ground-return

Updated: May 21, 2025

By this means the current passes from the wire down the conductor connected with the trolley pole, thence through the motors placed below the body of the car, and from them, through the track or ground-return, back to the power station. A small portion of the current is employed for lighting the electric lamps in the car. In some systems an underground trolley is employed.

John Lord - Beacon Lights of History, Volume 14 : The New Era; A Supplementary Volume, by Recent Writers, as Set Forth in the Preface and Table of Contents