SPECIAL REPAIRS FOR REPLACEMENT OF UNSERVICEABLE EARTHING AT CERTAIN LOCATIONS AT 2AFSB MYSORE UNDER AGE I AF CHIMNEY HILLS

Amount

M&L for replacement in earthing complete with galvanised steel plate electrode of size 600mmx600mmx6mm thick burried directly in ground verticalIy to a depth not less 2.25m below ground level with top edge of the earth plate not less than l.5mtr below normal ground level connected to galvanised earth lead wire 4.0mm dia by means with bolt, check nut and washers protected by Gl light grade pipe of size 20mm dia and connecting up with the DB, including excavation, earthwork, PCC Chamber, RCC Cover, watering pipe 15mm dia GI Medium grade with funnel and wire mesh, Charcoal, salt, all as per plate no.3 of SSR 1991 and including painting and wiritng the earth value on the MS sheet cover all as applicable and as per direction given by Engr in charge

M&L for replacement in earthing with copper plate electrode 600mm x600mmx 3.15mm thick burried directly in ground (Earth pit not less than 2.25 mtr deep below normal ground level ) with top edge of earth plate not less than 1.5 metres below normal ground level, connected to copper strip 20x3 mm dia connected to earth plate electrode by means of copper bolt, check nut and washers, earth wire protected with 40 mm bore light grade GI pipe all as shown in electrical plate no 3 of MES schedule part-1, with and including PCC 1:3:6 type C1 pit with cover of RCC 1:2:4 type B1, reinforced with welded steel wire fabric not less than 4 kg per sqmtr with handle and angle iron frame, watering arrangement with 20 mm bore GI medium grade pipe, GI funnel with wiremesh, filling with mixture of common salt and charcoal, necessary excavation, refilling, removing away soil and earth work in any type of soil, including test point, testing and commissioning complete including painting and wiritng the earth value on the MS sheet cover all as applicable and as per direction given by Engr in charge.

M&L for replacement in earthing complete with galvanised steel plate electrode of size 600mmx600mmx6mm thick burried directly in ground verticalIy to a depth not less 2.25m below ground level with top edge of the earth plate not less than l.5mtr below normal ground level connected to galvanised iron strip of 32mm X 6 mm dia by means with bolt, check nut and washers protected by Gl light grade pipe of size 40mm dia and connecting up with panel/eqpt as the case may be upto a maximum distance of 7.5m away from the earth electrode including test point junction, excavation, earthwork, PCC Chamber, RCC Cover, watering pipe 20mm dia GI Medium grade with funnel and wire mesh, Charcoal, salt, all as per plate no.3 of SSR 1991 and as directed by Engineer in charge

M & L for replacement of GI earthing with maintenance free and enviroinment friendly earthing complete with earth electrode set comprising of low carbon steel rod 17.2 mm dia and 3000 mm long molecular copper bonded for a thickness of 250 microns, with an exotheramically welded copper clamp and 1 bag of 30 kg loresco powder set carbon based environment friendly backfill compound and suitable copper clamp connected to copper earth strip of size 20mm x 3mm by means of bolt, check nut and washers of tinned copper / brass in addition to brazing of all joints and earth strip protected by GI pipe 40 mm bore light grade including on test point and connected to switch / control board upto 7.5 mtr away from earth work , PCC (1;3:6) type C1 chamber and MS sheet 5 mm thick with hinges to cover the chamber including painting and wiritng the earth value on the MS sheet cover all as applicable and as per the specification given by manufacturer all as directed. Note: More than 7.5 mtr of earth strip GI pipe shall be measured and paid separately.

Supply & Fixing earth conductor or main earthing lead fixed on 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 and the size is 32mm x 6mm Gaivanised Iron strip

All as per Item No. 5 above but 20mm x 3.15 mm Copper strip

LAKSHMI CONSTRUCTIONS

S R Trading Co

VARGHESECHACKO AND CO

SAPTHAGIRI CONSTRUCTIONS

Power and Telecom Systems

M/S SRI BALAJI ENTERPRISES