Regarding the picture. The rails carry the track circuit which, if it is an impulse track can carry a high voltage. Water and electricity don't mix! I can also see a post to the right of the picture, I don't know if this is the overhead line which carries 25KV. The rails also return this voltage to the sub-station.

Last edited by BobtheTrain; 09/05/14 09:46 PM.
Best Regards
Lang may yer lum reek