Metal Components That Are Installed in a Run of Underground

question 2

Multiple Choice

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.

• A) 11 inches
• B) 13 inches
• C) 18 inches
• D) 25 inches

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