What should happen when pressing the button on a tester during a GFCI test?

When pressing the button on a tester during a GFCI (Ground Fault Circuit Interrupter) test, the expected result is that the circuit breaker must trip. A GFCI device is designed to protect against electrical shock by monitoring the current flowing in and out of the circuit. If it detects an imbalance, such as when current is leaking to ground, it will automatically cut off power to prevent potential hazards.

When the test button is pressed on a GFCI, it creates an artificial ground fault condition, which should trigger the GFCI to trip, cutting power to the circuit. This mechanism is a critical safety feature, ensuring that the device is functioning correctly and can provide protection in real-world scenarios. The successful tripping of the circuit indicates that the GFCI is operational and can respond appropriately to ground faults.

The other options do not reflect the expected operation of a GFCI test. For instance, if the circuit remains active, that would indicate a malfunction in the GFCI. Similarly, a circuit breaker reading zero voltage does not specifically indicate the testing function, as the GFCI may still be operational without tripping. An indicator light turning green is not a defined standard for testing GFCIs. Therefore, the