supply of 132 km of underground, armoured, unscreened railway signalling cable size 12 core x 1.5 sq mm and 33 km of pvc insulated multi strand, single core copper conductor as per the details in the tender. , underground, armoured, unscreened railway signaling cable (heavy duty) with high conductivity copper conductor of size 12 core x 1.5 sq mm as per specn. no. irs: s-63/2014 (rev.4.0) with latest amdt. if any and the inspection charges will be borne by vendor , supply of pvc insulated multi strand, single core copper conductor of size 16/0.2 mm (0.5 sq mm) as per is 694:2010 and rdso specn. no. irs: 5-76/89 (amnd-3) or latest. each coil should be of 100/200/500 meters length. colour of the wire which is required will be specified by the engineer in-charge. inspection: (i) rdso/ rites if value of item in work more than 5 lakhs (ii) consignee subject to procurement from rdso approved vendors if value of whole item in work less than 5 lakhs as per extant instructions by railway board.and the inspection charges will be borne by vendor