What is the preferred method to verify proper equipment grounding in a facility?

What is the preferred method to verify proper equipment grounding in a facility?

• A. Perform a ground continuity check between the equipment frame and earth, and test the ground resistance to ensure it meets the required value.
• B. Visual inspection is sufficient to verify grounding.
• C. Rely on the building's main service grounding alone.
• D. Measure insulation resistance of the power conductors.

Answer: (A)