DCC simplifies wiring considerably – no isolating sections anymore and much easier hidden siding wiring in particular too. However it does move the difficulty to another place – inside the locomotives, which in this scale can be challenging – not the wiring, you just have to solder two wires to the pickups and two to the motor from the decoder keeping the pickups and motor isolated from each other so the decoder can do its job. The difficult bit is space inside the loco bodies!!! The image below shows all the section switches and isolators I would have had before I made the decision to switch to DCC!
Anyway, for layout wiring, the deal is very simple – make everything live. It’s a little more complicated at turnouts of course. All my turnouts are “DCC friendly”, which is a terrible term as the mod works just as well in DC!
Basically it means isolating the frog from the blades and the track beyond the end of the turnout. The blades are then electrically joined to the adjacent stock rails and the frog’s polarity switched using the aux switch on the tortoise slow motion point motors. Easy (with the new peco mainline points) and ensures that an out of gauge wheelset cannot create a short between the blade and stock rail!