Home Inspection Electrical Practice Test

What is the primary function of a grounding wire?

1. To increase voltage

2. To prevent electrical shock

3. To conduct electricity

4. To reduce fire hazards

The correct answer is: To prevent electrical shock

The primary function of a grounding wire is to prevent electrical shock by providing a safe path for electric current to flow into the ground in the event of a fault or leakage. Grounding protects individuals from potentially hazardous situations where a fault in the electrical system could cause the casing of an appliance or electrical device to become energized. By ensuring that excess or stray electricity safely dissipates into the ground, grounding wires significantly reduce the risk of electrical shock. While grounding can also contribute to reducing fire hazards and is essential for maintaining overall electrical system stability, its most critical and immediate role is to safeguard people from electrical hazards. Grounding does not increase voltage or conduct electricity in the same manner as a live wire; instead, it serves as a protective measure, ensuring that any harmful electrical energy is redirected safely away from users and structures.