200.10 Identification of Terminals
Exception: Terminal identification shall not be required for devices that have a normal current rating of over 30 amperes, other than polarized attachment plugs and polarized receptacles for attachment plugs as required in 200.10(B).
- Identification shall be by a metal or metal coating that is substantially white or silver in color or by the word "white" or the letter "W" located adjacent to the identified terminal.
- If the terminal is not visible, the conductor entrance hole for the connection shall be colored white or marked with the word "white" or the letter "W."
Informational Note: The color gray may have been used in the past as an ungrounded conductor. Care should be taken when working on existing systems.