Southwire 52171-S-UPC 4x4 Welded Steel Square Electrical Box

Product Description

The SOUTHWIRE 52171-S-UPC is a welded steel square electrical box designed to distribute power across multiple electrical devices at junction and distribution points. Measuring 4 inches x 4 inches, this screw-on box supports runs where conductors split into two or more directions. Combination knockouts are built in to provide wiring flexibility across a range of installation layouts. The box weighs 0.898 pounds and is listed to UL standards and RoHS compliance, making it suitable for commercial and residential electrical work.

This square box is used in residential and light commercial wiring applications where a central distribution point is needed. It is well suited for ceiling, wall, and junction installations where multiple circuit runs converge. Licensed electricians install this box as part of rough-in wiring on new construction and renovation projects. Combination knockouts accommodate various conduit and cable entry configurations without requiring additional fittings in many setups.

Key Features

• 4 inches x 4 inches welded steel construction for durability in standard electrical installations
• Combination knockouts allow flexible conduit and cable entry from multiple directions
• Compatible with combination Phillips/Slotted screw heads for faster installation
• UL listed and RoHS compliant for use in code-required applications
• Screw-on design for secure mounting during rough-in work

Compatibility

Designed as an OEM-style replacement and standard-fit option for 4-inch square electrical box applications in residential and light commercial wiring 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 power is off with a non-contact voltage tester before beginning work. Secure all conductors and ensure the box is properly anchored to framing or structural backing before closing the installation. Do not exceed the box fill capacity as calculated per NEC Article 314.

Technical Specifications

• Dimensions: 4 inches x 4 inches
• Weight: 0.898 pounds
• Material: Welded Steel
• Certifications: UL Listed, RoHS Compliant

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: 52171-S-UPC