replacement of damged electrical items and other electrical works at swm ward offices in br xi 103,104,111,113,114 and br office to br xii 101,105,106,107,109 and br office area under swm deptt.kmc.--earthing installations.earthing installation ... with pipe electrode.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:(a)by isi medium gi pipe. , for earthing installations.soil excavation.excavation of soil for installation of earth electrode and filling & ramming.for soft soil, equipment earthing.connecting the equipments body to earth busbar including s&f 20 mm x 3 mm galvanised (hot dip) ms flat on wall/floor with gi saddles as required and connection to equipments incl. drilling holes, with bolts, nuts, washers etc. , i basic rate of materials: (all rates of materials from k-1 to k-14 are excluding vat) 54. 40mm heavy gauge polythene pipe, earth continuty condnetor connecting the equipments to earth busbar including s & f gi (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.solid gi wire.no. 8 swg