CERTAIN DAY TO DAY MAINT OF INTERNAL E/M SERVICES EARTHING AND LIGHTENING ARRESTER AND ALLIED WORKS AT AF STN MEMAURA

M & L for earthing complete with galvanised steel pipe electrode, 40mm bore, medium grade, 2.5 metres length, buried directly and preferably vertically in ground with top edge not less than 1.25 metres below ground level connected with earthing lead of 4.0 mm dia galvanised iron or steel wire by means of bolts, nuts, check nuts, and washers of galvanized iron or steel including 15 mm dia. medium grade protection pipe for earth lead complete with charcoal and common salt including watering arrangement with galvanized iron pipe light grade 20 mm dia, PCC Chamber, CI frame and cover, MS funnel with wire mesh all as shown in electrical Plate No. 2 of SSR part I including excavation and earthwork in any type of soil/strata and all as specified and indicated including testing on completion, Note :- GI earth wire 4 mm dia and 15 mm dia protection pipe upto 7.5 mtr from earth plate is deemed to be included in rate quoted.

M&L earthing complete with galvanised steel earth plate electrode 60cmx60cmx6 mm thick buried directly in ground.(earth pit not less than 2.25 mtr deep below normal ground level) with top edge of plate not less than 1.5 mtr. Below ground level connecting to GI Strip 25X4 mm dia size by means of bolts, check nuts and washers of GI and earth wire protected by provision of GI pipe light grade, 15 mm bore including provn of concrete pit in PCC (1:2:4) type B-1 using 20 mm graded crushed stoned aggregates with 40 mm thick cover of RCC (1:2:4) reinforced with XPM (weight not less than 4 Kg/Sqm) and frame of angle iron 25x25 x3mm with lugs 2 Nos and with 6mm dia MS bar handle made to shape, GI medium grade 20mm bore pipe for watering perforated at bottom 1.75 mtr long placed on top edge plate, common salt and charcoal filling, test pont made out of phosphorous bronze with fixing arrangement, funnel, wiremesh and earth work in hard/dense soil, returning filling in and removal of surplus soil to a distance not exceeding 50 mtr, all as per electrical plate No 3 of SSR 2009 Part-I and connection all as specified and testing on completion.

M&L earthing complete with copper earth plate electrode 60cmx60cmx6 mm thick buried directly in ground.(earth pit not less than 2.25 mtr deep below normal ground level) with top edge of plate not less than 1.5 mtr. Below ground level connecting to copper strip 20X3 mm dia size by means of bolts, check nuts and washers of GI and earth wire protected by provision of GI pipe light grade, 15 mm bore including provn of concrete pit in PCC (1:2:4) type B-1 using 20 mm graded crushed stoned aggregates with 40 mm thick cover of RCC (1:2:4) reinforced with XPM (weight not less than 4 Kg/Sqm) and frame of angle iron 25x25 x3mm with lugs 2 Nos and with 6mm dia MS bar handle made to shape, GI medium grade 20mm bore pipe for watering perforated at bottom 1.75 mtr long placed on top edge plate, common salt and charcoal filling, test pont made out of phosphorous bronze with fixing arrangement, funnel, wiremesh and earth work in hard/dense soil, returning filling in and removal of surplus soil to a distance not exceeding 50 mtr, all as per electrical plate No 3 of SSR 2009 Part-I and connection all as specified and testing on completion.

Taking down earthing strip any type and any size.

Refixing of Alluminium strip 25x3.15 mm with welding,brazing and soldering and including accessories as saddles, conductor clamp, conductor support pyramid holdfast and fixing screws etc for roof conductors and conductors above ground all etc complete as specified and directed.

M & L of Alluminium strip 25x3.15 mm with accessories such as saddles, conductor clamp, conductor support pyramid holdfast and fixing screws etc for roof conductors and conductors above ground all etc complete as specified and directed.

M & L copper strip 20x3.15 mm with accessories such as saddles, conductor clamp, conductor support pyramid holdfast and fixing screws etc for roof conductors and conductors above ground all etc complete as specified and directed.

S&F Bib taps, cast copper alloy with crutch or butterfly handle, screwed down, screwed for iron pipe or for brass ferrule and fixed fancy type comple. (Minimum weight 15 mm-90 gms)

Repair/replacement for Earthing pit of precast PCC pit 1:3:6 type C1 using 20 mm bore grade stone aggregrate on PCC base 1:4:8 type using 40 mm aggregrate of size 450x450x50 mm thick 250mm height complete all as specified and directed.

Repair/replacement for Earthing pit precast RCC Cover 450x450x50 mm thick in PCC 1:2:4 type B1 using 20 mm graded stone aggregrate with 8mm dia TMT bars 3 nos both ways with 12 mm dia round handle complete all as specified and directed.