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Wiring A Dual DC/DCC Wye

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TwinStar:
My Dallas Union Terminal Module set as most of you know is designed electrically to use both fixed DC and DCC. My use of Dallee dual current detectors allow it to have the signal system, MSS, work in either configuration. The issue now is wiring a wye. I just laid the Kelly lead turnout (this was the name of the mainline turnout that lead to the wye on the north end) and will soon begin laying the rest of the wye and the electrical side of things have become a concern.

The wye is electrically isolated for current detection purposes (the mainlines are detected) and each turnout is Tortoise powered. I thought I had a simple solution but it just moved the reversing section.

I know there are others here more electrically gifted than myself. Thanks in advance.

TwinStar:
The coffee is starting to kick in. Couldn't I isolate the tail section, turnout included, and wire the entire thing off the Tortoise just like the frog? This way with the switch lined properly for either leg the wiring polarity would be correct.

Alan:
Is this the wye?

TwinStar:
Yes, 'southeast' corner of that pic.

Alan:
Well, depending upon the level of protection you want, you should align the entire wye polarity to the turnout on the main that is thrown reverse. That means preventing one main turnout from being thrown reverse if the other main turnout is already reverse.

Controlling polarity by the wye frog alone means the wye would always be correct for one main turnout and incorrect for the other. An engine entering the wye with the wye turnout thrown against it would cause a short.

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