What must be done regarding ground detectors in ungrounded AC systems operating at 120 volts and above?

In ungrounded AC systems operating at 120 volts and above, ground detectors must be connected as close as practicable to the supply source to ensure proper functionality and safety. This placement is crucial because it allows for immediate detection of any ground faults that may occur in the system. By being located near the supply source, the ground detectors can effectively monitor the voltage levels and quickly alert operators to an unplanned ground condition, thereby helping to maintain system integrity and safety.

The strategic positioning enhances the reliability of the system by ensuring that ground detection occurs promptly, which is vital in preventing potential overheating, equipment damage, or electrical shocks. Moreover, adhering to this guideline reflects best practices in electrical installations, contributing to both safety and compliance with relevant standards.