Today we rode a train with two overhead wires but no resistor banks. This t rain apparently runs on a three phase supply. Presumably the rails supplied the third "leg" of the supply but how safe is this with AC? Wouldn't the r ails be dangerously live relative to earth?
There were no warning signs and the track was unprotected so it must be saf e but I don't understand how. Can anyone explain? Also, how did the brakin g work?