What is a reverse loop and can someone define the difference between the two insulfrog vs electrofrog?
You can either use a turnout which has a non-powered frog, like the Peco Isulfrog or you can cut gaps in the rail just behind the turnout on the side track. You would then run two wires from your transformer through a double pole, double throw (DPDT) switch. The wires from the DPDT switch would then be soldered, one to each rail, on the side track. You would flip the switch one way to provide power to the side track and the other way to cut power to the side track. If you go to DCC, you would then leave the track powered all the time since the locomotive control will come from the DCC power center rather than the turnout.
OK, I guess I misunderstood. If you just want to spot trains on that siding and not run anything there, the Insulforg turnout is all you need since lining the switch for the main will shut off power to the siding. If you want to have trains moving on both tracks you will need two transformers, with the wires from one connected to the siding track right behind the turnout. You won't need a DPDT switch because the second transformer will act as a a switch when you have it on or off.
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