Cal. Code Regs. tit. 8, § 2500.23
(a) A conductor of a flexible cord or cable that is used as a grounded conductor or an equipment grounding conductor shall have a continuous identifying marker readily distinguishing it from the other conductor or conductors.
(1) Conductors having a continuous green color or a continuous green color with one or more yellow stripes shall not be used for other than grounding purposes. The identifying marker shall consist of one of the methods in (A) or (B) below:
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Editorial correction filed 11-2-83 (Register 83, No. 45).
2. Amendment filed 8-27-86; effective thirtieth day thereafter (Register 86, No. 37).
3. Amendment of section heading, section and Note filed 5-5-2008; operative 5-5-2008. Submitted to OAL for printing only pursuant to Labor Code 142.3(a)(3) (Register 2008, No. 19).