Do I need a permit for ev charger installation in Unincorporated Columbus County?

Most likely yes. Ev charger installation usually requires a permit in North Carolina. Confirm the specifics with Unincorporated Columbus County.

NCGS 160D-1110(a)(4) requires a permit to install or extend electrical wiring, and a new 240-volt circuit is outside the $40,000 exemption because subsection (c)(3) excludes the addition of electrical wiring, devices, appliances, or equipment. The permit and inspections come from your city or county inspections department. The only residential electrical permit exceptions in 160D-1110(a)(4) are like-for-like repair or replacement of light fixtures and devices such as receptacles and switches, and reconnecting a replacement electric water heater, when done by a licensed electrical contractor. Electrical contracting requires a license from the State Board of Examiners of Electrical Contractors (NCGS 87-43). A homeowner working on their own property for their own benefit is exempt only when the property is not intended at the time for rent, lease, or sale (NCGS 87-43.1(5a)). This installation adds a 240-volt circuit or a hardwired charger, or changes the electrical panel. New circuits and panel work are electrical work that normally needs an electrical permit and inspection wherever an electrical permit program exists. A panel upgrade or new service usually also involves your electric utility, which may need to disconnect and reconnect power, so call them early. Many places require a licensed electrician for this work. Where a homeowner may do their own wiring, the permit and inspection still apply.