In a DC application not DCC using a Peco SL-88 turnout does the main track go dead when the train is on the divergent angle say for a siding or a pulloff with a Peco at either end and the opposite end is still set to the main track.
The Peco SL 88 Insulfrog turnout is 'power routing'. That means that
that track voltage is cut off to the divert track when points are set
for straight, and cut to strait when point is set for divert. This
is true for BOTH DC and DCC. Unless you
desire a 'dead' spur, it is recommended that you use track drops to
your bus from each turnout frog rail. On a 'passing siding' with Pecos at
both ends, the track would be powered if EITHER turnout points are
set to the 'siding''. It would be 'dead' if NEITHER is set to the 'siding'.