SPECIAL REPAIR/REPLACEMENT OF CONVENTIONAL EARTHING WITH CHEMICAL EARTHING AND REPLACEMENT OF UG CABLE AT AF STN DARBHANGA UNDER GE (AF) BIHTA

Amount

Excavation in trenches n.exc 1.5 mtr wide and n.exc 1.5 mtr deep in loose / soft soil and getting out for under ground cable / erection of poles, stays etc complete all as specified and as directed.

Returning, filling in soil including spreading, leveling, watering and well ramming in layers n.exc 25 cm thick complete all as specified and as directed

Removing of excavated material (soil) not exc 50 mtr away and depositing where directed at a level n, exc 1.5 mtr above the starting point complete all as specified and as directed.

Supplying and laying pulverized fuel Ash-lime bricks (Fly ash bricks - non modular size), laid flat perpendicular to the cable adjoining each other as in protection to UG cables, complete all as specified and directed.

M&L for fine sand free from sharp material as in filling in trenches for cable protection incl necessary punning and consolidation as reqd, complete all as specified and directed. (Note: Depth of sand shall be measured after punning).

Supply, Laying, jointing and testing of cable XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable, heavy duty, with aluminium conductor, 1100 Volts grade, complete all as specified and directed for the following size of cables: -. a) 70 Sqmm 3.5 core

b) 35 Sqmm 3.5 core

c) 10 sqmm 4 core Note:- (Excavation, earth work, brick protection sand cushioning and GI pipe etc shall be measured & paid for separately)

Taking out old unservuceable cable of any size from trenches/poles/drains/duct etc of any make complete all as specified and as directed.

Supply and fixing Tripod Earthing (3 Set earthing inter connected to 1 set) maintenance free Earthing Solutions comprising with the following: - - Supply and fixing after digging bore of suitable size the CPRI tested and UL certified maintenance free earthing system having a set of copper bonded Earth Rod of 3 meter length, 17.2 mm dia made of high tensile low steel circular rods, molecularly bonded with 99.90% electrolytic grade copper on outer surface (minimum copper bonding thickness - 250 microns) with exothermally jointed copper bus bar of 200X25X6mm for long lasting and connection. Earth Copper bonded rod & exothermically jointed bus bar should be CPRI tested on 25KA fault current complete all as specified and directed by engg-in-charge for complete connections. - Qty 3 Nos. - Earth Copper bonded Electrode should be tested by CPRI - Current carrying capacity of Earth Copper bonded Electrode is 25KA/Sec. - Marconite material in granular form should be used.

Item 11.00 Contd..... - Supply and filling of carbon based, eco friendly earth enhancing compound of RHOS tested compound tested by NABL accredited Lab in compliance to IEC 62561-7 and having passed leaching, sulphur, corrosion resistivity test as per IEC 62561-7 an international standard for earth enhancement compound in compliance to IEC 62561-7 with a resistivity < 0.12 ohm-m, 25 kg, Qty- 3 Nos. - Earth enhancing compound shall be free from corrosion, it shall be carbon based material and shall be free from bentonite and other hazardous substances. The product does not dissolve, deteriorate or leach out of time. It shall be highly conductive and improves earth's absorbing power and humidity retention capability, It shall be eco-friendly and chemically inert to sub soil. - Supply and fixing plastic Earth pit Cover of size 247mm x 338mm x 210mm having load bearing capacity of 8 Ton and complying IEC 62561-5. Qty - 3 Nos. Note - On testing after completion of job, if desired earth resistence is not found i.e. below 1.00 Ohms, the earthing shall be redone at no extra cost to the Govt.

Supply & fix copper strip 20mmx3.15mm with saddles and fixing screws for roof conductors and down conductors above ground to extend earthing lead from pit to building wall, complete all as specified and as directed.

M&L testpoint terminal block made of gun metal or phosphorus bronze solid type size 75x75x25 mm drilled and screwed including 3Nos. 8mm dia 25 mm long hex. Head screw, complete all as specified and as directed.

M&L for GI pipe light grade with all fittings, laid in trenches, walls and floors etc, 50 mm bore, ISI marked, complete all as specified and as directed.

B.K. ROY & SONS

SHIV SHAKTI TRADERS

Bharti Electrical Point

M/S NARAYAN ENTERPRISE

SANJAY CONSTRUCTION COMPANY

JHA CONSTRUCTION AND CO