SPECIAL REPAIR TO EARTHING INFRASTRUCTURE (PHASE-II) AT AF STATION MADH ISLAND UNDER GE AF THANE

M&L for Supply install testing and commissioning of 17.2 mm Dia x 6000 mm Long (made from 2 Nos. of 3000 mm length duly coupled with Brass Coupler ) 250 micron Copper Bonded MS (Mild Steel Solid Rod) of Low Carbon Steel, One Side Threaded Rod with Brass Coupler of Hexagonal Type (not knurling type). The Earthing Rod shall be Factory made of 75 mm Casting made from Marconite - Conductive Concrete aggrecate (0.001 Ohm) & Cement of Ratio of 2:1 (2 Part Marconite & 1 Part Cement). One Earth Rods shall will be provided with either Welded T Clamp of Copper Bonded Strip or SS Strip Clamp or Certified Brass/SS U Bolt Clamp suitable for 25 x 6 mm Copper Strip Termination. The Pre Cast Rod shall be inserted in 100 mm Dia Augered / Bored Hole made with Augur or Compressor Boring Machine at site of/FOR 5800 mm length or length as per site requirement for Bore Hole & Back filled with good quality soil after removing Stones, Pebbles & Crushed Stone as back fill complete all as specified and directed.as per following Notes : (a) Certificate of Copper Bonded Solid MS Rod shall be provided before making casting at factory. (b) Factory Acceptance Test (FAT) Certificate of Marconite (Carbon International Limited) shall be provided by contractor for authencity of Marconite. The Contractor shall also submit the certificate of 0.001 Ohm of Marconite Granule & then start the work of casting. The earth Pit / Grid calculation shall be carried as per BS-7430. The conductive concrete shall be manufaturered as per IEC-62561 & Test Certificate shall be provided by EPC.

Description for Srl Item No 1.00 Contd/- (c) Contractor shall submit sample type test report issued by CPRI for more than 12KA/1 Sec. for Marconite Casting Rod (d) Factory Aceeptance Testing of Marconite Casting shall be carried in presence of Client/Representative & Report shall be submitted. (e) All Hardware will be of SS316L grade. TC shall be provided along with supplies (f) Contractor shall provide `working drawings' as per site condition & get approval from accepting officer before procurement & starting the work at site.(g) Method Statement for carrying the site activity shall be provided by client (h) Contractor shall make `AS BUILT' Drawings on Autocad & shall submit to client in Hard Copies & Soft Format for Future Reference.(j) The work will be paid as per site measurement & qty can be changed as per site condition (k) It is required to deliver desired Grid Value less than 01 Ohm of Earthing Grid, contractor can verify soil resistivity by wenner 4 Point Method before starting of work & then carry site work.In event if desired Grid Value is not achieved then Contractor will have to carry extra earthing (free of Cost ) & Connect to the grid at free of cost. (l) Earth Strip for Interconnecting Earth Pits & Earth Pits to test points will be laid. The Earth Strip will be laid in excavated Trench.(m) Contrcator shall carry site survey with client to undestand the underground utilities like HT Cables, LT Cables, Data Cables, Water Pipe Lines & Other Utilities & then plan the site activities.(n) Contractor must have valid Electrical Contracting Licence of own to participate the Tender (o) All Workmen shall be provided with Safety Shoes, Hand Gloves, Goggles, Helmets.

Description for Srl Item No 1.00 Contd/- (p) Site team i.e. Workmen & Supervisors shall be covered under ESIC & PF before starting the work. The Worker's ESIC No. & EPFO No. shall be provided before starting of the work to safe guard the client from any accidental liablity.(q) Contractor must have min 10 years Experience of professional Earthing solutions

M&L for Supply install testing and commissioning of 25 x 6 mm Copper Strip in Excavated Trench. The Rate of Strip donot include brazing/Jointing of the Strip & Excataion of Soil. However Connection with earth Pit is included in above. The EPC Agency must see that joints shall be as low as possible. The Scope includes supply of PVC Pipe of 40mm Dia at the Building entry complete all as specified and directed.

Excavation of Soil in Trench Size of 400 x 400 mm for laying Copper Strip & back Filling the same after removing stones,pebbles etc complete all as specified and directed.of the following :-

Hard Rock

Murum

Soft Soil

Supply & Laying of Good quality of Garden Soil in excavated trench & bored Holes. The Soil should be free from Stone,Pebbles & small stones. complete all as specified and directed.

Supply & Making of Brass Square Tape Joint required for connection joint of Copper Strip of size 25 x 6 mm with Strip to Strip completely with all materials for all type of connection i.e. Stright Through, L Type, T Type, X Type complete all as specified and directed.

Supply & Fixing of Polymer Inspection Chamber suitable for above earthing after excavation of soil & using PCC made of Cement, metal stone & Sand.complete all as specified and directed.

Removal of Excess Soil after settlement of soil in excavated trenches, Boring Holes, Road Cutting etc. out of Site & dumping at government certified places as per Local Municipal MCGM Norms. The dumping the excess Soil & Wasteage materials at site may not be allowed complete all as specified and directed.

M&L for Cutting of Bitumen Road for Carrying Copper Strip for Connection & making it good surface finish after cutting of Size 400 x 400mm (W X H) complete all as specified and directed.

M&L for Supply install testing and commissioning of 4 Way Earth Testing Point made from 25 x 6 mm Copper Strip, SMC Insulator (2 Nos.) , Base Frame and 8/10mm SS316L Hardware complete all as specified and directed.

M&L for Supply install testing and commissioning of 6 Way Earth Testing Point made from 25 x 6 mm Copper Strip, SMC Insulator (2 Nos.) , Base Frame and 8/10mm SS316L Hardware complete all as specified and directed.

M&L for Testing of Complete Grid & Certification of earth resistance value complete all as specified and directed.

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