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What defines a "interface component" on the 2016 I&T documents?

Question asked by on Feb 27, 2017

Have been using the 2009 I&T documents up until the recent purchase of the 2016 version. Obviously a bit different so trying to understand where all the information goes.  Kinda a noob with fire, mostly experience in all other low voltage, so need all the help I can get.  What defines a "interface component?"