What is a ground fault?

• A. An intentional path to the ground
• B. An unintended path to the ground
• C. A short circuit to neutral
• D. A fault that increases resistance

Answer: (B)

A ground fault is when current finds an unintended path to the earth. This happens when insulation is damaged, moisture or a faulty connection creates a leakage path, and current can flow from a live conductor to the ground or through a grounded person. Because the current isn’t following the designed return path, it creates a shock hazard, which protection devices like GFCIs are designed to detect and interrupt quickly. The described idea fits: an unintended path to the ground. Other ideas don’t fit as well: an intentional path to ground isn’t a fault, a short circuit to neutral is a direct hot-to-neutral short rather than a leakage to ground, and a fault that increases resistance doesn’t describe leakage to ground.