Article 200 covers the use, identification, and terminal requirements for grounded conductors in electrical installations.It explains how grounded conductors are to be identified and connected, including requirements for conductor colors, markings, terminal identification, and when a conductor can or cannot be used as a grounded conductor.The article is especially important when working with neutral conductors, because it establishes the rules that help distinguish grounded conductors from ungrounded conductors and equipment grounding conductors.