Which statement is true about GFCI testing?

Which statement is true about GFCI testing?

• A. The device's ability to detect ground faults.
• B. The voltage rating of the outlet.
• C. The thermal protection of the device.
• D. The insulation color code.

Answer: (A)

Testing a GFCI is about confirming its ability to detect ground faults and trip quickly to prevent shocks. When you press the built-in TEST button, a small leakage path to ground creates an imbalance between the current flowing in the hot and returning on the neutral. The GFCI senses that leakage and opens the circuit, cutting power. If it doesn’t trip, the protective sensing function isn’t working and needs service. The voltage rating, thermal protection, and insulation color code aren’t what this test checks—they’re separate aspects of the device or installation. Use the TEST button after installation and after any reset to verify ongoing protection.

Testing a GFCI is about confirming its ability to detect ground faults and trip quickly to prevent shocks. When you press the built-in TEST button, a small leakage path to ground creates an imbalance between the current flowing in the hot and returning on the neutral. The GFCI senses that leakage and opens the circuit, cutting power. If it doesn’t trip, the protective sensing function isn’t working and needs service. The voltage rating, thermal protection, and insulation color code aren’t what this test checks—they’re separate aspects of the device or installation. Use the TEST button after installation and after any reset to verify ongoing protection.