Railway signalling cables from 3 to 56 pairs. Copper conductor of 1 mm2 insulated with solid coloured polyethylene. Stranded into pairs. Cables shielded with a corrugated copper tape and armoured with two steel tape applied helicoidally. Brown UV and chemicals resistant LSZH sheath. This cable is protected against external inductions of the catenary. Used to connect the control centre to the centres of the track equipment. To be installed in conduit or buried along routes electrified at 25000 volts AC.