The 2020 NEC requires that where control conductors share the same enclosure as branch circuit conductors, the color gray will be reserved for the line voltage power conductors. A gray conductor in the control conductor pair will not comply with the new NEC requirement.
Atkore/AFC is Changing the Color Code of the 0-10V Conductors.
![](https://uesrep.com/wp-content/uploads/2022/01/Luminary-Color-Change-2021-12-09-Final-pdf.jpg)