Editing Overhead power line (section)

{{Short description|Above-ground structure for bulk transfer and distribution of electricity}}
{{About|power lines for general transmission of electrical power|overhead lines used to power road and rail vehicles|Overhead line}}
{{redirect|Power line}}

An '''overhead power line''' is a structure used in [[electric power transmission]] and [[Electric power distribution|distribution]] to transmit electrical energy along large distances. It consists of one or more [[electrical conductor|conductors]] (commonly multiples of three) suspended by [[Transmission tower|towers]] or [[Utility pole|poles]]. Since the surrounding air provides good [[cooling]],   [[electrical insulation|insulation]] along long passages, and allows optical inspection, overhead power lines are generally the lowest-cost method of power transmission for large quantities of electric energy.