The listed exposed work cover is permitted to serve as the grounding and bonding means when mounted correctly. What is required for this?

The requirement that the mounting holes of the exposed work cover must be on the flat, non-raised portion of the cover is essential for ensuring effective grounding and bonding. This design promotes a secure connection to the electrical grounding system and minimizes the likelihood of creating a poor electrical connection that could lead to safety hazards.

When the mounting holes are positioned on a flat surface as opposed to a raised or uneven portion, it ensures that the screws or bolts used for installation make full and effective contact with the grounding system. This contact is critical because any air gaps or inconsistencies in the mounting could impair the continuity necessary for proper bonding.

Additionally, placing the fasteners on a flat area helps in maintaining mechanical stability and strength, ensuring that the cover remains securely attached and functions effectively over time. In context, it's important to note that while other factors like the material of the cover or the number of fasteners can contribute to overall installation quality, the specific positioning of the mounting holes is pivotal for grounding and bonding efficiency.