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.
- Dimensions: 4" Diameter (Octagon) x 1-1/2" Deep.
- Volume: 15.5 cu. In.
- Material: 1.1mm Galvanized Steel.
- Knockouts: 1/2" (8 Total).
- Max Load: 50 lbs (Fixtures Only).
- Certification: ETL Listed (4009580).






























