Which device is commonly used to reduce electrical shock risk inside a removal area?

• A. Ground fault circuit interrupters (GFCI)
• B. Arc fault circuit interrupters (AFCI)
• C. Electrical fuses
• D. Grounding mats

Answer: (A)

Protecting workers from electrical shock relies on quickly detecting currents leaking to ground and interrupting the circuit. A ground fault circuit interrupter does exactly this by continuously monitoring the hot and neutral currents and tripping within milliseconds when an imbalance is detected, such as when a person provides a path to ground in a damp removal area. That rapid shutoff is what makes it the best choice for reducing shock risk in removal work. Arc fault interrupters focus on preventing fires from arcing, not on stopping shocks. Fuses interrupt overcurrent but do not specifically detect and respond to small ground faults. Grounding mats can help with static control or provide a grounding path, but they do not automatically disconnect power when leakage occurs.