supply of supply of underground railway signalingsupply of underground railway signaling,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: 2 core x 2.5 sq.mm. conforming to rdso specn. no. irs: s-63/2014 [rev. 4.0] with latest amendments. [ warranty 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: 2 core x 2.5 sq.mm. conforming to rdso specn. no. irs: s-63/2014 [rev. 4.0] with latest amendments. [ warranty period: 30 months after the date of delivery ] ]