Duke Energy Progress said construction work that accidentally knocked down a power line cut off electric service to as many as 1,100 customers south of downtown on Monday morning.
Power had been restored as of early Monday afternoon.
The company said the outage was reported at 10:39 a.m. By 11 a.m., rerouting power had restored service to all but about 380 customers.
Washington Elementary also lost power around 11:30 a.m., but it was back on by about 12:10 p.m., said Wake schools spokeswoman Lisa Luten.
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The outage area was north of Interstate 40 and south of Martin Luther King Jr. Boulevard and largely in an area between South Wilmington and Fayetteville streets.