N.C. Gen. Stat. § 153A-435
Purchase of insurance pursuant to this subsection waives the county's governmental immunity, to the extent of insurance coverage, for any act or omission occurring in the exercise of a governmental function. Participation in a local government risk pool pursuant to Article 23 of General Statute Chapter 58 shall be deemed to be the purchase of insurance for the purposes of this section. By entering into an insurance contract with the county, an insurer waives any defense based upon the governmental immunity of the county.
If a county uses a funded reserve instead of purchasing insurance against liability for wrongful death, negligence, or intentional damage to personal property, or absolute liability for damage to person or property caused by an act or omission of the county or any of its officers, agents, or employees acting within the scope of their authority and the course of their employment, the county board of commissioners may adopt a resolution that deems the creation of a funded reserve to be the same as the purchase of insurance under this section. Adoption of such a resolution waives the county's governmental immunity only to the extent specified in the board's resolution, but in no event greater than funds available in the funded reserve for the payment of claims.
Despite the purchase of insurance as authorized by subsection (a) of this section, the liability of a county for acts or omissions occurring in the exercise of governmental functions does not attach unless the plaintiff waives the right to have all issues of law or fact relating to insurance in the action determined by a jury. The judge shall hear and determine these issues without resort to a jury, and the jury shall be absent during any motion, argument, testimony, or announcement of findings of fact or conclusions of law relating to these issues unless the defendant requests a jury trial on them.
N.C. Gen. Stat. § 153A-435