What is the maximum distance for screw penetration within a junction box wall adjacent to a cabinet?

The maximum distance for screw penetration into the wall of a junction box adjacent to a cabinet is specified as 3/8 inch. This standard is vital for ensuring that screws do not penetrate too deeply, which could potentially damage internal components, such as wiring or devices housed within the junction box. By limiting the penetration to this depth, the risk of compromising the performance and safety of the electrical system is minimized. The specification helps maintain a safe barrier between the screws and the internal electrical connections, thereby adhering to the safety principles outlined in the National Electrical Code. Understanding this guideline is crucial for electricians to ensure compliance with NEC standards and to avoid inadvertent damage during installation or maintenance.