First, let’s make the distinction between Articles 410 and 411 of the 2011 NEC. Article 410 provides the requirements for installing luminaires, lampholders, lamps ...

With the 2014 NEC, the rules for feeder identification [215.12] are greatly expanded. That’s because the 2014 NEC adds rules for ungrounded feeder conductors supplied by DC systems [215.12(C)(2)].