tender for supply installation testing comissioning of earthing arrangements for 193 andul road r.h.e. under howrah electrical section, h.d. - earthing with 50 mm dia gi pipe 3.64 mm thick x 3.04 mts. long and 1 x 4 swg gi (hot dip) wire (4 mts. long), 13 mm dia x 80 mm long gi bolts, double nuts, double washers incl. s & f 15 mm dia gi pipe protection (1 mts. long) to be filled with bitumen partly under the ground level and partly above ground level driven to an average depth of 3.65 mts. below the ground level as below:by tata-medium gi pipe 2 excavation of soil for installation of earth electrode and filling & ramming.for soft soil 3 supplying & fixing earth busbar of galvanized (hot dip) ms flat 25 mm x 6 mm on wall having clearance of 6 mm from wall includingproviding drilled holes on the busbar complete with gi bolts,nuts, washers, spacing insulators etc. as required 4 extra for providing masoneryenclosure on the top of the earthelectrode of overall size 86.36 cm x 86.36 cm x 46 cm deep(below ground level) complete with cemented brick work(1:6)of 25 cm width duly plastered with cement morter (inside) cihinged inspection cover of size 36.56 cm x 35.56 cm with lockingarrangement, gi reducer including drilling of 46 nos. 12 mm diaholes on the gi pipe 5 connecting the equipments to earth busbar including s & fgi (hot dip) wire of size as below on wall/floor with staples buried inside wall/floor as required and making connection to equipments with bolts, nuts, washers, cable lugs etc. as required and mending good damages 4 swg 6 supplying and fixing 13mm dia 3mm thick polythene pipe 7 supplying & fixing 25 mm dia medium gauge gi pipe ( isi-medium) protection with necessary fittings and jointing metarials as required 8 excavation of soil and laying pipe for cable laying filling & ramming.(0.20x0.450xtotal length of pipe laying (wxdxl) 9 add. g.s.t.@ 18% (on total from item no 1 to 8) to be calculated by bidder 10 add. lwc.@ 1%to be calculated (on total from item no 1 to 8 + gst@18%) by bidder