100-mile transmission line would bring power to Portland. But there’s a major catch

A private developer wants to build a new transmission line stretching 100 miles from The Dalles to Portland — pitching the ...
T&D

High Voltage AC Transmission Line Design: NESC 5-mA Rule Considerations

The National Electric Safety Code (NESC) includes a clause sometimes referred to as the “5-mA Rule,” which states: For voltages exceeding 98 kV ac to ground, either the clearances shall be increased ...
T&D

Overhead or Underground Transmission? That is (Still) the Question

For years, the electric utility industry has been questioning whether to use overhead or underground systems for transmission of power using high-voltage transmission lines. Issues driving this ...