Quick Answer
Ground Fault Protection Devices (GFPDs) require routine maintenance to ensure they function correctly and provide reliable protection against ground faults.
Inspection and Testing
Inspect GFPDs at least annually, checking for signs of wear, corrosion, or physical damage. Verify that all connections are secure, and that the device is properly installed and calibrated. Test the device at least quarterly, using a 30mA test current, to ensure it trips correctly and reset properly.
Calibration and Adjustment
Calibrate GFPDs at least annually, using a 30mA test current, to ensure accurate operation. Adjust the device’s sensitivity as needed, to prevent nuisance trips. Consider using a calibration certificate to document the process.
Additional Considerations
When working with generators, ensure the grounding system is properly bonded to the neutral. This typically involves a 1/0 AWG grounding cable, connected to a grounding rod driven 8 feet into the earth. Verify the grounding system’s integrity before installing or servicing GFPDs.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.