Electrification
All lines used by SEPTA are electrified with overhead catenary supplying alternating current at 12 kV with a frequency of 25 Hz. The system on the former PRR side is owned and operated by Amtrak, part of the electrification of the Northeast Corridor. The electrification on the RDG side is owned by SEPTA. The Amtrak system was originally built by the PRR between 1915 and 1938. The SEPTA-owned system was originally built by the RDG starting in 1931.
Read more about this topic: SEPTA Regional Rail