The invention aims to provide for detecting and locating by reflectometry electrical faults in a network of metal structures able to receive electrical cables and perform the return-current function of these cables. The invention consists in injecting a probe signal into a conductor, associated with the structures, then in analyzing the reflected signal by comparison with a reference signal.
According to one example implementation, an insulated conducting element is held at a distance by fasteners fitted to supports secured to a wall of the metal structure.
Application to raceways in composite-skin aeroplanes.