REPAIR/REPLACEMENT OF EARTHING WORKS REPLACEMENT OF EARTHING STRIPS LIGHTENING CONDUCTOR/ARRESTOR WORKS, STREET LIGHT POLE AT BASE CAMP AND AT AF STN THOOISE UNDER GE AF THOISE

Amount

Taking down air termination rod any type and any size complete all as specified and as directed by Engr-in-Charge.

Taking down strip of any type and any size complete all as specified and as directed by Engr-in-Charge.

Taking down old unsv earthing any type and any size complete all as specified and as directed by Engr-in-Charge.

S&F Air termination, single pointed, copper rod 12mm dia and 300mm long complete all as specified and as directed by Engr-in-Charge.

S&F Copper Strip of 20 x 3mm, ISI Marked to interconnect the earth pit to Equipment Room/ LT pannel. Bus bar, DG set complete all as specified and as directed by Engr-in-Charge.

S&F Copper Strip 20x3.15 mm with saddles and fixing screws etc for roof conductors and down conductors above ground to interconnect the earth pit complete all as specified and as directed by Engr-in-Charge.

S&F Aluminum strip of 25 x 3mm, ISI Marked to interconnect the earth pit to LT Pannel, Bus bar complete all as specified and as directed by Engr-in-Charge.

M&L for Maintenance free chemical earthing system complete with 01 (One) Nos. UL 467 approved copper bonded earth rods 17mm dia. 3000mm long electrode buried in ground to bore holes 100mm dia vertically to a depth not less than 3.00 Mtr deep below ground level with top edge earth electrode at a depth not less than 300 mm below normal ground level, provision of copper bus bar of size 100mmX25mmX5mm for inter connection with copper earth lead strip 25mmX2mm and further connected to test point terminal block of size 200mmX50mmX6mm made of copper as directed, including 45 Kg (Minimum) NABL Lab Certified back fill chemical compound for filling bore holes with soil mixed, so as to achieve earth resistance below 2 Ohms including excavation and earth work and earth neutral voltage less than 03 Volts of PCC chamber in PCC (1:3:6) typeC-1 (using 20mm graded stone aggregate) with Pit cover of 300mmX300mm made of Cast Iron complete all as specified and as directed by Engr-in-Charge.

M&L for Earthing complete with copper plate electrode 600x600x3.15mm thick electrode burried directly in ground not less than 3.0 mtr deep below normal ground level with top edge of earth plate not less than 2.5 mtr below normal ground level connected to and including and 20x3 mm copper strip as earth lead by means of bolt ,nuts, check nuts, and washers of stainless steel and duly welded incl PCC pit in PCC 1:2:4 type B-I angle iron 40x40x3mm frame, pit in PCC 1:2:4 type B-I cover 40mm reinforced with XPM weight not less than 4 Kg/Sqm and 6mm dia bar handle, excavation and earth work in any type of soil, charcoal dust and salt light grade GI watering pipe 20mm bore with funnel and wire mashand medium grade GI protection pipe 40mm bore and earth wire up all as shown in electrical plate No 3 of MES SSR- Part-I all as directed and specified by Engineer-in-charge. Note : (i) Excavation work should be done by manpower only. (ii) Earth test should be done by contractor at his own cost and if required result is not found at site, entire earthing should by contractor again without accruing any extra cost to the department. No claim whatsover on redoing the earthing shall be admissible by the department to the contractor.

S&F porcelain insulator 15 BMD type with nut bolts and screws for fixing copper strips on walls/roof etc complete all as specified and as directed by Engr-in-Charge.

S&F test point terminal block made of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed including 3 nos. 8mm dia 25mm long hex. head screw complete all as specified and as directed by Engr-in-Charge.

M&L in repair PCC earthing pit including PCC 1:2:4 type B-I angle iron 40x40x3mm frame, pit in PCC 1:2:4 type B-I cover 40mm reinforced with XPM weight not less than 4 Kg/Sqm and 6mm dia bar handle, excavation and earth work in any type of soil, charcoal dust complete all as specified and al as diredcted by Engr-in-Charge.

M&l for Fixing arrangement of lightening arrester , welding materials & labour at roof top where required complete all as specified and as directed by Engr-in-Charge.

M&L for in repair , in truly vertical position Steel tubular swaged pole with cast iron base plate finial tapper plug, bolts nuts and screws and specified type 410 SP-31 (9 mtr long) in truly vertical position 1.5 m length of pole above ground level shall be painted with two coats of synthetic enamel paint in strips of 30 cm width, black and yellow alternatively and painting with two coats of aluminum paint over a coat of red oxide primer on rest part of pole and its connected parts complete all as specified and as directed by Engr-in-Charge. Note -Excavation and PCC shall be measured and paid separately

Excavating in trenches not exc 1.5 m wide and not exc 1.5 m in depth for foundation of poles etc not exc 10 sqm on plan and getting out in hard /dense soil complete all as specified and as directed by Engr-in-Charge.

Excavating in trenches not exc 1.5 m wide and exc 1.5 m but not 3 m in depth for foundation of poles etc not exc 10 sqm on plan and getting out in hard /dense soil complete all as specified and as directed by Engr-in-Charge.

Removing excavated material (soils) not exc 50 m and depositing where directed at a level not exc 1.5 m above the starting point complete all as specified and as directed by Engr-in-Charge.

M&L for Plain cement concrete M-7.50 (1:4:8), type D-2 (using 40mm graded crushed stone aggregate), as in or as mass concrete in foundation of poles/ stays etc, complete all as specified and as directed by Engineer-In-Charge.

M&L for Plain cement concrete M-10 (1:3:6), type C-2 (using 40mm graded crushed stone aggregate), as in or as mass concrete in foundation of poles/ stays etc, complete all as specified and as directed by Engineer-In-Charge.

M&L for Plain cement concrete M-15 (1:2:4), type B-1 (using 20mm graded crushed stone aggregate), as in coping of poles including necessary form work, finish even and smooth without using extra cement, complete all as specified and as directed by Engineer-In-Charge.

M/S NINDI BUILDERS

darshan kumar gandhi

SANJEEV ENTERPRISES

KONCHOK TSEWANG