How often should ground-fault protection devices be tested?

Ground-fault protection devices are critical components in ensuring safety in electrical installations, particularly in wet or damp locations like pools and spas. According to the National Electrical Code (NEC) guidelines, these devices should be tested regularly to verify their functionality, as they play a crucial role in preventing electric shock hazards and ensuring the safety of users.

Testing ground-fault protection devices monthly is the recommended frequency. This regular testing helps ensure that any potential issues are identified and rectified before they can lead to dangerous situations. Monthly checks allow for ongoing assurance that the devices will operate correctly when needed, maintaining the safety and reliability of the electrical system in environments where the risk of ground faults is greater.

Testing on a less frequent schedule, such as quarterly or annually, could allow a malfunctioning device to go undetected for too long, potentially endangering users. Thus, monthly testing strikes an appropriate balance, ensuring safety while considering practical aspects of maintenance and monitoring.