Railway Planning for Outdoor Cable requirement
The requirement of cable conduction is to be determined depending upon the circuits run from CT Room /Relay room function. Separate cable line wise and if necessary, function wise are laid from relay room /CT room to facilitate easy testing of cable without much distraction to the traffic.
Cable size to be determined by keeping spare conductors to a minimum of 20% of total conductors used inn, each cable wiring between the outermost facing point of the station and a minimum of 10% of the total conduction used in the each cable working beyond the points area upto the signals. The approximate cable requirement for a typical four a line station on a double line section and a 3 line station on a single line section.
Type of cable Double line Single line
Signalling cable 24 core 9 kms. 1 kms
Signalling cable 19 core 10.6 kms. 2.4 kms
Signalling cable 12 core 10.5 kms 12.7 kms
Signalling cable 6 core 5.7 kms. 3.3 kms
Power cable 10 Sq 8.6kms. 7.7 kms
Numbering of cable is done in ascending order right hand side of the cable core distribution plan
A cable distribution plan for a 4 line station on a double-line section is attached for reference.