What color should the service conductor with the higher phase voltage to ground be marked?

In electrical installations, particularly when adhering to the National Electrical Code (NEC) and Ohio’s specific regulations, the correct color coding for service conductors is crucial for safety and clarity in identification. The service conductor that has the higher phase voltage to ground is marked in orange.

Color coding is implemented to help electricians, technicians, and maintenance personnel quickly identify conductors and understand their functions. The use of orange signifies that this particular conductor carries the higher voltage, which is important for ensuring proper connections and preventing errors during installation or repair work. Adhering to this color code also helps in maintaining safety standards, as workers can immediately recognize the potential hazards associated with handling conductors of differing voltages.

Understanding the significance of each color in the NEC system helps in promoting safety and efficiency on the job. In this context, orange serves a specific purpose, differentiating it from other colors used for different voltage levels or phases, thereby providing a clear visual cue for those working with or around electrical systems.