Ground continuity monitors are a means to provide protection to workers as part of Occupational Safety and Health Administration (OSHA) regulations.
These inspections are required by the OSHA regulation on “receptacles which are not a part of the permanent wiring of the building”.
[3] As discussed earlier, the permanent wiring of a building might not be established during the early stages of a construction site and therefore would necessitate some assurance of ground protection.
See main article: Residual Current Device A basic summary of the cord mounted GCM involves a conductor path from the energized conductor (“hot” or black wire) directly through a low-current LED and through the ground wire.
Portable ground continuity testers have similar arrangements but generally provide a much broader range of testing options for electrical circuits.