GFCI protection devices are required in locations where workers may contact water or conductive liquids.

• A. In dry locations only
• B. Everywhere
• C. In job locations where water or conductive liquids may occur
• D. Only outdoors

Answer: (C)

GFCI protection is about stopping electric shock by sensing even tiny leakage current to ground and cutting power fast. When water or conductive liquids are present, the opportunity for current to travel through a person to ground increases, so the risk is higher. A GFCI monitors the current in the hot and neutral paths and trips when it detects an imbalance (typically around 5 mA), usually within a fraction of a second. That quick response can prevent a fatal shock in moist environments.

Therefore, protection is required in job locations where water or conductive liquids may occur, because moisture creates the real hazard. Dry locations aren’t the only concern, and outdoor-only or universal coverage descriptions are too broad or narrow for practical safety expectations.