Which NEC article governs the use and identification of conductors, including color coding and identification rules?

• A. Article 110
• B. Article 210
• C. Article 200
• D. Article 230

Answer: (C)

The key idea here is how conductors are used and identified. Article 200 is where the NEC specifies how conductors must be used and identified throughout an installation, including the color coding of insulated conductors and the acceptable methods to identify them. It defines typical color conventions—such as neutral conductors being white or gray and the ordinary insulated conductors being colored for identification—and allows other labeling methods to ensure clear distinction wherever conductors run. This focus differentiates it from other articles that cover different aspects of electrical installations, like general installation requirements, branch circuits, or service conductors. So for rules about color coding and identification of conductors, Article 200 is the applicable section.