The initial fault was reported shortly before 11am today in Harlescott to providers Western Power Distribution.
Jim Greaves, a spokesman for the firm, described the fault as "complicated".
He said: "It started as a fault at one customer's house at 10.52am, and in order to enable that repair we had to remove fuses at a substation which caused some of our customers to be cut off.
"We then had to take some more fuses out but subsequently found out the original fault had caused another fault on our main cable, which meant we were unable to get our customers back on as imagined, which meant we had to cut off more of our customers in order to repair the main cable."
All customers were back on by 6pm – except for two who have been out all day, which meant workers have been unable to access their generator.
The power firm apologised for the power cut.