supply of pvc insulated armoured, unscreened, underground, railway signalling cables (heavy duty) with high conductivity copper conductor , supply of pvc. heading , supply of pvc insulated armoured, unscreened, underground railway signalling cable (heavy duty) with high conductivity copper conductor of size size12core*1.5 sq.mm, conforming to specification no. (irs:s-63/2014)(rev.4.0) or latest. inspection: rdso , underground, armoured, unscreened, railway power cable(standard 7*1.40mm) with high connectivity circular copper conductor of size:2core*10 sq.mm as per specification no.(irs:s-63/2014 & is 1554 part-1(rev.4.0)or latest. inspection : rdso , supply of pvc insulated underground railway 6-quad armoured jelly filled cable of 0.9mm dia.for s&t installation in electrified area as per spec no.irs:tc-30/2005(ver.1), amendment-5 or latest. inspection : rdso