In electrical circuits, the _____ wire protects the operator.

In electrical circuits, the _____ wire protects the operator.

• A. Neutral
• B. Hot
• C. Shielding
• D. Grounding

Answer: (D)

Grounding provides a safe path for fault currents to earth, which keeps exposed metal parts at near-zero potential and allows protective devices (like fuses or breakers) to trip quickly if a fault occurs. This minimizes the chance of a shock if someone touches the equipment. In normal operation, the ground wire doesn’t carry current; instead, the hot wire supplies power and the neutral completes the return path. Shielding serves a different purpose—reducing interference rather than protecting the operator—so it isn’t the feature that guards against shock.

Grounding provides a safe path for fault currents to earth, which keeps exposed metal parts at near-zero potential and allows protective devices (like fuses or breakers) to trip quickly if a fault occurs. This minimizes the chance of a shock if someone touches the equipment. In normal operation, the ground wire doesn’t carry current; instead, the hot wire supplies power and the neutral completes the return path. Shielding serves a different purpose—reducing interference rather than protecting the operator—so it isn’t the feature that guards against shock.