Supply, Installation, testing and commissioning of earth pits for replacing failed unserviceable earth pits for various buildings and facilities at CSIR-NAL, Belur campus, Bengaluru - 37

Amount

Supply,installation,testing and commissioning of maintenace free earth pit of GI dual pipe of 3000mm long (min)75mm dia as outer pipe with (min)45mm dia of inner pipe of 80-100 microns galvanized, filled with highly conducting metallic compounds with the permanent sealing at both the ends and lead terminal of 50 X 8 mm size at the top the length of the electrode shall be 3000 mm excluding the lead terminal and the length of the lead terminal at the top shall be 100 mm. To ensure the moisture content and electrical conductivity, resistance lowering grounding minerals shall be filled around the electrode (min 50kgs). Heavy duty weather proof plastic earth pit chamber with cover of dimension 250mm dia (top), 330mm dia(bottom) and 260mm (height) shall be used, Numbering of pit and measured value shall be written with weather proof painting or stickering.

Supply,installation,testing and commissioning of maintenace free earth pit of GI dual pipe of 2000mm long (min)75mm dia as outer pipe with (min)45mm dia of inner pipe of 80-100 microns galvanized, filled with highly conducting metallic compounds with the permanent sealing at both the ends and lead terminal of 50 X 8 mm size at the top the length of the electrode shall be 2000 mm excluding the lead terminal and the length of the lead terminal at the top shall be 100 mm. To ensure the moisture content and electrical conductivity, resistance lowering grounding minerals shall be filled around the electrode (min 25kgs). Heavy duty weather proof plastic earth pit chamber with cover of dimension 250mm dia (top), 330mm dia(bottom) and 260mm (height) shall be used, Numbering of pit and measured value shall be written with weather proof painting or stickering.

Supply,installtaion,testing and commissioning of maintenace free earth pit of copper single pipe of 3000mm long (min)75mm dia pipe with thickness of 1.6 to 1.8mm, filled with highly conducting metallic compounds with the permanent sealing at both the ends and lead terminal of 50 X 8mm size at the top, the length of the electrode shall be 3000 mm excluding the lead terminal and the length of the lead terminal at the top shall be 100 mm. To ensure the moisture content and electrical conductivity, resistance lowering grounding minerals shall be filled around the electrode (min 50kgs). Heavy duty weather proof plastic earth pit chamber with cover and dimension 254mm dia (top), 330mm dia(bottom) and 260mm (height) shall be used,Numbering of pit and measured value shall be written with weather proof painting or stickering.

Supply,installation,testing and commissioning of maintenace free earth pit ofcopper single pipe of 2000mm long (min)45mm dia pipe with thickness of 1.6 to 1.8mm, filled with highly conducting metallic compounds with the permanent sealing at both the ends and lead terminal of 50 X 8 mm size at the top, the length of the electrode shall be 2000 mm excluding the lead terminal and the length of the lead terminal at the top shall be 100 mm. To ensure the moisture content and electrical conductivity, resistance lowering grounding minerals shall be filled around the electrode (min 25kgs). Heavy duty weather proof plastic earth pit chamber with cover and locking facility of dimension 254mm dia (top), 330mm dia(bottom) and 260mm (height) shall be used,Numbering of pit and measured value shall be written with weather proof painting or stickering.

Supply,installation,testing and commissioning of maintenace free earth pit of GI pipe of 1000mm long (min)45mm dia, filled with highly conducting metallic compounds with the permanent sealing at both the ends and lead terminal of 30X4 mm size at the top the length of the electrode shall be 1000 mm excluding the lead terminal and the length of the lead terminal at the top shall be minimum 50mm. To ensure the moisture content and electrical conductivity, resistance lowering grounding minerals shall be filled around the electrode of (min16 Kg) .Heavy duty weather proof plastic earth pit chamber with cover of dimension 160mm dia (top), 240mm dia(bottom) and 230mm (height) shall be used, Numbering of pit and measured value written with weather proof painting or stickering.

Providing and fixing 25 mm X 5 mm G.I. strip on surface or in recess for connections etc. as required.

Supplying and laying 25 mm X 5 mm G.I strip at 0.50 metre below ground as strip earth electrode, including connection/ terminating with G.I. nut, bolt, spring, washer etc. as required. (Jointing shall be done by overlapping and with 2 sets of G.I. nut bolt & spring washer spaced at 50mm)

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 sets of brass nut bolt & spring washer spaced at 50mm)

Providing and fixing 25 mm X 5 mm copper strip on surface or in recess for connections etc. as required.

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.

Providing and fixing 6 SWG dia G.I. wire on surface or in recess for loop earthing as required.

Providing and laying in position cement concrete 1:3:6 (1 cement : 3 coarse sand : 6 graded stone aggregate 20 mm nominal size) in foundation of pump, DG set etc. including form work etc. as required.

Cutting of cement concrete floor before excavation of earth for trenching.

AKEY ELECTRO TECHNIQUES