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

Product Description

The SOUTHWIRE 52151-S-UPC is a 4 inch x 4 inch welded steel square electrical box designed for distributing power across multiple circuits where conductor runs split into two or more directions. Built for residential and light commercial wiring applications, it features combination knockouts that allow wiring to enter or exit from multiple points without requiring a separate knockout punch. The box is designed for use with combination Phillips/Slotted screw heads, simplifying installation in the field. It carries UL listing and RoHS compliance, meeting standard electrical code requirements. Electricians rely on this type of box as a central distribution point in branch circuit wiring.

This square box is suited for residential and commercial electrical installations where a single junction or distribution point must accommodate several conductor runs. It is commonly installed in walls, ceilings, and utility spaces as a branch circuit junction box or device mounting box. The 4 inch x 4 inch footprint is a widely used standard size in commercial rough-in work and multi-device installations. The welded steel construction holds up to the demands of commercial job sites and meets typical code requirements for metal box installations.

Key Features

• Welded steel construction provides durability for residential and commercial electrical installations
• Combination knockouts offer flexible entry and exit points for multiple conductor runs
• Compatible with combination Phillips/Slotted screw heads for faster installation
• UL listed and RoHS compliant for use in code-governed electrical work
• Standard 4 inch x 4 inch square footprint for broad fitment with covers and extension rings

Compatibility

Designed as an OEM-style replacement and standard-fit square electrical box for 4 inch x 4 inch square box covers, mud rings, and extension rings in residential and commercial electrical systems.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize the circuit at the breaker panel and verify the absence of voltage before beginning work. Secure the box to structural framing members or approved bracket systems before pulling conductors. Do not exceed the box fill capacity as calculated per NEC Article 314.

Technical Specifications

• Dimensions: 4 inches x 4 inches
• Material: Welded Steel
• Weight: 0.719 pounds
• Certifications: UL Listed, RoHS Compliant
• Unit of Measure: Each

Standard Information

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