What is the recommended trip current for a GFCI?

The recommended trip current for a Ground Fault Circuit Interrupter (GFCI) is typically in the range of 5 to 7 milliamperes (mA). This level is established to provide effective protection against electrical shocks while ensuring that the device is sensitive enough to detect even small ground faults that could pose a risk to individuals. A trip current in this range strikes a balance between safety and minimizing nuisance tripping during normal operations.

Higher trip currents, such as 10-12 mA or even 15-20 mA, may not provide sufficient protection, as they allow for a greater amount of leakage current before the device activates, increasing the risk of electrical shocks. Conversely, a trip current lower than 5 mA could lead to frequent nuisance tripping, causing inconvenience and potentially leading to complacency regarding electrical safety practices. Therefore, the 5-7 mA range is set as the standard to maximize both safety and practicality in everyday use.