What is the minimum depth requirement for outlet boxes mounted in a wall?

The minimum depth requirement for standard outlet boxes when flush-mounted is stipulated by the National Electrical Code to ensure that there is sufficient space to safely accommodate electrical wiring and devices. A depth of 1.5 inches is necessary to comply with safety and proper installation practices, allowing adequate room for connections and preventing potential overheating or short circuits.

In addition, this depth ensures that the box can be securely fastened to the wall and that the outlet will be at a proper height and alignment for use. It is important to remember that these specifications help maintain the integrity of the electrical system and safeguard against electrical hazards.

Other options may not meet the necessary criteria for flush-mounted boxes. For instance, 1.0 inches or 2.0 inches may not provide sufficient space for the connections or may exceed what's necessary based on the design and requirements. The surface-mounted boxes have different installation considerations and typically do not require the same depth as flush-mounted boxes. Thus, understanding these specific requirements is critical for anyone involved in electrical installations.