ABYC Marine Electrical Practice Exam

What is the preferred color for DC grounded conductors?

1. Red

2. Black

3. Yellow

4. Green

The correct answer is: Yellow

The preferred color for DC grounded conductors is yellow. This color coding is important because it helps to easily identify the function of the conductor in a wiring system, facilitating maintenance and troubleshooting. The use of yellow for grounded conductors aligns with industry standards and guidelines, making it easier for technicians and electricians to follow safety protocols and avoid confusion when working with electrical systems on marine vessels. In a marine environment where multiple electrical systems might be present, having a standardized color—like yellow for grounded conductors—greatly improves the safety and efficiency of electrical work. This clear distinction ensures that everyone working on or around the vessel can quickly recognize the grounded conductors, thereby reducing the risk of accidental shorts, incorrect connections, or other potentially hazardous situations.