In the early1950s in the United States, the Federal Aviation Administration (FAA) began writing its advisories for power line markers both for air traffic and for low-hanging lines across rivers. In ...

The diameter of the balls must be at least 36 inches on wires that cross canyons, lakes, and rivers, but the FAA allows 20-inch spheres on power lines fewer than 50 feet above ground level and ...

The marker balls are placed on power lines to make the conductor crossings visible to aircraft. ... The Federal Aviation Administration requires colored marker balls in specific situations.

As more transmission lines are being built keep up with the demand for electricity and to move renewable energy, utilities are looking at what is available in power line markers and airway lighting.

YORBA LINDA, Calif. (KABC) -- Southern California Edison helicopter pilots and linemen in Orange County on Thursday installed colorful plastic marker balls to make suspended power lines more ...

Marker balls on power lines save lives. Aug 7, 2016 Aug 7, 2016 Updated Aug 9, 2016; Facebook; Twitter; WhatsApp; SMS; Email; Marker balls hang from power lines. Contributed photo.

SA Power Networks had installed its own markers on powerlines near the Merriton crash for its own inspections. (Supplied: ATSB, SA Power Networks)Queensland electricity company Energex runs the ...

The Virginian-Pilot CHESAPEAKE -- Dominion Virginia Power officials have added orange reflectors to power lines that stretch across St. Julien's Creek and will put a sign near the lines to warn ...