Orbit Industries 4RB-MKO Steel Switch Box 4x4x1.5 in Mko

Product Description

The ORBIT INDUSTRIES 4RB-MKO is a welded steel switch box designed for residential and commercial electrical wiring installations. Constructed from 16-gauge sheet steel, it measures 4 inches by 4 inches by 1.5 inches deep, providing a sturdy enclosure for wiring connections and device mounting. The box includes multiple knockout configurations: two 0.5-inch knockouts and two MKO (multiple knockout) cutouts on the sides, plus three 0.5-inch and two 0.75-inch knockouts on the bottom. Licensed electricians install this box during rough-in wiring to house switches, receptacles, or wire splices behind finished wall and ceiling surfaces.

The 4RB-MKO suits both residential new construction and commercial retrofit wiring projects. Its welded construction provides a rigid enclosure that holds up to the demands of daily trade use. The MKO side knockouts allow flexible conduit entry sizing, making it practical for installations where conduit diameter requirements may vary. This box is appropriate for use in standard stud-framed walls and ceiling assemblies where a square 4-inch electrical box is specified.

Key Features

• 16-gauge sheet steel construction for rigid, durable enclosure
• Welded box design maintains structural integrity under load
• Side knockouts: two 0.5-inch and two MKO cutouts for flexible conduit entry
• Bottom knockouts: three 0.5-inch and two 0.75-inch for multiple conduit configurations
• 4 x 4 x 1.5-inch interior dimensions suit standard square-box device plates and covers
• Suitable for both residential and commercial wiring applications

Compatibility

Designed as an OEM-style replacement or new-installation electrical box compatible with standard 4-inch square box covers, mud rings, and device plates used in residential and commercial electrical rough-in work.

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 any wiring work in or near the box. Ensure all conduit fittings and knockouts are properly secured and that unused knockout openings are closed with approved fillers. Do not exceed the box fill calculations specified by NEC Article 314 for conductors and devices installed in the enclosure.

Technical Specifications

• Material: 16-gauge sheet steel
• Box Dimensions: 4 x 4 x 1.5 inches
• Construction: Welded
• Side Knockouts: Two 0.5-inch, two MKO
• Bottom Knockouts: Three 0.5-inch, two 0.75-inch
• UPC: 835243000827

Standard Information

• Brand: ORBIT INDUSTRIES
• Manufacturer Part Number: 4RB-MKO