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| 1 | Construction of earth pit by carrying out earthwork excavation and boring/drilling of the ground up to a depth of 22 feet with a 4-inch dia bore to accommodate the earth electrode. The area surrounding the electrode shall be properly filled and compacted with a mixture of charcoal and soil to ensure effective grounding.A masonry chamber shall be constructed to house the top end of the electrode, and the pit shall be securely covered with a Cast Iron (CI) pit cover of size 300 mm x 300 mm. All necessary materials, including the charcoal, CI pit cover, masonry work material and other accessories, are to be supplied by the contractor. | Construction of earth pit by carrying out earthwork excavation and boring/drilling of the ground up to a depth of 22 feet with a 4-inch dia bore to accommodate the earth electrode. The area surrounding the electrode shall be properly filled and compacted with a mixture of charcoal and soil to ensure effective grounding.A masonry chamber shall be constructed to house the top end of the electrode, and the pit shall be securely covered with a Cast Iron (CI) pit cover of size 300 mm x 300 mm. All necessary materials, including the charcoal, CI pit cover, masonry work material and other accessories, are to be supplied by the contractor. |
| 2 | Excavation of a trench for laying the earthing strip from the earth pit to the building wall. The trench shall be excavated to a depth of 1.5 feet and a width of 6 inches.After proper placement of the earth strip, the trench shall be backfilled with the excavated soil, compacted in layers to restore original ground conditions. | Excavation of a trench for laying the earthing strip from the earth pit to the building wall. The trench shall be excavated to a depth of 1.5 feet and a width of 6 inches.After proper placement of the earth strip, the trench shall be backfilled with the excavated soil, compacted in layers to restore original ground conditions. |
| 3 | Supply of insulated Copper strip 50 mm W X 6 mm thk (approx.) | Supply of insulated Copper strip 50 mm W X 6 mm thk (approx.) |
| 4 | Supply of 50 NB GI pipe, Heavy (Class C) as per S 1239 Gi Pipe , Long, approx. 6 mtr long | Supply of 50 NB GI pipe, Heavy (Class C) as per S 1239 Gi Pipe , Long, approx. 6 mtr long |
| 5 | Fabrication/ construction and installation of an earth electrode using a 6-meter-long GI pipe along with a copper strip ( above supplied) securely fixed on the surface of the pipe. The copper strip shall be fixed longitudinally along the length of the GI pipe using self-tapping screws, ensuring firm and continuous contact. The GI pipe shall be perforated/drilled in three rows, spaced at 1-foot intervals along the entire length. The assembly shall be vertically driven into the earth pit as per the instruction of the site in charge. All fixing hardware and tools, including self-tapping screws and other installation accessories, shall be arranged by the contractor. | Fabrication/ construction and installation of an earth electrode using a 6-meter-long GI pipe along with a copper strip ( above supplied) securely fixed on the surface of the pipe. The copper strip shall be fixed longitudinally along the length of the GI pipe using self-tapping screws, ensuring firm and continuous contact. The GI pipe shall be perforated/drilled in three rows, spaced at 1-foot intervals along the entire length. The assembly shall be vertically driven into the earth pit as per the instruction of the site in charge. All fixing hardware and tools, including self-tapping screws and other installation accessories, shall be arranged by the contractor. |
| 6 | Laying of above supplied insulated Copper strip 50 mm W X 6 mm thk (approx.) from earth electrode to earth grid in the above excavated trench. | Laying of above supplied insulated Copper strip 50 mm W X 6 mm thk (approx.) from earth electrode to earth grid in the above excavated trench. |
| 7 | Supply of Pin type Anchor fastener M12 with washer | Supply of Pin type Anchor fastener M12 with washer |
| 8 | Supply & fixing of Copper Strip earth bar, 50 mm Width X 6 mm thick, 6 ft-Long for earth grid connection. It should have 8 mm dia hole x 24 nos. It should be fitted on wall with above supplied M12 anchor fasters. | Supply & fixing of Copper Strip earth bar, 50 mm Width X 6 mm thick, 6 ft-Long for earth grid connection. It should have 8 mm dia hole x 24 nos. It should be fitted on wall with above supplied M12 anchor fasters. |
| 9 | Supply and fixing of Copper Strip earth bar 50 X 6 mm thick, 2ft-Long. It should have 8 mm dia hole x 12 nos. It should be fitted on wall with above supplied M12 anchor fasters. | Supply and fixing of Copper Strip earth bar 50 X 6 mm thick, 2ft-Long. It should have 8 mm dia hole x 12 nos. It should be fitted on wall with above supplied M12 anchor fasters. |
| 10 | Supply of Copper flat socket 10 sq. mm | Supply of Copper flat socket 10 sq. mm |
| 11 | Supply of SS316 bolt, Nut with double washer M6 size x 25 mm long | Supply of SS316 bolt, Nut with double washer M6 size x 25 mm long |
| 12 | Supply, laying, and connection of 2-core, 10 sq.mm, multi-stranded, XLPE-insulated, copper armoured cable (1.1 kV grade) from the main earth grid (1 No.) to twelve (12) earth bars located at various points. Terminations shall be done using the supplied sockets and fasteners, ensuring proper and secure connections. The cable shall be laid as per site conditions—either in trenches, on walls, or cable trays—with appropriate routing and clamping. All consumables, such as PVC insulation tape, cable ties, saddles, clamps, and other accessories required for safe and complete installation, shall be provided by the contractor. | Supply, laying, and connection of 2-core, 10 sq.mm, multi-stranded, XLPE-insulated, copper armoured cable (1.1 kV grade) from the main earth grid (1 No.) to twelve (12) earth bars located at various points. Terminations shall be done using the supplied sockets and fasteners, ensuring proper and secure connections. The cable shall be laid as per site conditions—either in trenches, on walls, or cable trays—with appropriate routing and clamping. All consumables, such as PVC insulation tape, cable ties, saddles, clamps, and other accessories required for safe and complete installation, shall be provided by the contractor. |
