supply of signalling cables for laying in knj-lgl section of sealdah division , supply of pvc insulated armoured, unscreened, underground, railway signalling cable (heavy duty) with high conductivity copper conductor of size 12 core x 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 7x1.40mm)with high connectivity circular copper conductor of size: 2 core x 10 sqmm asperspecification. no. irs:s-63/2014 & is 1554 part-1(rev. 4.0) or latest. inspection :rdso. , supply of pvc insulated under- ground railway 6-quad armoured jelly filled cable of 0.9 mm dia. for s&t installation in electrified area as per spec. no. irs:tc- 30/2005 (ver.1), amendment-5, or latest. inspection :rdso