supply of supply of underground railway signaling cable unscreened pvc insulated, pvc inner sheathed, armoured and pvc outer jacket with high conductivity, annealed copper conductor, size: 12 core x 1.5 sq.mm. conforming to rdso specn. no. irs: s-63/2014 [rev. 4.0] with latest amendments.supply of underground railway signaling cable unscreened pvc insulated, pvc inner sheathed, armoured and pvc outer jacket with high conductivity, annealed copper conductor, size: 12 core x 1.5 sq.mm. conforming to rdso specn. no. irs: s-63/2014 [rev. 4.0] with latest amendments.,supply of underground railway signaling cable unscreened pvc insulated, pvc inner sheathed, armoured and pvc outer jacket with high condu ctivity, annealed copper conductor, size: 12 core x 1.5 sq.mm. conforming to rdso specn. no. irs: s-63/2014 [rev. 4.0] with latest amendments. [ warrant y period: 30 months after the date of delivery ] ] , supply of underground railway signaling cable unscreened pvc insulated, pvc inner sheathed, armoured and pvc outer jacket with high condu ctivity, annealed copper conductor, size: 12 core x 1.5 sq.mm. conforming to rdso specn. no. irs: s-63/2014 [rev. 4.0] with latest amendments. [ warrant y period: 30 months after the date of delivery ] ]