supply of cable pvc insulatedcable pvc insulated,pvc insulated cable for railway signalling heavy duty under ground unscreened armouned with galvanised round steel wire and the conductor of plain solid annealed high conductivity copper each with nominal cross section area of 2.5 sqmm confo rming to specn.irs. s-63-89 size 2 core x 2.5 sqmm or latest. [ warranty period: 30 months after t he date of delivery ] ] , cable size 2 core x 2.5 sqmm pvc insulated for railway signalling heavy duty un der ground unscreened armouned with galvanised round steel wire and the conductor of plain solid annealed high conductivity copper each with nominal cross section area of 2.5 s qmm conforming to specn.irs. s-63-2007. [ warranty period: 30 months after the date of delivery ] ]