230.82 Equipment Connected to the Supply Side of Service Disconnect.
Only the following equipment shall be permitted to be connected to the supply side of the service disconnecting means:
(1)Cable limiters or other current-limiting devices.
(2)Meters, meter sockets, or meter disconnect switches nominally rated not in excess of 600 volts, provided all metal housings and service enclosures are grounded.
(3)Instrument transformers (current and voltage), high-impedance shunts, load management devices, and surge arresters.
(4)Taps used only to supply load management devices, circuits for standby power systems, fire pump equipment, and fire and sprinkler alarms, if provided with service equipment and installed in accordance with requirements for service-entrance conductors.
(5)Solar photovoltaic systems, fuel cell systems, or interconnected electric power production sources.
(6)Control circuits for power-operable service disconnecting means, if suitable overcurrent protection and disconnecting means are provided.
(7)Ground-fault protection systems where installed as part of listed equipment, if suitable overcurrent protection and disconnecting means are provided.