The Use of Insulated Ground Wires on a Transmission Line for Communication Channels

The need for additional reliable communication services in connection with a power transmission system has prompted a study into the use of carrier superimposed upon "ground wires" which are insulated at the points of suspension. This removes the communication channels from the power-carrying conductors and provides a more economical application, with greater potential capacity. This paper presents the design details for such construction and the tests for determining the characteristics, both for carrier and 60 cycles.