(1) Supplied by a Feeder or Branch Circuit
Exception No. 1: For installations made in compliance with previous editions of this Code that permitted such connection, the grounded conductor run with the supply to the building or structure shall be permitted to serve as the ground-fault return path if all of the following requirements continue to be met:
- An equipment grounding conductor is not run with the supply to the building or structure.
- There are no continuous metallic paths bonded to the grounding system in each building or structure involved.
- Ground-fault protection of equipment has not been installed on the supply side of the feeder(s).
Exception No. 2: If system bonding jumpers are installed in accordance with 250.30(A)(1), Exception No. 2, the feeder grounded circuit conductor at the building or structure served shall be connected to the equipment grounding conductors, grounding electrode conductor, and the enclosure for the first disconnecting means.