All metal sections of continuous rigid cable supports and fittings shall be electrically continuous and effectively grounded to provide a continuous circuit for fault current. A continuous rigid cable support system shall not be used either as a grounded circuit conductor or as an equipment grounding conductor.
(Title 24, Part 3, Section 3-318 - 6.)
Cal. Code Regs. Tit. 8, § 2778
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 18943(c), Health and Safety Code.