Allied Moulded Sb-1 Adjustable Depth Switch/outlet Box, 23 Cu. In.

The Allied Moulded SB-1 is an adjustable-depth electrical box designed for switch and receptacle installations in both new and existing wall and ceiling applications. Molded from engineering-grade non-metallic thermoplastic, this single-gang box solves the challenge of accommodating varying substrate thicknesses without removing or relocating mounting screws. Its innovative slider plate system and internal rail guides make it ideal for retrofit projects, old work cut-ins, and new construction where precision and flexibility are essential.

Whether you're upgrading an existing electrical system or wiring a new project, the SB-1 simplifies installation by allowing easy repositioning to match wall and ceiling depths. The square corner design facilitates clean, accurate wall openings, and the molded spline device holes speed up device screw installation. With UL listing for 2-hour fire-resistive walls and ceilings, this box meets safety standards for demanding applications.

Features and Benefits

• Adjustable Depth Design: Accommodates wall substrates from 1/2 inch to 1-3/8 inches thick and ceiling substrates from 1/2 inch to 1-5/32 inches without requiring removal or relocation of mounting hardware.
• Non-Metallic Thermoplastic Construction: Engineered molded material built to withstand the demands of electrical installations.
• Square Corner Design: Simplifies wall cut-in for old work applications, enabling faster, cleaner openings in existing walls.
• Smooth Slider Mechanism: Internal rails guide the slider plate in a straight motion for consistent, reliable repositioning.
• Quick Device Installation: Molded spline device holes streamline device screw installation, reducing setup time.
• Fire Safety Rating: UL listed for 2-hour fire-resistive walls and ceilings, providing essential protection and code compliance.

Specifications

• Brand: Allied Moulded
• Model: SB-1
• Configuration: 1-gang, 2-outlet, 1-knockout
• Volume: 23 cubic inches
• Knockout Size: 1/2 inch
• Material: Engineering-grade non-metallic thermoplastic (beige PVC)
• Color: Beige
• Dimensions: 3-9/16 inches deep × 2-1/4 inches wide × 3-3/4 inches high
• Wall Substrate Compatibility: 1/2 inch to 1-3/8 inches thick
• Ceiling Substrate Compatibility: 1/2 inch to 1-5/32 inches thick
• Hardware: Internal steel stud and wood screws included
• Rating: UL listed for 2-hour fire-resistive walls and ceilings