by NHRR WTBY
There has been some discussion on other forums concerning the arrangement of third rail power systems. Several years ago, while riding the London Underground (can't remember which line for sure, but it was likely the Central Line) I noticed that there were not three but four rails. The third rail was outside the main rails as expected, but the fourth ran between the main rails and appeared to be worn on top from a shoe.
Does anyone know how the power system is set up on the London Tube? Was this indeed a power rail?
Does anyone know how the power system is set up on the London Tube? Was this indeed a power rail?