If a loco jumps the track and bridges to a parallel track that is
being used with different technology, the resulting intercon-
nection can seriously damage the DCC system, any decoders on
either part of the layout, and even the power pack supplying
DC to the layout.
Schemes that use block selection switches to accomplish the
transition had best be protected, as we did for a bit on the
Flagstaff (AZ) club. There was a box with a two-direction (center
off) switch that provided AC power to the DCC system or the DC
power packs.
Thus there was no way that
both systems could be active
at the same time unless
someone bypassed the switch
and plugged one system
directly into the wall.
Conclusion
So there you are, a dozen
dragons slain. Hopefully, I
explained the “why” behind
the “what” well enough
that you don’t have to take
my contentions purely on
face value. If you found this
“The only safe way to run DC and DCC on
the same layout is not at the same time.
Completely disconnect one before you
connect the other.”
