Duke Energy, the state's largest electric utility, will raise rates in January.
The effect on a typical residential customer will be about $7 a month, but the actual amount will vary by house size and energy usage.
The N.C. Utilities Commission approved the rate increase Tuesday morning. The Charlotte-based power company will phase in the increase over two years. The company will raise rates 3.8 percent in January and raise rates again by 3.2 percent in 2011.




