Class A GFCI devices typically trip when a ground-fault occurs between what range in milliamperes?

Class A Ground Fault Circuit Interrupter (GFCI) devices are designed to provide protection against ground faults that can pose electric shock hazards. The specific range of trip current for Class A devices is between 4 to 6 milliamperes. This range is effective for quickly interrupting the circuit when a fault is detected, thus minimizing the risk of severe electrical shocks. The sensitivity of these devices to lower currents, such as the 4 to 6 milliampere range, ensures that they can respond rapidly to potentially dangerous conditions, making them suitable for use in environments like homes and workplaces where users may be in contact with water or damp conditions.

The other ranges mentioned do not align with the Class A specifications. While lower trip currents would enhance safety, a range higher than 6 milliamperes could lead to a delayed response or even a failure to trip in the presence of dangerous leakage currents, increasing the risk of electrical hazards. Hence, the correct answer reflects the established safety standard that Class A GFCIs are built to adhere to, ensuring effective protection for users.