Causes
The cause of the outages - which was undetermined for five days - appeared to be the company's decision to continue supplying power to the 400,000 people serviced by twenty-two feeder cables after ten of them had failed, overloading the remaining twelve. After these were repaired, a manhole-to-manhole inspection and repair of smaller cables which had also burned took place. Consolidated Edison was due to make an initial status report, regarding the outage, on August 2, 2006. Data submitted by Con Edison in August, 2006 indicated that the failed feeder cables had been in service an average of 16 years, with the oldest failed cable 59 years old.
Read more about this topic: 2006 Queens Blackout