Cable laying testing commissioning of earth pit PVC insulated unarmoured cable and repairing of substation cable trench supports at various locations in the substation at TIFR Colaba Mumbai 400 005

Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and for all lift, as directed by Engineer-in-charge. : All kinds of soil tentative size 1.5 M x 1 M x 140 M LENGTH.

Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 and for all lift. ( less 50 mm dia 60 nos of cables)

Extra for excavating trenches for pipes, cables, etc. in ordinary/hard rock exceeding 1.5 m in depth but not exceeding 3 m. (Rate is over corresponding basic item for depth upto 1.5 metre) Ordinary rock : Pipes, cables etc. exceeding 80 mm dia but not exceeding 450 mm dia (trench size tentaive 1.5 m X 15 m X 2.5 depth) ordinary rock

Demolishing R.C.C. work manually/ by mechanical means including stacking of steel bars and disposal of unserviceable material within 50 metres lead as per direction of Engineer - in- charge

Dismantling / Demolishing of Concrete floor manually / by mechanical (Breaker machine, etc.) means including disposal of surplus excavated soil to facilitate removal/laying of cable and means including disposal of surplus excavated soil and unserviceable material to within 50-meterlead as per direction of Engineer-in-Charge. Note: Nominal concrete 1:4:8 or leaner mix (i/c equivalent design mix)

Taking out existing CC interlocking paver / Saber blocks from footpath/ central verge, including removal of rubbish etc., disposal of unserviceable material to the dumping ground, for which payment shall be made including and stacking of serviceable material within 50-meterlead as per direction of Engineer-in-Charge. (To facilitate removal/laying of cable)

Laying old cement concrete interlocking paver /Saber blocks of any design/ shape laid in required line, level, curvature, colour and pattern overhand including 50 mm thick compacted bed of coarse sand, filling the joints with fine sand etc. all complete as per the direction of Engineer-in-charge. (Old CC paver blocks shall be supplied by the department free of cost)

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level :1:2:4 (1 cement : 2 coarse sand (zoneIII) : 4 graded stone aggregate 20 mm nominal size) M-15 grade of Concrete

Demolishing brick work manually/ by mechanical and disposal of surplus excavated soil and unserviceable material to within 50-meter lead as per direction of Engineer-in-Charge. In cement mortar

Providing and laying Non Pressure NP-3 class (Medium duty) R.C.C. pipes including collars/spigot jointed with stiff mixture of cement mortar in the proportion of 1:2 (1 cement : 2 fine sand) including testing of joints etc. complete : 450 mm dia RCC pipes

Brick work with common burnt clay F.P.S. (non-modular) bricks of class designation 7.5 in foundation and plinth in: Cement mortar 1:4 (1 cement: 4 coarse sand) (Note: Brick wall thickness is 20 cm)

CEMENT PLASTER WITH A FLOATING COAT OF NEAT CEMENT : 12 mm cement plaster finished with a floating coat of neat cement of mix :1 :4 Cement mortor

Earth Cable Exit Chamber with cover Making Work (Section 2)

Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 2.5 m, as directed by Engineer-incharge. All kinds of soil

Providing soling using 80 mm size trap metal in 15 cm. layer including filling voids with Crushed sand/grit, ramming, watering etc. complete.

Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming compacting and watering to achieve required compaction, lead up to 500 m and lift upto 1.5 m

Providing and laying in position site batched design mix cement concrete for reinforced cement concrete work; using coarse aggregate and fine aggregate derived from natural sources, portland pozzolana / ordinary portland /portland Slag cement, admixtures in recommended proportions as per iS: 9103 to accelerate / retard setting of concrete, to improve durability and workability without impairing strength; including pumping of concrete to site of laying, curing, carriage for all leads; but excluding the cost of centering, shuttering, finishing and reinforcement as per direction of the engineer-in-charge; for the following grades of concrete. Note: Extra cement up to 10% of the minimum specified cement content in design mix shall be payable separately. in case the cement content in design mix is more than 110% of the specified minimum cement content, the contractor shall have discretion to either re-design the mix or bear the cost of extra cement. Concrete of M30 grade with minimum cement content of 350 kg /cum

Providing and laying weep holes pipes of 150 mm diameter PVC pipes as per drawing for abutment returns, return walls etc. Complete.

