Engineers will be on site in Kettering today to fix problems which caused power cuts affecting about10,000 people over the weekend.
Two unconnected faults led to problems with electricity supplies in the NN15 postcode area although supplies were restored within minutes.
A spokesman for Western Power Distribution said: "We have now located the cause of both faults and our engineers will be on site to carry out a permanent repair. WPD apologises for any inconvenience caused by these faults."
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About 4,500 homes lost power at around 3.11am on Sunday morning but 80 per cent were restored within three minutes and the remaining 500 within 24 minutes.
A second, unrelated, underground cable fault was reported in the Kettering area at 7.56pm that day which caused an interruption to power for 5,508 customers.
Supply was re-routed and power restored to 4,849 homes within nine minutes and the remaining 659 customers were all back on supply within 40 minutes.