Orbit 4SB-MKO-FB 4 Inch Square Electrical Box 1-1/2 Inch Deep

Product Description

The ORBIT 4SB-MKO-FB is a welded steel square electrical box measuring 4 inches across and 1-1/2 inches deep. Square boxes in this size class serve as the backbone of branch-circuit rough-in work, providing a secure enclosure for wiring connections, splices, and device mounting in both new construction and retrofit applications. The welded construction adds structural integrity, keeping the box rigid during installation and over the life of the installation. Electricians reach for boxes like this when running conduit systems or installing outlets, switches, and junction points behind finished surfaces.

This box is suited for use in residential and light commercial electrical rough-in work. It fits standard 4-inch square configurations, making it compatible with common mud rings, extension rings, and square-to-single-gang or square-to-double-gang plaster rings. Typical installations include wall and ceiling outlet boxes, junction boxes in conduit runs, and device boxes where a low-profile 1-1/2-inch depth is appropriate for the wall or ceiling assembly.

Key Features

• Welded construction for rigid, durable enclosure
• 4-inch square footprint accepts standard mud rings and plaster rings
• 1-1/2-inch depth suits shallow wall and ceiling assemblies
• Designed for conduit-system rough-in and device mounting applications

Compatibility

Designed as an OEM-style replacement and standard-fit square electrical box compatible with 4-inch square mud rings, extension rings, and plaster rings used in residential and light commercial conduit installations.

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 at the panel before beginning work in the junction or device box. Secure the box to framing or structural supports as required by code before pulling conductors. Do not overtighten conduit connectors or knockouts, as this can deform the welded shell.