willygee posted:Dave, if i am not mistaken you are pretty much 3 rail. One tvs per engine. The tvs would be installed across your positive pick roller and the other end of the tvs to your engine ground which shares your outer 2 track rails. The tvs listed above is not polarity sensitive.
Just for clarification - 3 rail is AC so the pick up roller is HOT not POSITIVE. There is no + or -from track voltage.