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Power Group Details Blackout Stresses

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Power Group Details Blackout Stresses

Power Group Details Blackout Stresses

Power Group Details Blackout Stresses

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  • <iframe src="https://www.npr.org/player/embed/1516880/1516881" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

The Electric Power Research Institute suggests that a massive power outage in August was caused by more than poorly pruned trees. The industry-funded group says there were unusual stresses on the power grid in the hours before high-tension lines in Ohio sagged into trees and shorted out. NPR's David Kestenbaum reports.