North Carolina's Attorney General asked state utility regulators to stop Duke Energy from collecting a 7.2 percent rate increase, which has been in effect for four months.
Earlier this month the N.C. Supreme Court ruled Duke's rate increase is not valid because the N.C. Utilities Commission approved it without considering its economic impact on the public.
The Utilities Commission will have to review the case and issue a new order. Meanwhile, AG Roy Cooper told the Utilities Commission the rate increase should be cancelled.
The N.C. Supreme Court ruling was in response to a legal challenge filed by the AG's office.
The rate increase is costing a typical residential customer about $7 a month.