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Which colors identify an insulated grounded (neutral) conductor under Section 200.6?

White or gray for grounded conductors.

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  1. White or gray ✔
  2. Green or bare
  3. Red or black

Why: Insulated neutrals are identified as white or gray. Green or green with a yellow stripe is reserved for equipment grounding conductors.

Huh, didn't know that: Hot (phase) conductors may not use white, gray or green insulation, since those colors are reserved.

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Two electricians got into an argument that went on for 5 days. They just couldn't find any common ground.
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References

Answer: White or gray. Insulated neutrals are identified as white or gray. Green or green with a yellow stripe is reserved for equipment grounding conductors.

  1. EC&M: Code Q&A, NEC Requirements for Conductor Identification www.ecmweb.com/national-electrical-code/qa/article/21262479/code-qa-nec-requirements-for-conductor-identification
    insulated neutral conductors must be identified as white or gray per Sec. 200.6.
    Checked 2026-10-10.

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