What is the requirement for screws entering the wall of a conduit body?

In the context of conduit bodies as described in the National Electrical Code (NEC), the requirement for screws entering the wall of a conduit body is that they must be flush with the conduit body. This specification is important to ensure that the conduit body maintains its integrity and does not create any unsafe conditions that could arise from protruding screws, such as potential damage to wiring or insulation within the conduit body.

When screws extend beyond the flush level, they can create a hindrance in the conduit pathway, potentially obstructing wiring installation or maintenance. Additionally, having screws that are flush helps to minimize the risk of electrical shorts and improve the overall safety of the electrical installation. This requirement reflects a focus on maintaining a smooth and secure conduit installation, aligning with best practices outlined in the NEC.