scope:

This publication covers guidelines for selection and installation of general purpose and specialty metallic, nonmetallic, and composite outlet boxes such as: device boxes, boxes for luminaires or other products, and junction boxes; extension rings; covers; and flush-device cover plates. The boxes addressed in these guidelines are intended for use in ordinary, non-hazardous locations. With the exception of masonry boxes and some multi-gang boxes and floor boxes, the boxes addressed in these guidelines are limited to 1650 cm³ (100 in³) internal volume per gang.