Metal components that are installed in a run of underground nonmetallic raceway and isolated from possible contact by a minimum cover of ____ to all parts of the metal components are not required to be connected to the grounded system conductor or grounding electrode conductor.

Question

Quizplus · Accepted Answer

The correct answer is 18 inches. This depth provides sufficient isolation for metal components in an underground nonmetallic raceway, ensuring they do not need to be connected to the grounding system, according to standard electrical installation practices and codes.

Metal Components That Are Installed in a Run of Underground