REPAIR/MAINT OF EARTHING AND LIGHTENING ARRESTOR AT PH-2 AREA UNDER GE PANAGARH (2ND CALL)

Amount

Taking down old U/S Earthing of any type with accessories complete all as specified and directed.

M&L for earthing with galvanised earth plate electrode 600 x 600 x 6 mm thick burried directly in ground (earth pit not less rhan 2.25 m deep below normal ground level) with top edge of plate not less than 1.5 meter below normal ground level, the earth plate surrounded by alternative layer of charcoal dust and salt with thickness of 150 mm to a packed thickness of 150 mm on all sides with and including necessary excavation earth work returing filling in and removal of surplus soil upto 50 mtr including galvanised iron Strip 25x4 mm bolted and reverted to earth plate at one end and connected to continuous GI strip encased in and including 40 mm dia GI light grade protection pipe, 20 mm dia medium grade watering pipe with all fittings from top edge of earth plate upto 2400 mm above ground level fixed and including 25x 3 mm GI clamp bolts nuts and washer, funnel, wiremesh, PCC (1:3:6) type C1 earthing pit, 75 mm thick RCC cover slab reinforced with 8 mm dia TMT bar 100 c/c both ways completeall as specified and as shown in electrical plate No. 2 of SSR Part I including testing on completion.

M&L for earthing with galvanised earth plate electrode 600 x 600 x 6 mm thick burried directly in ground (earth pit not less rhan 2.25 m deep below normal ground level) with top edge of plate not less than 1.5 meter below normal ground level, the earth plate surrounded by alternative layer of charcoal dust and salt with thickness of 150 mm to a packed thickness of 150 mm on all sides with and including necessary excavation earth work returing filling in and removal of surplus soil upto 50 mtr including galvanised iron Strip 32x6 mm bolted and reverted to earth plate at one end and connected to continuous GI strip encased in and including 50 mm dia GI light grade protection pipe, 20 mm dia medium grade watering pipe with all fittings from top edge of earth plate upto 2400 mm above ground level fixed and including 25x 3 mm GI clamp bolts nuts and washer, funnel, wiremesh, PCC (1:3:6) type C1 earthing pit, 75 mm thick RCC cover slab reinforced with 8 mm dia TMT bar 100 c/c both ways completeall as specified and as shown in electrical plate No. 2 of SSR Part I including testing on completion.

M & L for Chemical copper bonded electrode pipe earthing complete set consist of 40 mm dia ISI marked GI Pipe 2.0 m long with copper strip 25x3 mm encased in and inner space of pipe is filled with highly conductive corrosion resistant chemicals completely sealed, buried directly in ground (earth pit not less than 2.25 m deep below the normal ground level) filling chemical ground enrichment material minimum 10 kg surrounding pipe and mixed properly with water, connected to earth test point including 40 mm dia GI light grade pipe for protection of earth strip and testing complete all as specified and directed by Engr-in-Charge including necessary excavation earth work returing filling in and removal of surplus soil upto 50 mtr including Copper strip 25x3 mm bolted and reverted to copper bonded elctrode pipe at one end and connected to continuous copper strip encased in and including 40 mm dia GI light grade protection pipe, including 25x 3 mm GI clamp bolts nuts and washer, PCC (1:3:6) type C1 earthing pit, 75 mm thick RCC cover slab reinforced with 8 mm dia TMT bar 100 c/c both ways completeall as specified and as shown in electrical plate No. 2 of SSR Part I including testing on completion.

M & L for Chemical GI bonded electrode pipe earthing complete set consist of 50 mm dia ISI marked GI Pipe 2.0 m long with GI strip 32x6 mm encased in and inner space of pipe is filled with highly conductive corrosion resistant chemicals completely sealed, buried directly in ground (earth pit not less than 2.25 m deep below the normal ground level) filling chemical ground enrichment material minimum 10 kg surrounding pipe and mixed properly with water, connected to earth test point including 50 mm dia GI light grade pipe for protection of earth strip and testing complete all as specified and directed by Engr-in-Charge including necessary excavation earth work returing filling in and removal of surplus soil upto 50 mtr including GI strip 32x6 mm bolted and reverted to GI bonded elctrode pipe at one end and connected to continuous GI strip encased in and including 50 mm dia GI light grade protection pipe, including 25x 3 mm GI clamp bolts nuts and washer, PCC (1:3:6) type C1 earthing pit, 75 mm thick RCC cover slab reinforced with 8 mm dia TMT bar 100 c/c both ways completeall as specified and as shown in electrical plate No. 2 of SSR Part I including testing on completion.

