Description :
Tenders for Repair, Maintenance, And Installation Of Plant/ Systems/equipments (version 2) - Defence Area; Repair/maintenance Old Unserviceable Critical Equipment Chemical Earthing; Service Provider.-1) M & L For Replacement Of Old Defective Earthing By Providing New Chemical Earthing Comprising Copper Earth Plate Electrode 900 X 600 X 5 Mm Thick Burried Directly In Ground, Earth Pit Not Less Than 5.10 Metres Below Normal Ground Level And Complete Size Of Pit Shall Be 1.60 M X 1.60 M X 5.10 Metres, With Top Edge Of The Plate Not Less Than 3.75 Metres Below Normal Ground Level, Earth Plate Surrounded From All Sides By 20 Cm Thick.salt, Chareeal Dust, Magnisium Sulphate And Enhancing Back Fill Compound (powder) Suitable To Increase The Earth Resistant Value Filling In Alternate Layers Of 20 Cm Thick Up To 1.8 Metres Height And Including Connected To Copper Strip 32 X 6 Mm (upto 7.5 Metres) By Means Of Brazing / Coppers Nut-bolts, Earth Strip Protected With 65 Mm Bore Light Grade Pipe From Electrode And Upto Test Point, 15 Mm Bore Watering Pipe Light Grade Gi Funnel, Wire Mesh, Including Excavation, Removal Surplush Soil To A Distance Not Exc. 50 M, 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 B1, Using 20 Mm Graded Stone Aggregate Reinforced With 8 Mm Dia Mild Steel Deformed Bars @ 75 Mm Centre To Centre Both Ways Complete All As Specified And Directed, 2) S&f Test Point Termination Block Made Of Gun Meetal Or Phosphorus Bronze Size 75 X 75 X 25 Mm Drilled And Screwed Including 3 Nos. 8 Mm Dia 25 Mm Long Hex Head Screw Complete All As Specified And Directed, 3) Earth Continuity Conductor Or Main Earthing Lead Fixed To Wall On Battern Or Recess Of Chases Or Burried In Ground Or Drawn In Conduit/pipe Of Size 20 X 3 Mm Copper Strip Complete All As Specified And Directed, 4) S & F High Density Polyethylene Pipes (hdpe)of Dia 40mm As Earthing Contunuity Protection Laid In Trenches/wall/floor Complete All As Specified And Directed.
