GE I R AND D/CHD-82/2024-25 REPAIR AND MAINT OF OLD LIGHTENING ARRESTORS AND CHEMICAL EARTHING OF TECH AREA, EARTHING IN MAGAZINES, DOMESTIC LABORATORIES AND OTHER EXPLOSIVE BUILDINGS AT TBRL RANGE RAMGARH

Amount

Dismantling/ taking down dislocated / de-shaped/loose earth continuity conductor or strip of or roof conductor in any position , any size complete including removal from work site or refixed at site complete all as specified and directed

Supply and fixing new aluminium strip 25 x 3.15 mm size as in roof / down conductor fixed with the help of porcelain insulator saddles and screws on roof/ wall complete all as specified and directed. Note :- 1. The distance between porcelain insulator will not be more than 60 cm. 2. The quoted rates shall be deemed to include cost of porcelain insulators ,T&P and labour required to work on roof top at lateral faces of Bldgs.

Refixing aluminium / GI / Copper strip off any size retrieved from item no. 1.00 above using new porcelain insulators , fixing screws, nuts / bolts / washers of the joints of the strip complete including cleaning / scratching the dust complete all as specified and directed . Note :- 1. The distance between porcelain insulator will not be more than 60 cm. 2. The quoted rates shall be deemed to include cost of porcelain insulators ,T&P and labour required to work on roof top at lateral faces of existing Bldgs.

Material and labour for air-termination, vertical type, single pointed rod made of 12 mm dia 300 mm long aluminium rod including necessary fixing arrangement with bolt, nuts and washers etc complete all as specified and directed

Material and labour for GI tubing 20 mm bore light grade ISI marked 1.5 metre long fixed vertically on roof top, duly embedded in plain cement concrete 1:2:4 type B-1 block of size 30cm x 30cm x 30 cm complete all as specified and directed

Material and labour for GI tubing 40 mm bore light grade ISI marked 1.5 metre long fixed vertically on roof top duly embedded in plain cement concrete 1:2:4 type B-1 block of size 30cm x 30cm x 30 cm complete all as specified and directed

Supply and fixing for GI pipe light grade of size 40 mm dia with all fittings laid in trenches/ floors (or) fixed to walls for protection of Copper/GI/Aluminium strips complete all as specified and directed

Supply and fixing for copper strip of size 20 x 3.15 mm buried in ground/fixed on wall complete with porcelain insulators, fixing screws, nuts, bolts and washers etc. complete all as specified and directed

Supply and fixing GI strip of size 25x4 mm buried in ground/fixed on wall complete with porcelain insulator, fixing screws, nuts, bolts and washers etc. complete all as specified and directed

Supply and fixing GI strip of size 32x6mm buried in ground/fixed on wall complete with porcelain insulator, fixing screws, nuts, bolts and washers etc. complete all as specified and directed

Material and labour for test point terminal block insulated from wall or external surface made of gun metal or phosphorus bronze of size 75x75x25 mm drilled and screwed including 3 Nos 8 mm dia 25 mm long hexagonal head screws complete all as specified and directed.

Material and labour in replacement of earth test point including GI/ copper strip/ clamp/ nut/bolt /washer/porcelain insulator complete all as specified and directed.

Material and labour for plain cement concrete block in 1:3:6, C1, on roof top comprising of required size at places where directed & laying, clamping the strip of any size securely on the block with suitable size GI bolt duly grouted, nut bolt washer etc complete all as specified and directed..

Material and labour for earthing pit chamber including replacement of cement concrete chamber of PCC (1:3:6) type C-2 using 40mm graded crushed stone aggregate the chamber shall be constructed one metre away from edge of earth pit with 50mm thick precast cover of cement concrete(1:2:4) type B-1 using 20mm graded crushed stone aggregate and MS angle iron 50x50x6mm frame including two coats of synthetic enamel painting over a coat of red oxide to exposed steel surfaces with suitable handle of 8 mm rod to lift the cover complete all as specified and directed.

