Wednesday’s power outage on Mercer Island was caused by equipment failure.

The outage occurred just before 10 a.m. initially effecting 150 customers on Mercer Island, largely on the North End.

Once Puget Sound Energy crews were on site they discovered a piece of the electrical equipment had broken. Crews determined the most efficient way to restore power would be to cut off power to the whole circuit, causing a power outage for approximately 1,500 customers on the Island.

Crews had power restored by 1:43 p.m. on Wednesday afternoon.