According to NEC® regulations, how far can outlet boxes be set back from the finished wall surface?

The correct distance for outlet boxes to be set back from the finished wall surface according to NEC® regulations is 1/4 inch. This specification ensures that the faceplate can properly cover the box while allowing for proper mounting and installation of the electrical device without any gaps that could create safety hazards or compromise the appearance of the installation. Proper box placement is crucial for ensuring that devices are safely and securely mounted in conjunction with the finished wall surfaces.

Regulations such as these are strictly outlined in the NEC to promote safety and standardization in electrical installations, ensuring that all parts fit accurately and that electrical connections are made without excessive strain or exposure.