Centering and shuttering including strutting, propping etc. and removal of form for Walls (any thickness) including attached pilasters, butteresses, plinth and string courses etc.

75 mm thick back filling for pitching including supplying of required materials and consolidation etc. complete with : Moorum

75 mm thick back filling for pitching including supplying of required materials and consolidation etc. complete with : Stone aggregate 20 mm nominal size

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level. Thermo - echanically Treated bars of grade Fe-500D Grade of Approved makes from TATA,JSW,JSPL,RINL & SAIL or equivalent approved.

Deployment of belder for bailing / renmoval of Water)

Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by Engineer-in charge, beyond 500 m initial lead, for all leads including all lifts involved. Note: Please refer to the chamber’s tentative dimensions, concrete ratio, steel bar size, etc., as mentioned in the drawing. The dimensions may change subject to site clearance, and before commencing the work, proper approval shall be obtained from the Engineer-in-Charge.

ELECTRICAL WORK

Removing/De-terminating (de-termination includes the removal of the cable gland) earthing and neutral conductor lugs, and PVC/XLPE insulated, PVC-sheathed armoured cable lugs from electrical equipment/existing earth pit lugs/existing terminated cables of the following sizes.

(3.5 C/4 C) X 300 sq. mm

1 C x 300 sq. mm

Removing the existing laid earth conductors (PVC insulated cable / earth flat copper bare / insulated bars) of the following sizes from the existing excavated trenches, cable trays, transformer yard jelly area, and wall areas (all levels). The cost shall include all incidental civil works and any other tasks required to complete the job.(Any scaffolding, if required)

Copper Flat Bar(Width: Minimum 25 mm to maximum 50 and Thickness 3 mm to 6 mm)

1 C x (185 Sq.mm to 300 Sq. mm) Copper Un armoured (Earthing Conductor) Note:After removing the cables/earth bars, the contractor shall Wrapping the cables/Flat properly,shift and keep them in the electrical store/cable yard or at a location directed by the Engineer-in-Charge (within the TIFR premises).

Supplying and installing following size of perforated Hot Dipped Galvanised Iron cable tray (Galvanisation thickness not less than 50 microns) with perforation not more than 17.5%, in convenient sections, joined with connectors, suspended from the ceiling /fixing on wall with MS Fabricated 'L' Suspenders(Supports) size(35mm*35mm*5mm).Note: The cost shall include incidental civil work, fabrication (cutting, welding, etc.) of the tray, MS ‘L’ channel supports, bolts and nuts, two-coat painting (with one coat of red oxide primer), and all required tasks for completing the job.SIZE: 300 mm width X 50 mm depth X 1.6 mm thickness. Note: While laying if any clamps are required or any holes are required in walls/slabs etc. then rates should be included in the laying. The holes in walls/slabs are to be done through special slab cutting machine only.

Laying,testing and Commissioning of PVC/ XLPE insulated and PVC sheathed , Armoured / Un-armoured power of 1.1 kV grade following sizes direct in ground in existing excavated trenches, cable trays, wall areas,While laying the cable in the ground, sand cushioning (bedding) and physical protection covers (typically bricks) shall be used to complete the laying work.Note: Cable laying will involve multiple runs as per the direction of the Engineer-in-Charge.cable identification tags (to be tied on the cable every 8 meters, not made of plastic; tags shall have good embossed black letters on a yellow background and be unbreakably stable), and incidental civil works, fixing of clamps, and any other tasks required for completing the job.

