high-tension wires/cables etc
From Longman Dictionary of Contemporary Englishhigh-tension wires/cables etchigh-tension wires/cables etcTPEwires etc that have a powerful electric current going through them → high-tensionExamples from the Corpushigh-tension wires/cables etc• Take the walk along the Humber Bridge with the wind nagging the high-tension cables.• The Kinner field almost qualified; it had two sets of high-tension wires on its eastern perimeter.