supply & installation of electrical and mechanical accessories and making of valve chamber at near bose para over head reservoir in ward no.14, under khardah municipality supply and installation of electrical and mechanical accessories and making of valve chamber at near bose para over head reservoir in ward no.14, under khardah municipality , supply of 1.1. k.v. grade pvc / xl pe insulated armoured al. conductor cable. a ) cable size 4 x 70 sq.mm. ( make: gloster / kei / mescab ) , laying only cable of underground trench. a ) cable size: 4x70 sq. mm. , supply of 1.1 kv grade pvc / xlpe insulated copper cable. a ) cable size: 3x6 sq. mm. ( make: finolex / gloster ) , laying of one no. cable up to 35 sq. mm. in underground trench 460 mm. wide x 760mm. average depth with brick protection on the top of the cable with 8 ( eight ) nos. bricks per meter, including fitting the space between the brick & cable and also the trench with shifted soil, leveling up and restoring surface duly rammed. , supply, fitting & fixing following hdpe pipe for underground work of approved make ( medium quality ) conforming to is 4984_1985 trenches up to 1.5 m. below surface in all sorts of soil & refilling the same as directed complete in all respect including laying of g.i. wire. a ) 40 mm. dia. , earthing with 50mm. dia. g.i. pipe 3.64mm. thick x 3.04 mtrs. long and 1 x 4 swg g.i. ( hot dip ) wire ( 4 mts. long 13 mm. dia. x 80mm. long g.i. bolts. double nuts, double washers’ incl. s&f 15 mm. id. g.i. pipe protection ( 1 mtr. long ) to be filled with bitumen partly above ground level driven to an average depth of 3.65 mtr. below the ground level as below. make: tata medium g.i. pipe. , connecting the equipments to earth busber including s&f of g.i. ( 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, cables lugs etc. as required and mending good damages. a ) no. 8 swg. , supply & fixing of 100 amp. 440 volts main switch. ( make : flora ) , s&f compression type gland complete with brass gland brass ring and rubber ring for dust and moisture proof entry of xlpe / pvc armoured cables as below. ( cable size: 4 x 70 sq.mm. ) , finishing the end of following xlpe / pvc armoured cables by crimping method including s&f solderless socket ( dowels make ) tapes, anti corrosive paste & jointing materials. a ) cable size: 4 x 70 sq.mm. b ) 3 x 6 sq.mm. , s&f of m.s. feeder pillar box ( overall approx dimensions 18mm. x 12mm. x 6mm. ) fabricated from 3mm. & 6 mm. thick m.s. plate. , making of valve chamber ( 5½ x 5½ x 4½ ) , s&f of 2.5 sq.mm. copper wire of electric wiring 440 volt.