N.C. Gen. Stat. § 15-188
In accordance with G.S. 15-187, the mode of executing a death sentence must in every case be by administering to the convict or felon an intravenous injection of a substance or substances in a lethal quantity sufficient to cause death and until the person is dead, and that procedure shall be determined by the Secretary of the Department of Adult Correction, who shall ensure compliance with the federal and State constitutions; and when any person, convict or felon shall be sentenced by any court of the State having competent jurisdiction to be so executed, the punishment shall only be inflicted within a permanent death chamber which the superintendent of the State penitentiary is hereby authorized and directed to provide within the walls of the North Carolina penitentiary at Raleigh, North Carolina. The superintendent of the State penitentiary shall also cause to be provided, in conformity with this Article, the necessary appliances for the infliction of the punishment of death and qualified personnel to set up and prepare the injection, administer the preinjections, insert the IV catheter, and to perform other tasks required for this procedure in accordance with the requirements of this Article.
N.C. Gen. Stat. § 15-188