Proper earthing arrangements of different feeders of 11KV and 3.3KV O/H line at Gidi-C Colliery. Maintenance of 11KV/3.3KV OH line and supply and fixing of danger boards on poles of Gidi-C and Gidi A colliery under Argada Area.

Amount

Part-A:- Proper earthing arrangements of different feeders of 11KV and 3.3KV O/H line at Gidi-C Colliery Supplying and laying 25 mm X 5 mm G.I strip at 0.50 metre belowground as strip earth electrode, including connection/ terminatingwith G.I. nut, bolt, spring, washer etc. as required. (Jointing shallbe done by overlapping and with 2 sets of G.I. nut bolt & spring washer spaced at 50mm)

Supply and erection of approved make safe earthing electrode consisting pipe-inpipe technology as per IS 3043-1987 made of corrosion free G.I. pipes with constant ohmic value surrounded by highly conductive compound with high charge dissipation suitable for effective and maintenance free earthing in earth pit of minimum bore dia. 150mm size, as mentioned below : With 2 metre pipe of 80mm outer dia., 40mm inner dia and 14mm terminal dia. In soft/hard rock/marshy soil with 25 kgs. (one bag) back filling bentonite compound UL listed and confirm to relevant International /Indian standards around electrode upto ground level

Supplying of channel iron 75 mm X 40 mm X 6 mm (7.14 kg permetre) cross arm for 4 wire over head line complete with clamps,bolts, nuts and washer etc including drilling of holes for insulatorpins etc (as per drawing) and painting with primer and finishedpaint as required .

Providing and fixing G.I. tape 20 mm X 3 mm thick on parapet or surface of wall for lightning conductor complete as required.

Supplying and erection of 11 KV pin insulator complete with largesteel head G.I. pin, nuts, washers etc. as required.

Supplying and erection of 11 KV disc insulator for 11 KV overhead lines with galvanised insulator fittings, ball and socket typeand complete with galvanised strain clamps, bolts, nuts, washers etc. as required.

D’ iron clamp

Supply of G.I. wire ( A.11 KV O/H line continues earthing 54 SPN X 50 Mtr X 116 KG/PKMTR X 1.05=328.86 Kg B.11 KV O/H line continues earthing 57 SPN X 50 Mtr X 116 KG/PKMTR X 1.05=347.13 Kg

Erection of G.I. Wire No. 8 SWG including binding etc. as required

Part-B:- (Maintenance of 11KV/3.3KV OH line and supply and fixing of danger boards on poles of Gidi-C & Gidi-A Collieries ) Supply & Fixing of Galvanized Steel Barbed Wire. For Gidi-C Colliery:- 260 Kg For Gidi-A Colliery:- 270 Kg.

Supply & Fixing of Mild Steel Sheet Danger plates, Radium type For Gidi-C Colliery:- 130 Nos. For Gidi-A Colliery:- 135 Nos.

Supply & Fixing of G.I. nuts and through bolts with washer For Gidi-C Colliery:- 780 Nos. For Gidi-A Colliery:- 810 Nos.

Supply & Fixing of D" Iron Clamp For Gidi-C Colliery:- 650 Nos. For Gidi-A Colliery:- 675 Nos.

Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means over areas (exceeding 30 cm in depth, 1.5 m inwidth as well as 10 sqm on plan) including disposal of excavatedearth, lead upto 1.5 m, disposed earth to be levelledand neatly dressed. 2.8.1 Ordinary rock For Gidi-C Colliery:- 0.75 Mtr X 0.75 Mtr X 0.25 Mtr X 60 Nos=8.43 CUM. For Gidi-A Colliery:- 0.75 Mtr X 0.75 Mtr X 0.25 Mtr X 30 Nos=4.21 CUM.

Providing and laying in position cement concrete of specified grade excludingthe cost of centering and shuttering - All work up to plinth level :1:4:8 (1 Cement : 4 coarse sand : 8 graded stone aggregate 20 mm nominal size). For Gidi-C Colliery:- 0.75 Mtr X 0.75 Mtr X 0.50 Mtr X 60 Nos=16.87 CUM. For Gidi-A Colliery:- 0.75 Mtr X 0.75 Mtr X 0.50 Mtr X 30 Nos=8.43 CUM.

Total impact of GST for the purpose of CTC

Nehru Electricals