4C x 70 Sq.mm Al. Ar. XLPE insulated PVC sheathed cable

4C x 185 Sq.mm Al. Ar. XLPE insulated PVC sheathed cable

4C x 300 Sq.mm Al. Ar. XLPE insulated PVC sheathed cable

1 C X 300 Sq.mm Unarmoured PVC insulated Copper cable

Supply, Glanding and End Termination of PVC/XLPE insulated and PVC sheathed armoured Aluminium Conductor cable through heavy duty brass/SS gland(Double Compression), and heavy-duty long barrel Aluminium lugs complete with cable size marker & dressing of cable in trenches/Adapter Box and etc. Note: The cost shall include making holes on the gland plate, crimping paste, colour heat-shrinkable sleeves, and all other tasks required to complete the job.

4C X 70 Sq.mm Aluminium Armoured LT Cable

4C X 185 Sq.mm Aluminium Armoured LT Cable

3.5 C / 4 C X 300 Sq.mm Aluminium Armoured LT Cable

Supply and termination of Heavy-duty Copper solder / brazing type lugs. (The solder/brazing of copper lugs to be done properly) in the following size Note: (Cost to be including of heavy duty Copper solder / brazing type lugs etc.) After termination, green colour heat-shrinkable sleeves shall be used on the barrel area of the lug.(Don't use any Insulation tape at crimping area). 1C X 300 Sq.mm copper lugs

Termination of Heavy-duty Copper solder / brazing type lugs. (The solder/brazing of copper lugs to be done properly) in the following size NOTE :Only copper lugs will be provided by the Electrical Store of Technical Services. All other materials required for termination shall be borne by the contractor. After termination, green colour heat-shrinkable sleeves shall be used on the barrel area of the lug. (Don't use any Insulation tape at crimping area) 1C X 300 Sq.mm copper lugs

Supply and fixing the cable route marker with 10 cm X 10 cm X 5 mm thick G.I. plate with inscription there on, bolted /welded to 35 mm X 35 mm X 6 mm angle iron, 60 cm long & above and fixing the same in ground as required.

MECHANICAL WORK

Providing labour, consumable materials, and machinery/equipment for structural steel works at all levels, including cutting, fabricating, welding, erecting, and fixing in position for repairing the concrete cable trench supports, along with applying two coats of paint with an approved steel primer (one coat of primer and one finishing coat). Note: Welding weights, connection bolts, and nuts shall not be measured for payment, and their cost shall be deemed to be included in the rate.Cost to be include painting and Fasterners,bolt,nuts and etc.

Supply of MS(Plain/chequered) plates,‘L’ channel, flat channel, ‘C’ channel, etc., as per site requirements, including one coat of steel primer and two coats of colour painting of approved make. Note: Welding weights, connection bolts, and nuts shall not be measured for payment, and their cost shall be deemed to be included in the rate.

Laying / installation / Fixing / termination of Copper stripes/wire on Insulator/Saddles on wall/ground with Required Support at different substation location max. Height of the fixing location shell be up to 1 m from the floor level. (Size of the earth strip is 500mm X50mmx 6 mm).Note: Before fixing the copper bus strip, 12 mm diameter holes shall be made in the bus bar, and the contractor shall provide 12 mm bolts and nuts. Each bus bar shall have 8 holes. The bolts, nuts, spring washers, and flat washers shall be made of SS material.

Applying priming coat with ready mixed red oxide zinc chromate primer of approved brand and manufacturer on iron/steel works, using a spray machine, including all labour, material, and machinery/equipment as required, complete. NOTE: The cost shall be included for cleaning the surface area,handling (taking out from location to the painting area, and after painting, fixing it back in the existing position or as directed by the Engineer-in-Charge) of the MS chequered plate.

Providing and applying two coats of synthetic enamel paint of approved brand and manufacture of required colour/shade to give an even finish on already primed steel work, including all labour, materials, and scaffolding/access complete. (Painting shall be done only using a spray machine).NOTE: The cost shall be included for handling (taking out from location to the painting area, and after painting, fixing it back in the existing position or as directed by the Engineer-in-Charge) of the MS chequered plate.

Repairing of Concrete Cable Trench Side Walls/Surface preparation of existing concrete for repairs, including cleaning , removal of all dust/loose particles/surplus materials.(Note: The cost shall include the required incidental civil works for finishing the corners/edges of the concrete trenches).