According to NEC guidelines, a No. 1 isolated conductor must be identified using which color?

According to the NEC (National Electrical Code) guidelines, an isolated conductor must be properly identified to ensure safe and consistent electrical practices. The correct color for identifying a No. 1 isolated conductor is orange. This identification helps in distinguishing the isolated conductors from other types of conductors used within electrical systems.

Using a specific color, such as orange for this purpose, is crucial as it enhances safety by preventing confusion during installation or maintenance work. The use of standard color coding for electrical conductors is a fundamental practice that helps ensure that anyone working on or interacting with electrical systems can readily recognize the function of each conductor, thereby reducing the risk of accidents or incorrect connections.