NIT NO.22, ITEM NO.07 (2021-22)WW-II

Supply of 4 X 10 sq. mm PVC insulated & PVC sheathed/XLPE aluminum armored conductor 650/1100 voltage grade cable confirming to IS: 7098 (Part-I) 1988. Make: Grandlay/Gloster/DJB Approved.

Supplying and making end termination with brass compression gland and aluminum lugs for following size of PVC insulated and PVC sheathed / XLPE aluminum conductor cable of 1.1 KV grade as required.4 X 10 sq. mm (25 mm) (DSR 2018 Item No. 9.1.32)

Excavation of well near the entry point of main feeder cable of clarifier of about the size of 6X6’X18’ by hydraulic/manual means by taking all the precautions for the working personals and other structures nearby. This includes getting out the excavated earth and refilling after execution of the cable replacement work. This also includes dismantling of G.I. Pipe of the feeder cable from the bend in the bottom of the excavated well and making of new G.I. bend arrangement for fixing of new G.I. Pipe in the bend.

Arrangement of all safety equipment for the protection of staff to work at height of clarifier and in the deep well outside the clarifier such as Safety belts, safety shoes, gloves, helmets etc as per site requirement.

Arrangement of plates, balli, plankls, chain block, chains etc. and making arrangement of temporary support for walls in the excavated well, so that workers can work safely in the well.

Removal of old cable from the G.I. pipe, below the clarifier’s bottom surface with the help of heavy manual labour/Chain pulley block and cleaning of M.S. pipe with the help of rust removal chemicals and with water pressure.

Drawing of new 4 X 10 sq. mm PVC cable in the existing G.I. underground pipe, below the clarifier’s bottom surface with the help of Heavy manual labour/Chain pulley block etc in very cautionary manner to prevent the cable of any damage/harm.

Supplying and laying 6 SWG G.I. wire in double running(80mtrs. approx.) in the existing 100 mm dia. G.I. pipe below the clarifier structure along with new feeder cable for supporting the cable at the time of drawing and for earthing purpose, including connection/ termination with GI thimble etc. as required.

Providing and fixing of 100 mm Dia. G.I. pipe of 18 feet on the new G.I. bend in the excavated well and drawing of 4 X 10 sq. mm PVC cable & 6 SWG G.I. wire through it up to the ground level. This includes making connection of cable to the existing MCB box, installed outside the clarifier. The cable from the 100 mm dia. G.I. pipe upto the MCB box should be drawn through G.I. pipe of 50 mm dia.

Providing & Fixing of slipring with complete carbon bush set by using of nut bolts (as per existing). Making of connection of the cable on the new slipring and from slipring to the control panel of the flocculator and Bridge.

Earthing with copper earth plate 600 mm X 600 mm X 3 mm thick including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe of 2.7 metre long etc. with charcoal/ coke and salt as required. (DSR 2018 item no.5.6)

Supplying and laying 25 mm X 5 mm G.I strip at 0.50 metre below ground as strip earth electrode, including connection/terminating with G.I. nut, bolt, spring, washer etc. as required.(Jointing shall be done by overlapping and with 2 sets of G.I. nut bolt & spring washer spaced at 50mm). (DSR 2018 item no.5.9)

Supplying and fixing of 63 amp 6 way Bus Bar Chamber Box made out of 1.6mm thick Sheet steel duly painted with powder coating. Including making connections of 1 No. Incoming and 2no. outgoing cables to starters of the flocculator and Bridge.

SITC of modular/ combinable polycarbonate insulated outdoor type feeder panel housing,shock proof, weather proof, rust proof, UV resistant, halogen free, silicone free, corrosion proof, protection class: II safe, IP 65 according to IEC 61 439-2, IEC 60 999, DIN EN 50 262, DIN 43 880, IEC 60 529/ DIN VDE 0470 Teil 1 totally insulated, having internal embedded gasket with provision of cable entry through glands.The panel board should have following control panel MCB and accessories etc complete with connections & Interconnections etc as required. Note 1: For mounting of meters, indicating lights & push button only box with hinged door with triangular lid to be used. Note 2: For mounting of 5 HP DOL starter MS angle frame should be hot dipped galvanized and made out of MS angle of size 35 X 35 X 5 mm with all required material/arrangement as per site requirement. The Panel should consist of the followings:- (a) 18 A, TP, power contactor (MNX 18, L&T) - 1 No (b) 1 NO + 1 NC side mounting add - on aux. contact block (L&T) - 1 No. (c) 6 - 10 A thermal over load relay (L&T) - 1 No. (d) Single phasing preventer (L&T) - 1 No. (e) 16 A, FP, 10 kA, MCB (L&T) - 1 No (f) LED indicating lights red, Yellow,Blue & green (L&T) - 6nos. (g) Push Button with element (L&T) - 2 Nos. (h) 6 A SP MCB (L&T) - 1 No. (i) 32 A, 3 way open connector - 1 No. (j)Digital 3 phase VAF meter (L&T)- 1 No. (k) 50/ 5 A, 5 VA, 5.0 class current transformer (AE)- 3 No.

Laying of 4 X 10 sq. mm cable upto both the starter panels of flocculator and bridge with the help of M.S. Clamps under the Clarifier bridge structure by following all the precautions and safety manual as the work is to be carried out at height about 20 feet.

Testing and Commissioning of the complete system for satisfactory operation.

Dismantling of old damaged existing v-notch from the inner circumference of launder wall approx. 130 mtrs. by removing/cutting of all nut’s bolts with the help of gas cutter and taking out from the clarifier by manual labour

Fabrication and supply of M.S v-notch made out of M.S Sheet of size 200X1000X6mm thick around the inner periphery of approx. 130 mtrs. including cutting the v-notch on MS Sheet by using CNC machine/ laser machine as per sample.

Making the platform around the circumference of inner side of clarifier by using the all safety measures for fixing/ grouting the bolt and ”v” notches at height of 16 feet approx. from the pit of clarifier.

Grouting of foundation bolt in RCC structure around the launder Wall by using the heavy drill machine / manual labour including Cost of nut bolt & mechanical clamp etc. on circle / launder wall for fitting the v-notches etc.

Fixing of v-notches along the circumference of launder wall with the skilled manual labour by using the nuts, bolts, washer, tools and tackles etc.

Painting of complete v-notches by using the metal primer & black Bituminous anticorrosive paint .

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