North Carolina regulators have scheduled their expert-witness hearing on Duke Energy Carolinas’ proposed three-year, 16.7% rate increase for Aug. 21 in Raleigh. Hearings for public comment are set for June and July. North Carolina regulators have scheduled their expert-witness hearing on Duke Energy Carolinas’ proposed three-year, 16.7% rate increase for Aug. 21 in Raleigh. Hearings for public comment are set for June and July. Read MoreCharlotte Business News – Local Charlotte News | Charlotte Business Journal