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You hit the nail on the head Ray.  I have been told by an electrical engineer that using wire that is too big can be just as bad as using wire that is too small.  That is exactly what I am trying to avoid.  Why use a larger gauge when it is not necessary?  I am quite familiar with Allan Gartner's DCC wiring website - I have been there many times.  But this time I decided to do my own homework and when I found this table - I was quite surprised to be honest.  I also thought from my previous research that I would need at least 16 gauge wire but the table doesn't lie.  What I am really trying to confirm is that I am reading the table correctly and that most DCC systems are 12V 0-5 amps.
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