https://blog.model-train-help.com/2009/09/dcc-ac-and-dc.html?utm_source=rss&utm_medium=rss&utm_campaign=dcc-ac-and-dc Model railroads and model trains Mon, 26 Nov 2012 00:49:29 +0000 hourly 1 https://wordpress.org/?v=6.9.4 https://blog.model-train-help.com/2009/09/dcc-ac-and-dc.html#comment-427 Fri, 18 Sep 2009 13:51:00 +0000 http://68.171.208.138/~blogmode/2009/09/dcc-ac-and-dc.html#comment-427 Yes, polarity does matter and if you have a reverse loop, it needs to be insulated from the rest of the layout and you need to have some kind of a reverse loop relay to adjust the polarity when the loco enters and exits the reverse loop. I found one on the internet for $40 or so and it works quite nicely.(Don’t remember the brand)

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