Southwire 52151-SWB-UPC Steel Square Electrical Box 4x4

Product Description

The SOUTHWIRE 52151-SWB-UPC is a bracket-mount, welded steel square electrical box measuring 4 inches x 4 inches, designed for distributing power to multiple electrical devices where conductors split into two or more directions. Built for commercial and residential rough-in work, the box features combination knockouts that allow greater wiring flexibility when routing multiple circuit runs. It is UL listed and RoHS compliant, making it suitable for projects that require verified safety standards. Electricians and electrical contractors install this box during rough-in stages in walls, ceilings, and junction applications.

This square box is well suited for standard residential and light commercial electrical installations where branch circuits need to be split or distributed at a single point. The bracket-mount design supports direct mounting to structural framing or backing. The combination knockouts accept common trade conduit fittings and wiring methods, reducing the need for additional knockout adapters on the job site. Compatible Phillips/Slotted combination screw heads streamline cover and device installation.

Key Features

• Welded steel construction provides a rigid, durable enclosure for junction and distribution applications
• Combination knockouts offer flexible conduit and cable entry from multiple directions
• Bracket-mount design supports secure attachment to framing and backing
• Compatible with combination Phillips/Slotted screw heads for faster cover installation
• UL listed and RoHS compliant for use on code-required commercial and residential projects

Compatibility

Designed as an OEM-style replacement and standard rough-in solution for residential and light commercial electrical junction and device-box applications requiring a 4-inch x 4-inch square box form factor.

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 area. Secure the bracket mount firmly to structural framing before pulling conductors. Do not exceed the box fill capacity as calculated per NEC Article 314.

Technical Specifications

• Box Size: 4 inches x 4 inches
• Mount Type: Bracket Mount
• Material: Welded Steel
• Weight: 0.821 pounds
• Certifications: UL Listed, RoHS Compliant

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: 52151-SWB-UPC