In a general discussion of panelboard conductors, which statement is true?

• A. Conductors in panelboards may be any color as long as circuits are identified.
• B. Conductors in panelboards must be color-coded according to phase and neutral.
• C. Neutrals may be uncolored if a color-coded ground is used.
• D. All conductors must be green or green with yellow stripe.

Answer: (B)

Color coding is essential for quickly identifying conductor roles and phases in a panelboard. In a typical panel, hot conductors from different phases are given distinct colors so you can tell them apart at a glance, which helps prevent miswiring and makes servicing safer. The neutral is identified with white or gray, and the grounding conductor is green or green with a yellow stripe. This standardized scheme keeps everything clear and reduces the risk of dangerous mistakes when circuits are added, tested, or repaired. So the conductors in panelboards must be color-coded according to phase and neutral. The other ideas—using arbitrary colors, leaving neutrals uncolored if grounds are color-coded, or requiring all conductors to be green—do not align with common electrical practice and code requirements.