The outage was reported before 9:30 a.m. near California and 17th.
The San Francisco Fire Department was called to the scene and closed all but one lane in both directions near the intersection. The scene has since been cleared and all lanes are back open.
As of 8 p.m. less than 150 PG&E customers were without power after more than 3,000 had power restored.
An equipment failure was blamed for the outage.