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| 1 | M&L for aluminium strip (25 x 3.15)mm with saddles and fixing screws etc. for roof conductors and down conductors above ground complete all as specified and as directed. |
| 2 | M&L for air termination, single pointed aluminium rod 12mm dia and 300mm long including fixing on GI pipe and necessary welding etc complete all as specified and as directed. |
| 3 | M&L in replacement of test point terminal block made of gun metal or phosphorus bronze size (75x75x25)mm drilled and screwed including 3 nos. 8 mm dia 25mm long hexagonal head screw complete all as specified and as directed. |
| 4 | Supply, installation, testing & commissioning of maintenance free earth (grounding) Elancrete electrode of size100mm Dia x 30.5 Mtr long with 17.2 mm Cu bonded MS conductor precast or cast-in-situ cast in high purity electrically conductive granular material having ultra low resistive value of 0.001 Ohm-m. Electrode made of conductive earth enhancing material mixed with cement in the ration (3:1) to achieve result of earth resistance less then 1 Ohm encase or backfill the voids surrounding the 17.2mm Cu bondedMS conductor or other metal components placed in augured bore hole of 100 mm dia x 30.5 Mtr depth, resulting to increase in the effective surface area of the earth electrode or grids to lower the resistance. Earth enhancing material should not leach chemicals into the adjacent soil or underground water channels and should be in pH neutral range. Earth enhancing material should permanently protect the encased metal components of the earthing systems, copper bonding on MS rod should be minimum 250 microns.All hardware like nuts, bolts and washers should be of SS. Electrode should withstand fault current upto 35 kA for 1 second. Electrode\"s top terminal be sealed permanently packed with conductive concrete and Cu bonded MS / copperstrip taken out be terminated on to earth test point and equipment terminal.Test certificate of NABAL laboratory shall be submitted by the contractor, test link of size 50 mm X 6 mm X 200 mm, RCC pit cover including brazing of all the joints upto test point complete all as specified and as directed by Engr-in-Charge. Make:- Elancrete/Marconite/SN Engineering |
| 5 | M&L forearthing complete with copperearth plate electric (60cm x 60cm) x 3.15mm thick burried directly and vertically in ground (earth pit not less than 2.25m deep below ground level) with top edge of the plate not less than 1.5 m below normal ground level connected to copper strip (20 x 3)mm as earth lead by means of bolts, nuts, check nuts and washers of galvanised steel and including necessary earth work, execution in any type of latent rock, PCC (1:3:6) type C2 chamber and chamber cover 50mm thick PCC (1:2:4) with 8mm dia CTD reinforcement watering pipe 20mm dia GI, protection pipe for copper strip 40mm dia GI light grade, salt, coal, magnesium sulphate and water funnel etc complete all as per electrical plate No 4 of SSR Part I. To obtainedearth resistance value and prepare testsheetofnewly constructed earth pitshall be responsibility of contractor. Note:-If the desired earth resistance as per equipmentrequirement is not obtained the earthing shall be re-done by contractor without any extra cost to Govt. Make:- Elancrete/Marconite/SN Engineering |
| 6 | M&L for earthing in replacement with galvanized mild steel earth plate electrode of size (60cm x 60cm) x 6mm thick buried directly in ground (earth pit not less than 2.25 Mtr below ground level) with top edge of earth plate not less than 1.5 Mtrs below ground level connected to GI strip (32x6)mm as earth lead by means of nuts, bolts, thimbles, chuck nuts, washers of GI or steel, including PCC (concrete chamber) (1:3:6) type C-1 (using 20mm graded stone aggregate), with fair finished internal surface of concrete chamber shall be given 15mm thick plaster in CM (1:4), funnel with wire gauge mesh, 80 mm thick RCC pit cover of size (320 mm x 320mm) of RCC (1:2:4) type B-1 (using 20 mm graded stone aggregate) reinforced with XPM, JALLI and charcoal dust and common salt all as shown in electrical plate No 3 of MES SSR Part-I (2009) and specified includingprovision of GI stripprotected by 40 mm dia medium grade pipe and watering pipe shall be 20mm bore medium grade, and including all excavation andearth work & connecting the earthing to an earthing test pointcomplete all as specified & directed by Engr-in-Charge. Make:- Elancrete/Marconite/SN Engineering |
| 7 | M&L for copper strip (20x3.15)mm with saddles and fixing screws and joints with brazing including porcelain holder insulator for separation of strip as required at site etc for roof conductor, down conductor above ground complete all as specified and as directed. |
| 8 | M&L for GI pipe medium grade 40 mm dia complete with all fittings and welding works complete, including taking out old unserviceable GI pipe complete all as specified and as directed. |
| 9 | S&F steel water tubing 15 mm dia medium grade conforming to IS 1239of 1990 for fixing on wall / trenches including tee, bends reducers, unionsetc, complete all as specified and as directed. |
| 10 | S&F steel water tubing 20 mm dia medium grade conforming to IS 1239of 1990 for fixing on wall / trenches including tee, bends reducers, unionsetc, complete all as specified and as directed. |
| 11 | S&F bib tap 15 mm dia, cast copper alloy with crutch or butterfly handle, screwed down, screwed for iron pipe or for brass ferrule and fixed complete all as specified and as directed. |
| 12 | M&L for PCC (1:3:6) type CI (using 20mm graded stone aggregate) complete all as specified and as directed. |
| 13 | M&L for air termination, single pointed copper rod 12mm dia and 300mm long including fixing on GI pipe and necessary welding etc complete all as specified and as directed. |
| 14 | M&L for GI strip (32 x 6)mm with including necessary fixing arrangements complete all as specified and as directed. |
| 15 | M&L for steel tubular swaged poles complete with cast iron base plate, finial taper plug, bolts, nuts and screws, type 410 SP-31 (09 Mtr long) with and including two coats of bituminous paint internally and externally for the portion embedded in concrete and two coats of aluminium paint over one coat of red oxide primer to external/exposed surfaces complete all as specified and as directed. Note:- Excavation, earth work and PCC shall be measured and paid separately under relevant items. |
| 16 | Excavation in trenches not exceeding 1.5m wide and not exceeding1.5m in depth and getting out for laying of pipe/cable in soft/loose soil complete all as specified and as directed. |
| 17 | Excavation in trenches not exceeding 1.5m wide and exceeding1.5m but n exc 3.0mtr in depth and getting out for laying of pipe/cable in soft/loose soil complete all as specified and as directed. |
| 18 | Returning, filling in including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick complete all as specified and as directed. |
| 19 | Removing excavated material to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5m from the starting point complete all as specified and as directed. |
| 20 | M&L for PCC (1:2:4) type B2 (using 40mm graded stone aggregate) as in foundation filling and mass concrete complete all as specified and as directed. |
| 21 | M&L for PCC (1:2:4) type B1 (using 20mm graded stone aggregate) as in coping including necessary weathering and form work and finishingcomplete all as specified and as directed. |
