REPAIR/REPLACEMENT, MAINTENANCE AND

Dismantling & taking out old unserviceable earthing pits including connected materials all as specified and directed.

M&L for earthing complete with galvanised steel earth plate electrode 600mm x 600mm x 6mm thick buried directly in ground (earth pit not less than 2.25 M deep below ground level) with top edge of the plate not less than 1.5 M below normal ground level connected to galvanised earth lead wire of size 4.0mm dia up to a length of 7.5 mtr long by means of nuts, bolts, check nuts, washers of galvanised iron or steel all as shown in electrical plate No. 3 of SSR Part I of 2009 connected to earthing test point or disconnecting / testing link including excavation/ earth work in any strata, removal of surplus soil, GI pipe medium grade 20mm dia for watering and funnel, GI Pipe medium grade 15mm dia for earth lead protection, PCC 1:3:6 type C2 bed and chamber in PCC 1:2:4 type B1 including necessary form work, 10mm thick CI chamber cover with hinge, etc. complete all as specified and directed.

M&L for earthing complete with galvanised steel earth plate electrode 600mm x 600mm x 6mm thick buried directly in ground (earth pit not less than 2.25 M deep below ground level) with top edge of the plate not less than 1.5 M below normal ground level connected to galvanised strip of size 25x4 mm up to a length of 7.5 mtr long by means of nuts, bolts, check nuts, washers of galvanised iron or steel all as shown in electrical plate No. 3 of SSR Part I of 2009 connected to earthing test point or disconnecting / testing link including excavation/ earth work in any strata, removal of surplus soil, GI pipe medium grade 20mm dia for watering and funnel, GI Pipe medium grade 40mm dia for earth lead protection, PCC 1:3:6 type C2 bed and chamber in PCC 1:2:4 type B1 including necessary form work, 10mm thick CI chamber cover with hinge, etc. complete all as specified and directed.

All same as per item No 3 here-in-before but galvanised strip of size 32 x 6mm

Material and Labour for maintenance free earthing complete comprising of 17.2 mm dia 3 meter long Earth electrode of low carbon steel electrode with 250 micron copper bonding, 50 pounds of Ecosafe 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 meter 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 water and set like concrete and should not leach /diffuse into the ground. Back-fill compound shall not mix with any soil while pouring in the bore hole. Test Certificate as per IEC :62561-7 for Back-fill compound shall be submitted alongwith the material. 17.2 OD SS clamp both side, Eco friendly rust proof heavy duty weather proof Polyethylene Earth pit chamber with following dimensions : 254 mm dia (top),330 mm dia (bottom) & 260 mm (height) complete all as specified and directed.

M&L for earthing complete with copper earth plate electrode 600mm x 600mm x 3.15mm thick buried directly in ground (earth pit not less than 2.25 M deep below ground level) with top edge of the plate not less than 1.5 M below normal ground level connected to copper strip of 20x3 mm up to a length of 7.5 mtr long by means of nuts, bolts, check nuts, washers of galvanised iron or steel all as shown in electrical plate No. 3 of SSR Part I of 2009 connected to earthing test point or disconnecting / testing link including excavation/ earth work in any strata, removal of surplus soil, GI pipe medium grade 20mm dia for watering and funnel, GI Pipe medium grade 40mm dia for earth lead protection, PCC 1:3:6 type C2 bed and chamber in PCC 1:2:4 type B1 including necessary form work, 10mm thick CI chamber cover with hinge, etc. complete all as specified and directed. Note for item Nos 2 to 6 : (a) Earthing value should be less than 5 ohms for Ser item No 2 to 5 and less than 1 ohms for ser item No 6. (b) If desired value of earth resistance not achieved during testing, the earthing work shall be redone by the contractor at free of cost to achieve the desire value of earthing resistance. The rate quoted by the contractor deemed to be inclusive of the provision.

Supply and fix in repairs GI strip of size 25mmx4mm as earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing using clamps & nut bolt as required complete all as specified and directed.

Supply and fix in replacement earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc as required 4mm dia galvanised iron or steel wire complete all as specified and directed.

Supply and fix in repairs aluminium strip 25 mm x 3.15 mm complete with saddles and fixing screws etc for roof conductors and down conductors above ground level and fixing upto 20 mtr height including removing u/s strips complete all as specified and directed.

Supply and fix in repairs copper strip 20mm x 3.15 mm complete with saddles and fixing screws etc for roof conductors and down conductors above ground level and fixing upto 20 mtr height including removing u/s strips complete all as specified and directed.