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Jim, <br /> <br />While I am not a DCC user, I know some of the basics. DCC power is provided to the entire layout through one or more power supplies. It is kind of like wiring two comon rails instead of one common rail and several 'block' rails. There are some subtleties (sp?) about switches and reversing loops which you will need to talk with someone else about. In addition to track power, a low voltage AC signal is transmitted through the rails and picked up by the engines. The engine with the matching digital code responds and the others ignore the signal. I recommend you get a book on DCC and after you read about it you can answer all our questions. I hesitate to say any more since I have never gone through the mechanics to install one myself. Good Luck - Ed
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