What color identifies the bonding screw at the main electrical panel?

The color that identifies the bonding screw at the main electrical panel is green. This standard is part of the National Electrical Code (NEC) guidelines, which specify that green is used for grounding and bonding applications. The bonding screw plays a crucial role in ensuring that the electrical system is safely grounded, helping to prevent electric shock and ensuring that all grounded parts of the system are at the same electrical potential.

Using green for the bonding screw allows inspectors, electricians, and other professionals to easily identify its function, promoting safety and adherence to electrical codes. Other colors, like red, black, and blue, have different coding and purposes within electrical systems, often being used for different conductors or phases of wiring but not for grounding or bonding. This consistent color-coding helps maintain clarity and safety in electrical installations.