Reply to "Lamp Wiring - Wire colors for hot and common"

Red is normally "hot" and variable for new Lionel equipment. (Some units were built out of phase; again assuming bites)

It doesn't even apply to the old stuff though #1, #2, #3, A, B, C, D, & U

And U might be common or hot depending on a single or muti-throttle unit.

Some used U as the common, some used U as the varible.

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