Does each GFCI have a test button?

Each Ground Fault Circuit Interrupter (GFCI) is designed with a test button to allow users to verify that the device is functioning correctly. The test button simulates a ground fault condition, which should prompt the GFCI to trip and cut off power. This ensures that the circuit is operational and provides the necessary protection against electrical shocks. Regularly testing the GFCI with this button is an important safety practice, as it helps confirm that the device will respond as intended in the event of an electrical fault.

The other options may be misleading: circuit breaker types are not the only ones with a test button, all GFCIs, regardless of type—be it receptacle, inline, or portable—are equipped with this feature for safety. The notion of GFCIs being automatic suggests they do not require any user interaction to confirm operability, which is incorrect; testing is a proactive safety measure. While it's true that portable GFCIs exist, they are not the only type that includes the test button, making them an incomplete basis for that claim.