Material and labour for display board of 60cmx30cm for earth pit made out of 2 mm thick MS sheet welded on angle iron legs 0.75 m long (02 nos) of size 40x40x6mm duly embedded in PCC block 1:2:4, type B-1, using graded crushed stone aggregate, of size 23x23x30cm fixed in ground including necessary earthwork. Display Board shall be painted with two coats of synthetic enamel paint over a coat of red oxide primer complete all as specified and directed . The following is to be written on the board:- a) Earth Pit No . b) Checked on c) Next due date.

Material and labour for earthing complete with galvanised steel earth plate electrode 600x600x6mm thick, buried directly in ground (earth pit not less than 2.25 m deep below ground level ) with top edge of the plate not less than 1.5 m below normal ground level, connected to galvanized iron wire of 4 mm dia earth lead by means of bolts, nuts ,washer and check nut of galvanized steel, earth wire protected by and including GI pipe 15 mm bore (light grade) and connected to main test point as directed and including concrete pit in PCC (1:3:6) type C1, pre cast RCC (1:1.5:3) type A1 cover slab of size 54x54x5cm reinforced with 8mm dia TMT Bars @ 150mm C/C both ways with one handle for lifting, made out of 8mm dia TMT bar embedded in precast cover slab, wire mesh funnel, 20mm bore GI Pipe (medium grade) for watering, charcoal and salt in alternative layers of 15 cm thick all around the electrode, including necessary excavation and earth work in any type of soil including taking out old UNSV earth plate electrode etc complete all as shown in electrical plate no-3 of SSR part -I and testing on complete all as specified and directed .. Note :- GI wire 4 mm beyond 7.5 m shall be measured and paid for separately under relevant items of Sch 'A'

Material and labour for chemical earthing using outer & inner pipe of copper as earthing electrodes and hydroscopic jelly back fill for good conductivity complete all as directed (dia of outer pipe shall be 65 mm, dia of inner pipe shall be 40 mm, length shall be 3 m, thickness of both pipes shall be 2.1 mm and made of minimum 95% copper metal) including copper earth strip of size 32x6 mm earth electrode to test point by means of brazing, bolts, nuts washer and check nut of brass, connected with in and including test point of bronze and 40mm GI pipe upto 7.5 m with copper testing point complete with PCC earth pit and 50 mm thick RCC pit cover using 20 mm graded crushed stone aggregate with TMT reinforcement bar 8 mm dia @ 150 mm centre to centre both ways, MS handle 10 mm dia made to shape with 50 x 50 x 6 mm angle iron frame duly painted, earth work in any type of soil connected to earthing test point and testing complete all as specified and m directed.

Material and labour for earthing complete all shown as electrical plate No -05 of MES Sch part -I as specified with testing and as directed including the following. (i) Copper earth plate of size 600 x 600 x 3.0 mm thick buried directly in ground vertically to a depth not less than 2.25 m below ground level with top edge of earth plate at a depth not less than 1.50 m below ground level (ii) Earth plate surrounded by and packed with charcoal and common salt in alternative layers ( n.exc 15 cm each layer). (iii) 32x6mm copper strip from earth plate to test point by means of brazing, bolts, nut washers and check nut of brass and connected with test point of bronze all as directed. (iv) 20mm bore, medium grade, GI pipe for watering including GI funnel and wire mesh. Pipe shall be provided vertically upto top level of earth pit and then taken horizontal to the earth pit. (v) 40 mm dia bore G. I. light grade pipe for protection of copper strip. (vi) Cement concrete chamber of PCC (1:3:6) type C-2 using 40mm graded crushed stone aggregate. The chamber shall be constructed one metre away from edge of earth pit. (vii) 50mm thick precast cover of cement concrete (1:2:4) type B-1 using 20mm graded crushed stone aggregate and MS angle iron 50x50x6mm frame including two coats of synthetic enamel painting over a coat of red oxide to exposed steel surfaces with suitable handle to lift the cover. (viii) Excavation in soft/loose soil, returning filling & removal of surplus soil to a distance of 50m as directed .Note :- Copper strip 32x6 mm at 7.5 m included in quoted rates.

