Orbit Industries 4SB-50/75-FB 4in Square Box Fb Bracket

Product DescriptionThe ORBIT INDUSTRIES 4SB-50/75-FB is a 4 inch square (4S) welded steel electrical box designed for standard rough-in wiring installations. The box measures 4 inches square with a 1.5 inch depth and ships with a flat bracket (FB) already welded in place, eliminating a separate fastening step on the job. Pre-punched knockouts accept both 1/2 inch and 3/4 inch conduit fittings, making it compatible with the most common EMT and rigid conduit sizes used in commercial and residential electrical work. Licensed electricians install this box during rough-in to house device, outlet, or junction wiring in conduit-fed systems.This box is suited for commercial and residential new-construction framing applications where a 4 inch square box is specified. The welded FB bracket mounts directly to framing members or structural supports, keeping the box plumb and secure before drywall. The dual knockout sizing 1/2 inch and 3/4 inch supports flexible conduit routing without requiring a knockout punch on site. It is commonly used by electrical contractors running EMT through commercial tenant improvements, light industrial builds, and multi-family residential projects.Key Features4 inch square (4S) box profile standard size for commercial device and junction applications1.5 inch depth provides adequate wiring space for most device or junction configurationsWelded FB (flat bracket) eliminates separate bracket installation during rough-inPre-punched 1/2 inch and 3/4 inch knockouts accommodate the two most common EMT conduit sizesWelded steel construction for rigid, stable mounting in framed assembliesCompatibilityDesigned as an OEM-style replacement and standard-fit option for 4 inch square electrical box applications requiring a welded flat bracket and dual knockout sizing in 1/2 inch and 3/4 inch conduit entries.Installation NotesInstallation should be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize all circuits in the work area before making any wiring connections. Secure the welded FB bracket to the framing member so the box face sits flush with the finished wall or ceiling surface. Use listed conduit fittings sized to match the knockout openings do not over-ream or force-fit fittings into knockouts.Technical SpecificationsBox Shape: 4 inch Square (4S)Depth: 1.5 inchesKnockout Sizes: 1/2 inch and 3/4 inchBracket Type: FB (Flat Bracket), weldedConstruction: Welded steelStandard InformationBrand: ORBIT INDUSTRIESManufacturer Part Number: 4SB-50/75-FB