Name of Work: Repair and Maintenance works of the existing all Earthing system at old & Newblock of NIFT Kolkata
Sl. No.
Item Description
1
Earthing with G.I. earth pipe 4.5 Meter long, 40 mm dia including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe etc. with charcoal/coke and salt as required.
2
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 Meter long etc. with charcoal/ coke and salt as required.
3
Supplying and laying 25 mm X 5 mm copper strip at 0.50 metre below ground as strip earth electrode, including connection/terminating with nut, bolt, spring, washer etc. as required.(Jointing shall be done by overlapping and with 2 Eachs of brass nut bolt & spring washer spaced at 50mm)
4
Providing and fixing 25 mm X 5 mm copper strip in 40 mm dia G.I. pipe from earth electrode including connection with brass nut, bolt, spring, washer excavation and re-filling etc. as required.
5
Providing and fixing 25 mm X 5 mm copper strip on surface or in recess for connections etc. as required.
6
Providing and fixing 25 mm X 5 mm G.I. strip on surface or in recess for connections etc. as required.
7
Providing and fixing earth bus of 50 mm X 5 mm copper strip on surface for connections etc. as required.
8
Providing and laying G.I. tape 32 mm X 6 mm from earth electrode directly in ground as required.
9
Laying copper/ G.I. tape 32 mm X 6 mm from earth electrode directly in ground as required.
10
Providing and fixing 4.00 mm dia copper wire on surface or in recess for loop earthing along with existing surface/ recessed conduit/ submain wiring/ cable as required.
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