Q. I recently saw a service disconnect that was being used as a conduit for two feeder circuits. Is this legal?
A. The requirement in 230.7 states that service conductors shall not be installed in the same raceway or cable with feeder or branch circuit conductors. However, this rule doesn't prohibit the mixing of service, feeder, and branch circuit conductors in the same service equipment enclosure. Therefore, what you described is permitted by the Code.