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

Product Description

The ORBIT INDUSTRIES 4SDB-50/75-FB is a 4-inch square (4S) deep electrical box welded with a flat bar (FB) bracket, designed for use in commercial and residential electrical rough-in applications. The box measures 4 inches square with a depth of 2.125 inches, providing ample interior volume for device wiring and splices. It ships with both 1/2-inch and 3/4-inch knockouts (KO), giving installers flexibility when routing conduit or cable. The welded construction delivers rigid, code-ready mounting in new-work framing installations where a bracket-mounted deep box is required.

This box is suited for standard electrical rough-in work in wood-frame walls and ceilings. The FB (flat bar) bracket allows the box to be secured directly to framing members, making it a common choice on commercial tenant improvement jobs, residential new construction, and light industrial work. The dual KO sizes support a range of conduit types and trade sizes, reducing the need for additional fittings or adapters on the job.

Key Features

• 4 inches square profile matches standard 4S device ring and cover compatibility
• 2.125-inch depth provides increased wire capacity for multi-conductor applications
• Welded steel construction for structural rigidity in permanent installations
• Includes both 1/2-inch and 3/4-inch knockouts for flexible conduit entry
• FB bracket design for direct attachment to wood or metal framing members

Compatibility

Designed as an OEM-style replacement and standard rough-in fitting compatible with 4-inch square electrical box covers, mud rings, and device rings used in commercial and residential electrical systems.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize all circuits in the work area before mounting or wiring the box. Secure the FB bracket firmly to framing before pulling wire to prevent box movement during rough inspection. Do not exceed the box fill calculations required by NEC Article 314 for the conductors and devices being installed.

Technical Specifications

• Box Shape: 4 inches Square (4S)
• Box Depth: 2.125 inches
• Knockout Sizes: 1/2 inch and 3/4 inch
• Bracket Type: Flat Bar (FB)
• Construction: Welded steel

Standard Information

• Brand: ORBIT INDUSTRIES
• Manufacturer Part Number: 4SDB-50/75-FB