|
| 1 | Supply, Installation, Testing & Commissioning Earth electrode Cu Bonded rod 17.2 mm dia X 3000 mm - 250 micron UL Listed 467 and IEC - 62561-2: 17.2/OD SS Clamp Both side; Eco safe Based environment friendly backfill and suitable clamp, Back-fill earthing enhancing compound should strictly be a Eco Safe Carbon based conductive concrete type which has a resistivity of less than 0.12 Ohm Mtr as per Clause 14.5D of IEEE:80 standard. Back-fill compound should be electronically conductive (Like in metals) and should not depend on moisture for conduction. Back-fill compound should be environment friendly, should solidify when mixed with water and set like concrete and should not leach / diffuse into the ground. Back-fill compound shall not be mixed with any soil while pouring in the bore hole. Type) - 25 kg as per IS/IEC - 62561-7, IEEE -80 and IS 3043 : Eco friendly rust proof heavy duty weather proof polyethylene Earth pit chamber with following dimension : 254 mm dia (top). 330 mm dia (Bottom) & 260 mm (height) as per, resistance value below 1 ohm as per IS:3043:2018, Type test report for earth electrode as per IEC 62561-2 ( coating test,Adhesion test, Bend test, Environment test, Electrical resistivity, Tensile test etc ) Type test report for backfill compound as per IEC 62561-7(Corrosion test, Leach test, Sulphur test,Resistivity test etc Note:-(i)Earthing work is to be carried out by OEM i.e. JEF TECHNO SOLUTIONS PVT LTD/ OBE Betterman/ERICO/ FURSE/ INGESCO/ JMVLPS/True Power/ Roksna India Pvt Ltd.(ii) The contractor shall be required to submit a MOU with OEM for the same and it will be an essential requirement in Technical Evaluation stage. The tenderer shall required to upload MOU with OEM otherwise bids shall not be qualify for opening of finance bid, MOU from autorised dealers of OEM shall not be accepted.(iii) In case less than 1.0 Ohm result has not achieved at site, the contractor is responsible to done grid system to achieve the desired result and each earthing shall be measured seperately.(iv) Cost of additional earth continuty conductor which were required for grid connection as per site requirment shall be measured and paid seperately. |
| 2 | Testing & Survey of Earth Soil Resistivity(P) as per Cl. 10.3 of IS 3043:2018, BS 7430,JEEE 80,IEEE 81 using CDEGS software for earthing, CURRENT DENSITY AT THE SURFACE OF EARTH ELECTRODE/STRIP, Fault Current dissipation by grid conductor, Calculation for earth grid resistance as per BS 7430-1985- CI: 8.5, Overall resistance of earthing electrodes [R1], Overall Resistance of Earth strip [R2] below grid, Overall resistance of Earth Grid[R]=(R1xR2)/(R1+R2) complete all as specified and directed. |
| 3 | Supply, Installation, Testing & Commissioning 10 mm dia steel conductor with 100-micron CU bonding tested as per IEC 62561-2 conducted in the Govt. aggregated third party laboratories to meet the requirement of IS/IEC 62305 complete all as specified and directed. |
| 4 | Supply, Installation, Testing & Commissioning Exothermic Joint for straight connection of 10 mm dia conductor as per IEEE 837 Standard complete all as specified and directed. |
| 5 | Supply, Installation, Testing & Commissioning Exothermic Jointfor Cross connection of 10 mm dia conductor as per IEEE 837 Standardcomplete all as specified and directed. |
| 6 | Supply, Installation, Testing & Commissioning Exothermic Joint for T connection of 10 mm dia conductor as per IEEE 837 Standard complete all as specified and directed. |
| 7 | Spply, Installation, Testing & Commissioning Equipotential SS bus Bar as per IS/EC 62305 complete all as specified and directed. |
| 8 | Supply, Installation, Testing & Commissioning flat strip round connectors as per IS/IEC 62305 complete all as specified and directed. |
| 9 | M&L for construction of earth pit chamber of internal dimensions of 300x300x250mm in brick masonry built in PCC 1:3:6 type C-1 using 20mm gradedstone aggregate for earth pit with pre cast RCC cover slab (1:2:4)type B-1 using 20mm graded stone aggregate 40mm thickreinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia MS round bar handle complete all as specified and directed. |
| 10 | S&F of earth continuity conductor or main earthing lead 32mmx6mm copper strip/earth lead, laid in trench, fixed on walls or any other position including jointing by tinned copper/brass nuts, bolts and washers in addition to brazing at every joint, complete all as specified and directed. |
| 11 | S&F HRFR single core copper conductor of size 35 Sqmm from equipment to copper strip as specified and directed. |
| 12 | M&L for 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 directed. |
| 13 | S&F ofHigh density polyethylene pipes (HDPE) of size 40mm dia laid in trenches as well as fixed to wall with provisioning of suitable sizes of MS clamps (1 mtr apart), screws etc for passing of lightning arrester strips complete all as specified and directed. |
| 14 | S&F of porcelain insulators for fixing roof/down conductor including fixing of screws etc as specifed and directed. |
| 15 | M&L for making MS Sheet as per existing shape/size not exceeding 200mmx300mm width and writing following details in Capital letters form of 25mm height and 10mm width on single side of the board in black colour with red or yellow colour back ground as required at site complete shall be embedded in PCC foundation with 50x50x6mm angle post properly complete all as specified and directed with following:- (a)Type of earthing-GI or Copper or Chemical(b)Earthing for which equipment is being connected (e.g. lightning arrester)(c)Number of earth pit and the total number of particular type of earthing for that Bldg/Equipment (e.g. Number-01 Lightning Arrester pit out of 04 Nos pit of same- \"LA-01/04\") |
