PROVISION OF LIGHTENING ARRESTOR AT OTES AND MT SECTION AT AF STN CHIMNEY HILLS

Amount

S & F copper strip 20 x 3mm with saddles and fixing screws for fitting screws etc. for roof conductors and down conductors above ground.

S & F single pointed air termination Coper rod 12mm dia and 300mm long and fixing to GI pipe with clamps, nuts, bolts and washers complete all as specified and directed by Engineer-in- Charge.

S&F High density polyethylene pipes(HDPE) of 40 mm dia pressure rating 6 kgf/cm2 laid in trenches and fixed on poles all as specified and directed by Engineer-in-Charge.

M&L for cutting road / hard standing to depth not exceeding 60 CM and to width not exceeding 45 CM for laying HDPE Pipes and making good the disturbed surfaces by 1:3:6 type C1 using 20 mm graded stone aggregate complete all as specified and as directed by Engineer-in-Charge.

Supply and fixing steel tubing, light grade, galvanised with all fittings, 25mm bore, 1.50m long on the roof and fixing with in PCC 1:2:4, type B-1 of 300mm x 300mmx300mm. all as specified and directed by Engineer-in-charge.

M & L Foundation for making base of PCC 1:2:4, type B-1 of 300mm x 300mmx300mm for GI pipe and air termination rod including necessary frame work and finishing the exposed surface even and smooth with out using extra cement complete all as specified and directed at site.f complete all as specified

M & L for Earthing complete with Copper earth plate electrode 60 cm x 60 cm x 6 cm thick buried directly in ground vertically at a depth not less than 2.25 m below normal ground level with top level of earth plate at depth not less than 1.5 m below normal ground level surrounded form all sides by 15 cm thick and packed layer of charcoal dust and common salt filling in alternate layers and electrode connection by using 20×3mm copper strip by means of bolts, nuts, check nuts and washers of galvanized iron upto test point and protected by GI pipe light grade 40 mm bore up to 7.5 Mtr connected to a main switch board or main control board and GI pipe light grade 20 mm bore for watering and including funnel, wire mesh, 80 mm thick pre-cast RCC 1:2:4, type B-1 cover reinforced with hard drawn steel wire fabric weighing not less than 4 Kg/Sqm in lieu of CI cover, PCC 1:3:6 type C2 pit / chamber including all necessary excavation and earth work, disposal of surplus soil to a distance not exceeding 50 m all as specified and as shown in Electrical Plate No3 of MES Schedule Part – I of 2009.

M&L test point terminal block made of gun metal or phosphorus bronze 75mmx75mmx25mm, drilled and screwed including 3 Nos. 8mm dia. 25mm long hex. Head screw complete all as specified and directed by Engineer-in-Charge.

manoj builders and consultants (BID ID -3123040)

SREE VINAYAKA ENTERPRISES (BID ID -3124798)