I am wiring for DC, but want to keep the option of later converting it to DCC in mind. My layout for discussion purposes is small (appx. 5 ft x 3 ft), and consists of a figure 8 inside of an oval connected by a double cross-over (Shinohara that is insulated all the way across the middle) at one point and a reversing loop at another. All RR switches (Shinohara) have live frogs with slide switches to control polarity and movement of the switch. My intention is to make the figure 8 a block and the oval another block with the insulated double cross-over separating the blocks. For track controls, I plan to use an Atlas reversing section controller and an Atlas block selector. I will connect my A bus line to the A block track in two places and the B bus line to the B block track in two places, and the reversing section track wires will go straight to the reversing controller. At each wire drop from the the track, I intended to connect wires from both sides of the track. Would it be correct to then connect my A bus line negative wire to my B bus line negative wire, and attach the combined negative wires to the common terminal on the reversing selector? If that is OK so far, how do I slide switches that control the frog polarity? Can the + and - frog drop wire (from the slide switch) be connected to the A or B bus line depending which block they are in. I am just not sure about the common wire in all this. Any help would be greatly appreciated. Jim Here is a photo of the double cross-over for clarification:
