If you don¡¯t mind the DCC voltage sagging a little when a power hungry loco is operating on the siding with longer feed. Wires¡ 22 Ga wires are OK
For 20-30 inch feeders. You could double up on the number of feeder pairs to that track from the larger bus.
The true test is to cause a rail-rail short on that track and make sure the booster or any circuit breaker trips.
DonV