230.7 Other Conductors. in Raceway or Cable.
Conductors other than service conductors shall not be installed in the same service raceway, or service cable, handholes, or underground boxes in which the service conductors are installed.
Exception No. 1: Grounding electrode conductors or supply side bonding jumpers or conductors shall be permitted within service raceways.
Exception No. 2: Load management control conductors having overcurrent protection shall be permitted within service raceways.
