with suitable lifting handle ,pit/chamber in PCC 1:3:6 type C1 ,Angle iron 40x40x5mm frame for pit cover including testing on completion complete all as specified and directed. |
| 5 | All as per item no 4 above but using GI Lead wire 4 mm dia as earthing lead complete all as specified and directed. |
| 6 | All as per item no 4 above but using copper plate 60×60cm ×3.15mm thick electrode and 20×3mm copper strip as earthing lead complete all as specified and directed. |
| 7 | S&F Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or burried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 4mm dia galvanised iron or steel wire complete all as specified and directed. |
| 8 | S&F Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or burried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 32x6mm galvanised iron strip complete all as specified and directed. |
| 9 | S&F Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or burried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 20x3mm copper strip complete all as specified and directed. |
| 10 | S & F in replacement, Stop valves, castcopper alloy,screwed down,high pressure,with crutch or butterfly handle,screwed both ends for ironpipe or for unions 15 mm dia in each earth pit at 66 KV Switch yards earthing water supply system complete all as specified and directed |
| 11 | S & F in replacement,Tubes, 'medium grade',galvanised,with all fitting;laid in trenches 15 mm dia GI pipe with existing by means of suitable socket to make functional water supply system at each earth at 66 KV Switch yards complete all as specified and directed |
| 12 | S & Fill salt suitable for earthing complete including filling in earthing funnel with water all as directed to improve the earth result of the entire earth pit and testing earth resistance complete |
| 13 | M & L for constructing of brick mesonary pits of internal dimensions 0.3 mtr x 0.3 mtr x0.3 mtrs (finished size of pit) ( bottom PCC floor of the pit should be minimum 30 cms below the bottom surface of sluice valve flange to provide sufficient working space) , bottom floor of the pit be constructed in PCC (1:3:6) 15 cms thick with 20 mm graded stone aggregate, inner and exposed surfaces and bottom floor of the pit should be plastered in CM (1:4) 15 MM thick. The sluice valve and other fittings should be housed in center of the pit. the vertices of the pit should in right angle and champhered .The top cover of the pit will be made out of MS sheet min 3.15 mm thick witth angle iron frame made out of MS angle 40mm x40 mmx 5 mm with galvanised steel hindges two nos ,and locking arrangements duly painted with two coats of water resistant synthetic enamelled paint over one coat of red oxide complete all as specified and directed by Engr-in-charge. |
| 14 | M&L in repair Copper lightning arrester ESE non corrosive type of 15 mtr heigh if ground mounted or 8 mtr heigh in case of building mounted with base plate not less than 300x300x6mm including mounting arrangement and two set of earths having protection radius 107 Sq mtr,lightning impulse current- 200 kA (10/350 Micro sec) , protection level-4 including data reciver box capable to transmit data through i-cloud to any desktop web page or application having 6 digit non re-setable display with IP65 protection,70 sqmm single core copper cable for earth connection and manufacturer should be CPRI approved complete all as specified and directed by Engr-in-charge. Please Enable Macros to View BoQ information |
