GE I R AND D/CHD-117/2025-26 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 and 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

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

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 for 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 for 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 in replacement 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 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 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 mtr, 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 mtr 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 directed.

Earthing complete all shown as electrical plate No -03 of MES Sch part -I as specified with testing and as directed including the following complete all as specified and directed :- (i) Galvanised steel earth plate of size 60x60cmx6mm thick buried directly in ground vertically to a depth not less than 2.25 mtr below ground level with top edge of earth plate at a depth not less than 1.50 metres below ground level.(ii) Earth plate surrounded by and packed with charcoal and common salt in alternative layers ( n.exc 15 cms 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 mtr shall be measured and paid for separately under relevant items of Sch 'A'.

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, 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, 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 for energy saving & environmentally friendly long life LED street light 60 watt made up of pressure die cast housing with toughened glass and individual high power LEDs with secondary optics, IP66 protection, impact resistance of IK07 & 10 KV external SPD and electronic driver of 60W LED 5700K complete all as specified and directed. Makes: Orient Cat part No LSFS-060-C,/Crompton catpart No : LSTP-60-CDL/Havells ENDURAOMNIPLUSSL60WLED757SASYTOPC/Halonix HLSLD-16-60-CWL

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.

SANJEEV ENTERPRISES (BID ID -3503280)

Bharat Enterprises (BID ID -3502508)

M/S BALWINDER SINGH (BID ID -3502330)

LA ENTERPRISES (BID ID -3508916)