In residential wiring, what is the typical color coding for a ground wire?

• A. Black
• B. Red
• C. Green or bare
• D. White

Answer: (C)

In residential wiring, the typical color coding for a ground wire is green or bare. This standard is widely recognized and helps ensure safety and consistency in electrical installations. The ground wire is crucial as it provides a path for electrical current to safely return to the ground in the case of a fault. This protects both the electrical system and its users from shock or fire hazards.

Green insulation is used to identify ground wires clearly, while bare wires, which have no insulation, also signify their purpose as a ground. By adhering to this color coding, electricians can easily identify ground conductors amidst other wires, reducing the risk of mistakes during installation, maintenance, or troubleshooting of electrical systems.