Material and labour for earthing complete all shown as electrical plate no -03 of MES Sch part -I as specified with testing and as directed including the following.(i) Galvanised steel earth plate of size 60x60cmx6mm thick buried directly in ground vertically to a depth not less than 2.25 m below ground level with top edge of earth plate at a depth not less than 1.50 m below ground level.(ii) Earth plate surrounded by and packed with charcoal and common salt in alternative layers ( n.exc 15 cm each layer).(iii) 32x6mm G I strip from earth plate to test point including necessary GI bolts, nuts, check nut, washers & thimbles etc.(iv) 20mm bore, medium grade, GI pipe for watering including GI funnel and wire mesh. Pipe shall be provided vertically upto top level of earth pit and then taken horizontally to the earth pit. (v) 40 mm dia bore G. I. light grade pipe for protection of GI strip. (vi) Cement concrete chamber of PCC (1:3:6) type C-2 using 40mm graded crushed stone aggregate. The chamber shall be constructed one metre away from edge of earth pit. (vii) 50mm thick precast cover of cement concrete (1:2:4) type B-1 using 20mm graded crushed stone aggregate and MS angle iron 50x50x6mm frame including two coats of synthetic enamel painting over a coat of red oxide to exposed steel surfaces with suitable handle to lift the cover. (viii) Excavation in soft/loose soil, returning filling & removal of surplus soil to a distance of 50m as directed. Note :- GI strip 32x6mm beyond 7.5 m shall be measured and paid for separately under relevant items of Sch 'A'.

Supply and fixing for GI wire of size 4 mm buried in ground/fixed on wall complete with clamp insulator, fixing screws, nuts, bolts and washers etc complete all as specified and directed..

Supply and fixing in repair FLP - WP well glass fitting suitable for 100 watt LED, CMRI certified recommended for gas/ vapor group of IIA & IIIB, Zone 1 & 2 and IP 65 protection duly wired complete with necessary fixing arrangement and electric connection three core flexible copper conductor cable with suitable size and testing complete all as specified and directed.

Supply and fixing in repair FLP - WP well glass fitting suitable for 70/72 watt LED, CMRI certified recommended for gas/ vapor group of IIA & IIIB, Zone 1 & 2 and IP 65 protection duly wired complete with necessary fixing arrangement and electric connection three core flexible copper conductor cable with suitable size and testing complete all as specified and directed.

Supply and fixing in repair CRYSAL GLASS LED TUBELIGHT (double side connection) 18/20W ultra bright glass LED tube light with very high efficacy suitable for installation in existing flame proof fitting or T8 tube light with G13 lamp holders to give glare free light complete all as specified and directed

Supply and fixing in repair FLP WP rotary switch with cable terminal box LM-6 material single pole, on & off 16 Amp 250 VOLT complete all as specified and directed.

Supply and fixing in repair FLP-WP switch socket & metallic top plug combination in LM- 6 material rating 16 Amps, 250 V, 2 pole plus earth with plug including necessary fixing arrangement & all out going electric connection complete all as specified and directed.

Supply and fixing in repair FLP-WP Switch socket and metallic top plug combination in LM-6 material rating 25 Amp, 250 V, 2 pole plus earth with plug including necessary fixing arrangement and all out going electric connection complete all as specified and directed.

Supply and fixing in repair freedom plus LED Street light 35 W made up of Pressure die cast housing with toughed glass and individual high power LEDs with secondary optics, IP66 protection complete all as specified and directed.

Supply and fixing in repair outdoor LED highway/flood light luminaire JETA NEO 100 W energy saving, environmental friendly, long life, exclusive innovative die-cast aluminium IP 66 flood light, PF>0.9 suitable for highlighting architectural facade and general purpose lighting 100W 6000K complete all as specified and directed.

M/s Krishan Aggarwal (BID ID -3161192)

Singh Associates (BID ID -3163514)

Bharat Enterprises (BID ID -3167363)