REPAIR / REPLACEMENT OF EARTHING INFRASTRUCTURE INCLUDING TESTING OF EARTHING VALUE AND ALLIED WORKS AT BARRACKPORE AND REPAIR / REPLACEMENT TO CHEMICAL EARTHING SYSTEM FOR SENSITIVE EQUIPEMENT AND REPLACEMENT OF CONVENTIONAL EARTHING SYSTEM OF SUB S

Amount

Supply and installation of advance encapsulated compound based CPRI tested maintenance free, pipe-in-pipe technology upgraded (zinc & alloy coated), zinc coating ( 80-100) microns with pure zinc (99.9%) & alloy coating (200-250)microns. Earthing system conforming to IS-3034. The outer and inner pipe should be 76.2 mm & 41.9 mm, 3mtrs length, zinc coated with additional special alloy coating 300mm on the top side for additional corrosion protection of the terminal. The annular space between the pipes being filled up with COMPACT FILL(CF) (Crystalline Conductive Compound). The COMPACT FILL (CF) mixture which is machine pressed in the pipes should not disintegrate or collapse when outer pipe corrodes. The inner pipe should be extended with terminals for connectivity. The job includes digging the pits of dimension 60cm X 60cm up to depth of 3.1m and replace the soil with low resistive soil as approved by Engr-in-Charge, then make a bore of dia 200mm of depth 3.1m and refilling the same by conductolite back fill compound (Ground Enhancer), the BFC should be eco friendly it should not contain environmentally hazardous material / metal having RoHS Certification from NABL accredited lab. Good earth is to be arranged to fill the excavated pits by mixing the same with BFC 2 bags including FRP (Fiber reinforced plastic) light weight, high mechanical strength, chemical resistance with detachable easy locking lid of size 250mm X 250mm of thickness 2mm,and the earthing should be installed by applicator of the manufacturer / authorised dealer including taking down old existing unserviciable earthing complete all as specified and directed. Make- ASHLOK / MACKMET/CAPE

Supply and installation of advance encapsulated compound based CPRI tested maintenance free, pipe-in-pipe technology upgraded (zinc & alloy coated), ZINC COATED( 80-100)microns with pure Zinc (99.9%) & ALLOY COATING (200-250)microns. Earthing system confirming IS-3034. ASEEL -19 The outer and inner pipe should be of dia 76.2 mm & 41.9mm 2mtrs Length, Zinc coated with additional special alloy coating 300mm on the topside for additional corrosion protection of the terminal. The annular space between the pipes being filled up with COMPACT FILL (CF) (Crystalline Conductive Compound). The COMPACT FILL (CF) mixture which is machine pressed in the pipes should not disintegrate or collapse when outer pipe corrodes. The inner pipe should be extended with terminals for connectivity The job includes digging the pits of dimension 60cm X 60cm up to depth 2.1m and replace the soil with low resistive soil as approved by Engr-in-Charge, then make a bore of dia 200mm of depth 2.1m and refilling the same by Conductolite Back Fill compound (Ground Enhancer), the BFC should be eco friendly it should not contain environmentally hazardous material/metal having RoHS Certification from NABL accredited lab. Good earth is to be arranged to fill the excavated pits by mixing the same with BFC 1 bags (as per soil condition), including FRP (Fiber reinforced plastic) light weight, high mechanical strength, chemical resistance with detachable easy locking lid of size 250mm X 250mm of thickness 2mm, and the earthing should be installed by applicator of the manufacturer / authorised dealer including taking down old existing unserviciable earthing complete all as specified and directed. Make- ASHLOK / MACKMET/CAPE

Material and labour for earthing complete with copper earth plate electrode of size 600 x 600 x 3.15mm thick buried directly in ground with earth pit not less than 2.25 meter deep below ground level with top edge of plate not less than 1.5 meter below normal ground level connected to copper strip of size 20 x 3mm earth lead by means brazing after fixing of nuts, bolts, check nuts, washers of galvanised iron steel, protected by galvanized iron pipe 40mm bore (medium grade) all as directed including cement concrete (1:3:6) type C-1 earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 42 x 42 x 10cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh, 20 mm bore galvanized iron pipe (medium grade) for watering, earth testing point, charcoal or coke and salt in alternate layers with necessary earth work in soft/loose soil complete all as shown in electrical plate No 3 of SSR Part I including testing on completion including taking down old existing unserviciable earthing complete all as specified and directed. Note:- Strip upto 7.5m length including testing shall be included in quoted rates.

