Why might a ground fault interrupter (GFI) on a generator trip?

A ground fault interrupter (GFI) is designed to protect against electrical shock by monitoring the current flowing through the electrical circuit. If it detects any imbalance between the outgoing and returning current, which can occur when there is a fault, it will trip to prevent injury or damage.

When the GFI trips due to a problem with the electrical ground, it indicates that there is a leakage of current — possibly due to worn insulation, moisture ingress, or faulty equipment — that poses a risk of electric shock. In such cases, the GFI is performing its intended safety function by disconnecting the power supply, ensuring that both equipment and personnel remain safe from electrical hazards.

This highlights the importance of regularly checking electrical systems for ground integrity and ensuring that any protective devices like GFIs are in proper working order. It is critical to address any grounded issues immediately to maintain safe operation of generators or other electrical equipment.