M&L for earthing with copper earth plate electrode 600 x 600 x 3.15 mm thick burried directly in ground (earth pit not less rhan 2.25 m deep below normal ground level) with top edge of plate not less than 1.5 meter below normal ground level, the earth plate surrounded by alternative layer of charcoal dust and salt with thickness of 150 mm to a packed thickness of 150 mm on all sides with and including necessary excavation earth work returing filling in and removal of surplus soil upto 50 mtr including copper strip 20x3 mm bolted and reverted to earth plate at one end and connected to continuous copper strip encased in and including 40 mm dia GI light grade protection pipe, 20 mm dia medium grade watering pipe with all fittings from top edge of earth plate upto 2400 mm above ground level fixed and including 25x 3 mm GI clamp bolts nuts and washer, funnel, wiremesh, PCC (1:3:6) type C1 earthing pit, 75 mm thick RCC cover slab reinforced with 8 mm dia TMT bar 100 c/c both ways completeall as specified and as shown in electrical plate No. 2 of SSR Part I including testing on completion.

Materials 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 for 20x3 copper strip using porcelain clit/post insulators, complete including taking out old u/s copper strip all as specified and directed.

Materials 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 for 32x6 copper strip using porcelain clit/post insulators, complete including taking out old u/s copper strip all as specified and directed.

Materials 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 for 25x4 galvanised iron strip using porcelain clit/post insulators, complete including taking out old u/s galvanised iron strip all as specified and directed.

Materials 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 for 32x6 galvanised iron strip using porcelain clit/post insulators, complete including taking out old u/s galvanised iron stripall as specified and directed.

Materials 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 for 25 x 3 mm alumunium strip using porcelain clit/post insulators, complete including taking out old u/s alumunium strip all as specified and directed.

Supply and fixing GI tubing, 25 mm bore, light grade with all fittings laid in trenches or fixed to wall including taking down of existing pipes and removal from site complete all as specified and directed.

Supply and Fix test point terminal block made of gun metal or phosphorous bronze , size 75 X 75 X 25 mm , drilled and screwed including 3 Nos. 8 mm dia. 25 mm long hexagonal head screws in repair including MS box 2 mm thick of suitable size for protection of test point terminal complete including taking out old u/s test point terminal box all as specified and directed.

M & L for cutting existing steel tubing for additional/alteration (each cut measured) of size 25 mm to 50mm dia pipe complete all as directed by Engr-in-charge

M & L for screwing existing steel tubing 50mm dia for taking new branch connection and all as directed by EIC.

Supply and fixing GI tubing, 20 mm bore, medium grade with all fittings laid in trenches including taking down of existing pipes and removal from site complete all as specified and directed.

Supply and fixing bib tap, closing type of cast iron or malleable cast iron, galvanised screw for fixing to iron pipe of size 20 mm dia including taking down of existing bib tap and removal from site complete all as specified and directed.

Excavation in trenches not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth for taking out/laying of under ground cable and getting out in saft/loose strata complete all as specified.

Returning filling in including spreading watering levelling and well ramming in layers not exceeding 25 cm in soft/ loose soil.

Removing surplus excavated soil nexc 50 mtr and depositing where directed at a level not exceeding 1.5 mtr above the starting point.

Checking of existing old earthing pits and lightening conductors and repairs/replacement of GI/Aluminium strips where found corroded and repairs to pits and testing of earth resistance value and pouring salt/charcol for obtaining earth value below 5 ohm all as specified and as directed.

S& F Air termination, single pointed, aluminium rod 12mm dia and 300mm long fixed on aluminium strip for earth conductivity to ground complete including taking out old u/s air termination rod all as directed by engineer in Charge.

S& F Air termination, single pointed, Copper rod 12mm dia and 300mm long fixed on copper strip for earth conductivity to ground complete including taking out old u/s air termination rod all as directed by engineer in Charge.

Checking earth resistance value of existing all type of earthing ( in restricted and unrestricted area) from each earth test point and making data sheet as per direction of Engr-in charge Note: Earth resistance tester and other arrangement for testing are included in the cost of above job).

BANSAL CONSTRUCTION

ANSH CONSTRUCTION