Material and labour for earthing complete with GI earth plate electrode of size 600 x 600 x 6 mm thick buried directly in ground with earth pit not less than 2.25 meter deep below ground level with top edge of plate not less than 1.5 meter below normal ground level connected to GI earth strip of size 32 x 6 mm earth lead by means of nuts, bolts, check nuts, washers of galvanised iron as steel, protected by galvanized iron pipe 40mm bore (medium grade) all as directed including cement concrete (1:3:6) type C-1 earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 42 x 42 x10cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh, 20 mm bore galvanized iron pipe (medium grade) for watering, charcoal or coke and salt in alternate layers with necessary earth work in soft/loose soil complete all as shown in electrical plate No 3 of SSR Part-I including testing on completion including taking down old existing unserviciable earthing complete all as specified and directed. Note:- GI strip upto 7.5m length including testing shall be included in quoted rates.

Material and labour for earthing complete with GI earth plate electrode of size 600 x 600 x 6 mm thick buried directly in ground with earth pit not less than 2.25 meter deep below ground level with top edge of plate not less than 1.5 meter below normal ground level connected to GI wire 4 mm dia earth lead by means of nuts, bolts, check nuts, washers of galvanised iron as steel, protected by galvanized iron pipe 15 mm bore (medium grade) all as directed including cement concrete (1:3:6) type C-1 earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 42 x 42 x10 cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh, 20 mm bore galvanized iron pipe (medium grade) for watering, earth testing point, charcoal or coke and salt in alternate layers with necessary earth work in soft/loose soil complete all as shown in electrical plate No 3 of SSR Part-I including testing on completion including taking down old existing unserviciable earthing complete all as specified and directed. Note:- GI wire upto 7.5m length including testing shall be included in quoted rates.

Material and labour for earthing continuity conductor or main earthing lead fixed to wall or recess or chases with 20 x 3 mm copper strip fixed on porcelin insulator at distance 45 cm including nut bolt drilling hole etc after taking down old unserviceable strip complete all as specified and directed. Note : Joining of copper strip shall be made by brazing after fixing of nuts & bolts.

Material and labour for galvanised iron strip of size 32 x 6mm buried in ground after taking down old unserviceable strip complete all as specified and directed. Note : Joining of GI strip shall be made by welding.

Material and labour for aluminium strip 25 x 3.15mm with saddles and fixing screws etc. for roof conductors and down conductors above ground after taking down old unserviceable strip complete all as specified and directed. Note : Joining of aluminium strip shall be made by brazing/soldering.

Material and labour 40mm dia galvanised steel tubes (light grade) with fittings, laid in trenches / wall for protection of underground earth strip when crossing the road / fixing on wall after taking down old unserviceable pipe complete all as specified and directed.

Material and labour for fabrication of display board for earth pit Nos, location and periodical test results for power circuit earthing, machinary earthing, lightening conductor earthing, made of GI sheet 4.0 mm thick, rectangular welding on 12 mm dia rod of minimum height from ground level 45 cm including fixing in PCC (1:2:4) type B1 (using 20mm graded stone aggregate) of size 20cm X 20cm X 10cm foundation to be carried out at different location dimension of board shall be 30 cm X 25 cm. The instruction shall be written black painted board in white letters not less than 2" size for all type of boards including taking down old existing unserviciable display board complete all as specified and directed. Note : (a) All necessary GI sheet, aluminium screws and PCC works etc shall be deemed included in the quoted rates. (b) The fabrication of contents on the screen printing should be collected before printing the board from Engineer-in-charge.

