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)]. These rules will probably change with the 2017 NEC, because they are new and because solar continues to grow.
Regardless of source, two rules haven’t changed:
- Identify the grounded conductor per Sec. 200.6. Remember, this is the grounded, not grounding, conduc