4″ Octagon Junction Box, Galvanized Steel Ceiling Box

Create a secure anchor for your lighting designs with this standard 4-inch Octagon Junction Box. Precision-drawn from 1.1mm galvanized steel, this 15.5 cubic inch enclosure is the industry workhorse for surface-mounted light fixtures, sconces, and smoke detectors. Its 1-1/2" depth provides ample room for wire splices while fitting neatly into standard ceiling joist bays or wall cavities. Engineered with eight 1/2" knockouts for versatile conduit entry, it supports fixtures up to 50 lbs. Fully ETL Listed (4009580) for code-compliant residential and commercial wiring.