Which color code represents the ground wire in electrical wiring in the United States?

In electrical wiring systems in the United States, the ground wire is represented by green insulation or can also be bare (uninsulated) copper. This color coding is established to ensure safety and consistency in the identification of wires. The ground wire serves as a critical safety feature, providing a path for electrical fault currents to safely dissipate into the earth, thus reducing the risk of electrical shock or fire.

Understanding this color code is crucial for any electrical work. It helps prevent errors that could result from confusing the grounding wire with other wires such as those used for power (which may be black or red) or neutral (typically white). The clear identification of the ground wire through its designated color ensures that anyone working on or inspecting electrical systems can quickly and easily identify its purpose, further enhancing safety in electrical installations and repairs.