A total of 586 homes have been left without power in the NN1 area of town today (Wednesday).
Western Power Distribution (WPD) has confirmed a high voltage cable has been damaged in Towcester Road, leaving hundreds of properties without power.
The power cut happened at around 11.30am.
A spokesman for WPD said: "A third party has gone through one of our high voltage cables.
"We have restored 200 properties so far. Our engineers are on site and we're hoping to restore the remaining 386 within the hour."
Power is expected to be restored by 1pm.