Gleadless residents were left without power following a substation fire on Thursday evening.
Contingency crews standing in during firefighter strikes attended the blaze on Hollinsend Road at 6.30pm
An electrical fault on the substation equipment was found to be the cause of the fire that was put out within an hour.
As a result of the blaze 192 properties in the area lost power.
Northern Powergrid confirmed power was restored to all properties by 4am on Friday and apologised for any inconvenience caused.