Partyline: Is there a recommended cable list for wiring partyline products? The Clear-Com intercom line is intended to run on one shielded cable pair per intercom channel. One conductor carries audio and the other conductor carries the DC power for Remote Stations. The shield serves as the ground return for the audio and power conductors. When choosing interconnect cable, keep the following considerations in mind: Keep cable runs under 500 feet (150m). The DC resistance of the ground or ...