Why aerial maker ball is used in power lines? All Questions › Category: Transmission And Distribution System › Why aerial maker ball is used in power lines? 0 Vote Up Vote Down chetan shidling asked 4 years ago I need short information. 1 Answers 0 Vote Up Vote Down chetan shidling answered 4 years ago It is used for safety purpose, to make visible of lines to helicopters or airplanes so that they can be aware of lines.