Factors Which Decides Cross Section of Overhead Contact Wire:
1) Assessment of load current from the consideration of traffic density.
2) Assessment of load current from the consideration of train loading time schedules.
3) Assessment of load current from the consideration of track gradients.
4) Distance apart from feeding point.
5) Consideration of the permissible temperature rise of the contact wire.
6) Voltage drop in contact wire.
7) Expected life of contact wire.
8) Cross section of overhead contact wire is decided taking into the consideration of an overload of 50% for 3 minutes.
9) Resistivity of contact wire.
10) Material used for contact wire.
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