N.C. Gen. Stat. § 9-5
At least 30 days prior to any session or sessions of superior or district court requiring a jury, the clerk of superior court or assistant or deputy clerk shall prepare or have electronically prepared a randomized list of names from the master jury list equal to the number of jurors required for the session or sessions scheduled. The clerk of superior court may decrease the number of randomized names to account for the addition of names of previously selected jurors whose service has been deferred to this session. For each week of a superior court session, the senior resident superior court judge for the district or set of districts as defined in G.S. 7A-41.1(a) in which the county is located shall specify the number of jurors to be drawn. For each week of a district court jury session, the chief district judge of the district court district in which the county is located shall specify the number of jurors to be drawn. Pooling of jurors between or among concurrent sessions of various courts is authorized in the discretion of the senior regular resident superior court judge. When pooling is utilized, the senior regular resident superior court judge, after consultation with the chief district judge when a district court jury is required, shall specify the total number of jurors to be drawn for such concurrent sessions. When grand jurors are needed, at least nine additional names shall be drawn.
The clerk of superior court shall either (i) prepare and issue the summonses or (ii) deliver the printed summonses or the list of names and addresses of jurors to the sheriff, who shall issue the summonses in accordance with the provisions of G.S. 9-10(a). The persons so summoned may serve as jurors in either the superior or the district court, or both, for the week for which summoned. Jurors who serve each week shall be discharged at the close of the weekly session or sessions, unless actually engaged in the trial of a case, and then they shall not be discharged until their service in that case is completed.
N.C. Gen. Stat. § 9-5