6 core, 12core, 19core , 24core, 30core with 1.5 sqmm.
Indian Railway Standard Specification: IRS S:63 :2014.
PVC INSULATED UNDERGROUND, UNSCREENED CABLE FOR RAILWAY SIGNALLING.
Railway Signalling Cables
12 C x 1.5 mm
This PVC insulated Underground, Unscreened, Armoured/Unarmoured and PVC sheathed cables covers the requirement for Railway signalling.
‘A’ compound of IS: 5831-84. (General purpose insulation for maximum rated conductor temperature 70° C operation) except for insulation resistance, tensile.
The specific gravity of PVC insulation taken from finished cable shall not exceed 1.42.
The cores of twin three and multi-core cables shall be laid up together with suitable lay .
The outermost layer shall have right hand lay and the successive layers shall be laid with opposite lay .
Galvanised round steel wire to IS: 3975 with exception to tensile strength and percentage elongation.
Galvanised Double Steel Tape to IS: 3975 with exception to tensile strength and percentage elongation
The laid up cores shall be provided with an inner sheath applied by extrusion .
5831-84 except for tensile strength, percentage elongation and shrinkage shall be used for outer sheath