What does NEC require regarding the identification of grounded conductors?

The National Electrical Code (NEC) specifies that grounded conductors must be identifiable by their insulation color. According to the code, grounded conductors should be marked with white or gray insulation. This requirement is put in place to ensure safety and clarity in electrical installations, allowing anyone who works with or inspects the electrical system to easily identify these conductors. Proper identification helps to prevent mistakes during installation, maintenance, and troubleshooting, which can lead to hazardous situations if grounded and ungrounded conductors are confused. This color coding is critical for maintaining an organized and safe electrical system.