What can be installed to help trace an underground circuit or gather stray current?

The installation of a bare ground wire strung on top of the cables or conduit is effective for tracing underground circuits or gathering stray current. When a bare ground wire is laid alongside or above the existing cables, it can serve as a reference point for measuring circuits and detecting stray electrical currents. By connecting the bare ground wire to a measuring device, electricians can more easily identify the path of the circuit and determine whether there are any leaks or issues within the system.

In contrast, insulated wire is designed to prevent electrical conduction and would not be helpful in detecting or tracing current. A signal generator is typically used to introduce a specific signal into a circuit for testing purposes but does not assist in physically tracing existing circuits or picking up stray currents. Coated ground cable, like insulated wire, would also not provide the direct reference needed to trace the circuit effectively since its insulation would prevent unwanted electrical interactions. Thus, the bare ground wire application is the most suitable method in this scenario.