four-wire circuit


Also found in: Wikipedia.

four-wire circuit

[′fȯr ‚wīr ′sər·kət]
(communications)
A two-way circuit using two paths so arranged that communication currents are transmitted in one direction only on one path, and in the opposite direction on the other path; the transmission path may or may not employ four wires.
References in periodicals archive ?
A four-wire circuit is designed to offer one pair of wires for sending information and another pair for receiving information.
The concept of instantaneous active and reactive power was first elaborated in Japan in 1982, and has been considerably modified since then for three-phase four-wire circuits, circuits more than three-phase, and power electronics equipment.
544-Mb/s TI/datacom tester as well as an analog transmission impairment tester for two- or four-wire circuits.
A new Permanent Series ground fault circuit interrupter is rated for applications up to 30 A and can be configured for 120-V or 240-V, three- or four-wire circuits.