Material and labour for construction of earth pit made out of cement concrete (1:3:6) type C-1 (using 40mm graded stone aggregate) and cover slab made out of precast RCC (1:1.5:3) type A-1 (using 20mm graded stone aggregate) of size 42 x 42 x 10cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh including dismantling of old existing earth pit complete all as specified and directed .

Material and labour for painting of earth pit chamber by two coats of synthetic enamel paint after cleaning earth pit properly with iron wire brush and indicating board as per colour code complete all as specified and directed.

Taking down of damaged GI / copper / aluminium strip including air termination of any specification and refixing the GI / copper / aluminium strip including air termination after repair in existing location complete all as specified and directed.

Material and labour for air termination single pointed copper rod,12mm dia and 300mm long including necessary fixing arrangment using clamps,nuts and nuts including taking down old unserviceable air termination rod complete all as specified and directed.

Material and labour for test point termination box made of gun metal or phosphorus bronze size 75x75x25 mm drilled and screwed including 3 Nos, 8 mm dia, 25mm long hexagonal heads screw for lighting conductors including taking down old existing unserviciable termination box complete all as specified and directed.

Supply and fix in repair porcelain insulator for supporting or passing or copper strip from roof / wall including necessary nuts and bolts complete all as specified and directed.

Material and labour for excavating for earth pit of size 45 cm x 45 cm x 60 cm into the adjacent of the high resistance value GI earth pit, make a bore of dia 200 mm to a depth of 2 mtr, providing GI strip of size 32x6mm with the protection of 40 mm dia GI pipe (light grade) of 2 mtr length including necessary filling of Back Fill Compound ( 1 bag of 25 Kg) into the hole around the protection pipe and connect the GI pipe with 32 x 6 mm GI strip including connection with the existing strip by proper welding/soldering including returning filling complete all as specified and directed. Note:Joints at both ends of GI pipe and GI strip should be welded .

Material and labour for welding to GI Earth strip joints including replacement of existing nuts bolts joints complete all as specified and directed.

Material and labour for soldering/brazing to the copper strip joints in replacement of existing nuts bolts joints complete all as specified and directed.

Material and labour for refixing / re-alignment of existing air termination rod alongwith necessary clamping and PVC sleeve of any specification / position complete all as specified and directed. Note:- If PCC required at site for errection of the air termination shall be measured and paid under resp[ective item.

Material and labour for PCC (1:3:6) type C-2 (using 40 mm grade stone aggregate) as in foundation and mass concrete complete all as specified and directed

Materials and labour for 40mm dia high density polyethylene pipes (HDPE) of pressure rating 6 kgf/cm2 fixed complete to walls, ceilings or in floors etc including taking down old unserviciable existing pipe complete all as specified and directed.

Material and labour for repair of LT feeder pillar box complete including dismantling of burnt-out cable connections, bus-bars, MCCBs etc and preperation of external surfaces and apllying one coat of synthetic enamel paint, refixing of bus-bars, replacement of epoxy cast busbar insulators, serviceable MCCBs, all cable connection from busbar to terminals at both ends etc. including patch repair with electric welding for replacement of hinges, refixing of broken doors, replacement of locking arrangement with sliding bolts incl PCC for reconstruction of foundation/coping etc. complete all as specified and directed. NOTE : Cable connector required for replacement & required PCC for reconstruction of foundation / coping will be measured and paid separately under respective items.

Supply only cable connector of length 0.5 m, made out of 25sqmm multi-stranded copper conductor single core PVC inner sheathed un-armoured cable including copper lugs, copper nut bolts etc.complete all as specified and directed.

Supply only cable connector of length 0.5 m, made out of 35sqmm multi-stranded copper conductor single core PVC inner sheathed un-armoured cable including copper lugs, copper nut bolts etc. complete all as specified and directed.

Supply only cable connector of length 0.5 m, made out of 16sqmm multi-stranded copper conductor single core PVC inner sheathed un-armoured cable including copper lugs, copper nut bolts etc.complete all as specified and directed.

P.J. AND CO.

NC BOSE AND CO

JADAV CONSTRUCTION

BISWAS CONSTRUCTION

ONIEL SALES

BHAUMIK CONSTRUCTION