supply of op wks stores-jelly filled lightning conductor.-prefabricated get earthing electrode of pipe in pipe technology. two b class is mild steel pipes, one inside the other, hot dip galvanised with 100 micron coating outside and about 300 micron coating inside, filled with high conductor and corrosion resistant crystaline mixture and back fill compound around electrode as per is 3043 / 1987 2 gi pipe 100 mm dia medium grade as per is specification 1239 ( part i ) 1990 isi marked. 3 back fill compound 4 ms earth pit cover of size 30 cm x 30 cm with handles 5 aluminium strip 25 x3 mm of length 9m 6 iron spikes 16 long 7 gi strip 32 x6mm of length 3m 8 gi nipple 20 mm dia and 10 cm long is - 1879 9 gi reducer socket 40 x20mm isi marked 10 lightning terminal copper ball with five nos prong , 15 cm long 11 ms clamp 25 x 3mm with nut and bolt complete 12 gi wire 12 gauge conforming to is 2062 / 1991 13 earth augur ( one per five lc ) 14 pvc pipe 3m long 6 dia 15 user manual 16 tester set ( meger ) for carrying out serviceability check along with manual ( one per five lc ) 17 gi pipe 40 mm dia 6 mtr long medium grade with one socket nipple as per is specification 1239 ( part -i ) 1990. 18 supply of cement opc 43 grade ( isi mark ) confirming to is- 8112 ( 2013 ) , in bags of 50 kg each. the cement sample will be sent to command testing laboratory and should meet all the requisite parameters of is code. 19 natural sand confirming to is 383-1997 ( specifications for coarse and fine aggregates. free from adherent coating, hard, durable, clean and shall not contain clay and impurities such iron pyrites, alkalies, salt, coal, mica, shale or similar laminates or other materials exceeding the specified limits in is code aggregates for concrete. 20 aggregate 20mm. stone aggregate to be crushed rock or gravel 20mm graded confirming to is 383-1997 ( second revision ) and shall consist or angular fragments and shall be clean, hard, tough, durable and of uniform quality throughout. stone aggregate 20 mm conforming to is 383-1997. 21 ms pipe 40 mm bore, 2m long as per is : 1239 22 50 mm bore ms pipe sleeve 23 crystalline conductive mixture ( ccm )