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)].

Article 210 provides the general requirements for branch circuits not over 1,000VAC or 1,500VDC. These include requirements for conductor sizing, overcurrent protection, identification, GFCI and AFCI ...