Which color is used to identify the equipment grounding conductor in most branch circuits?

• A. Red
• B. Blue
• C. Green or bare copper
• D. Yellow

Answer: (C)

The main concept tested is color identification of the equipment grounding conductor. In most branch circuits, the equipment grounding conductor is identified by green, or by being bare copper. This color standard helps technicians quickly recognize the safety path that carries fault current back to the source, reducing shock risk and ensuring that metal enclosures and devices are bonded to earth. Green is the standard color for grounding conductors, and bare copper is commonly used as well since it is typically not insulated. The other colors listed are generally used for hot conductors or travelers in multiwire or switch configurations, not for the grounding path. So green or bare copper is the correct identification for the equipment grounding conductor.