The OCS system uses one messenger wire of 95 square millimeter and two contact wires of 107
square millimeter each supply power to the pantograph of locomotive.
2.
Use grounding cage and the running rail as the current return circuit.
3.
The catenary system shall be supported registered by means of hinged cantilevers attached to the
anchor channel under the tunnel roof or the wall within the tunnel.
There is more security facilities in the underground railway which makes the passengers or property;
more safety and prevent any incident from the railway running.