Construction of chimney as per CPCB guidelines along with associated electrical work for Malda Regional Office cum Laboratory Complex of WBPCB at Village - Abhirampur, P.O- Mokdampur, P.S - English Bazar, Dist - Malda, Pin - 732103

Amount

Laying and Jointing PVC Pipe. Heading

Exhaust system including supply and installation of required size MS Black Pipe (Class B) complete with necessary bends, flanges, and fittings. MS vertical exhaust pipe of required size and thickness (ID: 80 mm, OD: 88.9 mm) complete with bends and flanges. Thermal insulation on both horizontal and vertical sections using mineral wool of required thickness, covered with wire mesh and aluminium cladding of appropriate gauge. MS self-supporting structure for exhaust piping, aluminium cladding of residential silencers, flexible bellows, and provision of lightning arrestors, considering a single exhaust stack.

Supply and installation of 3½ core, 35 sqmm, XLPE insulated, 1.1 kV grade, armoured aluminium cable with necessary supports, laid in ground including excavation of soil and backfilling the trench with brick protection, or laid in ready trench or on wall surface with necessary saddling or wall chasing, and restoring any surface damages to original condition as required.

Making Termination of 1.1KV Grade cables as above, including supplying of all termination materials, compression type brass cable glands, sockets ( AL sockets and G.I bolts, nuts for AL cables), Bolts, nuts.

Extra for providing masonry enclosure on the top of the earth electrode of overall size 86.36 cm x 86.36 cm x 46 cm deep (below Ground level) complete with cemented brick work(1:6) of 25 cm width duly plastered with cement morter (inside) CI hinged inspection cover of size 36.56 cm x 35.56 cm with locking arrangement, GI reducer including drilling of 46 nos. 12 mm dia holes on the GI pipe.

Maintenance-free Chemical Earthing with dual pipe flat Technology, 80 mm dia. 3 meters long with a chemical Compound. Model: G803

Supplying and fixing vertical run of 25 mm × 6 mm GI flat on wall using proper saddles spaced not more than 2'-0" (0.6 m) apart, including making bolted connections with air terminals and mending all damages, complete in all respects and inclusive of hiring charges for scaffolding as required.

Supplying and fixing 25 x 6 mm GI flat from earth installation to test point partly 30 cm below ground level and partly above ground on wall including supplying and fixing 40 mm bore GI protection pipe (Class-B) filled with compound and making connection at terminal ends with nuts, bolts and washers etc and mending good the damages.

Fixing only exhaust fan after making hole in wall and making good damages and smooth cement finish etc. as practicable as possible and providing necy. length of PVC insulated wire and making connection for exhaust of following diameter: 12 inch (300 mm Dia)

Supply & Fixing louver shutter on wall with necy. bolts & nuts (6 mm dia x 62 mm long) (a)For Al 30 cm Exhaust fan (12")

Supplying of 12 inch (300 mm) EPC make industrial heavy-duty exhaust fan, suitable for operation at both 220V and 415V, with dual speed options of 1420 RPM and 920 RPM, power consumption of 48W and 80W respectively, air delivery capacity of 4000 CFM / 6800 m³ per hour, and a noise level of approximately 50 dB, complete in all respects as specified.

Distribution wiring using 2 × 22/0.3 mm (1.5 sqmm) single core stranded 'FR' PVC insulated and unsheathed copper wire (for phase and neutral) and 1 × 22/0.3 mm as earth continuity conductor (ECC) of brand approved by EIC, drawn through 19 mm bore, 3 mm thick polythene pipe complete with all necessary accessories embedded in wall, for light/fan/call bell points. Wiring shall be connected to Piano key type switch (Anchor make) fixed on sheet metal switch board (16 SWG) with 3 mm thick bakelite/perspex top cover (matching wall colour), flush-mounted in wall, including making good all damages to original finish. (i) Average run: 6 meters.

NANDAN ELECTRIC (BID ID -6833904)

BIECTECH ELECTRICALS PRIVATE LIMITED (BID ID -6852052)