Supply of Supply Of U/G Signaling Cable Conforming To Specification No Irs Spec. No S- 63/2014, Rev-4 Or Latest. Pvc Insulated Armoured, Unscreened Underground Railway Signaling Cable Aluminum Conductor Size 02 Core X 25 Sq.Mm To Rdso Specification No.Irs: S-63/2014, And Is-1554Part-1Rev 4.0 Or Latest..