--- InTramsDownUnder@..., "Ron Besdansky" <rbesdans@...> wrote:

> Some other engineers and I once decided that it would actually be better, from the electrolytic corrosion point of view, for DC railways and tramways to have the overhead NEGATIVE with respect to the rails.


All that would do is shift the location of the damage to the underground services.

Perhaps the polarity could be reversed on a daily basis?

Mal Rowe - whose tongue is firmly in his cheek