The safety ground conductor color is usually colored:

• A. Yellow
• B. Red
• C. Blue
• D. Green

Answer: (D)

Grounding conductors are identified by green insulation (often green with a yellow stripe) so electricians can quickly recognize the safety path that carries fault current back to earth. This clear color coding helps ensure that the grounding path is not confused with hot or neutral conductors, which prevents dangerous mistakes and helps protective devices trip when there’s a fault. Yellow, red, and blue are typically used for other functions such as hot or switch-leg conductors, not for the safety ground. In older setups, bare copper could be used for grounding, but green insulation (or green with yellow stripes) is the standard today.