The Southwire PRB-57550-UPC is a high-performance, non-metallic weatherproof junction box designed for safe and reliable electrical installations in outdoor and wet environments. With its round form factor, five threaded hub openings, and durable PVC construction, this box is ideal for residential, commercial, and marine applications where corrosion resistance and flexibility are essential.

Key Features:

• Durable PVC Construction:

  • Made from corrosion-resistant polyvinyl chloride (PVC), engineered to withstand moisture, chemicals, and harsh weather conditions
  • Maintains structural integrity longer than metal alternatives, especially in marine or acidic environments

• Flexible Hub Configuration:

  • Equipped with five threaded outlets compatible with 1/2" or 3/4" NPT conduit
  • Includes (4) 3/4" closure plugs and (3) reducer bushings for customized conduit sizing

• Compact Round Design:

  • Diameter: 4.25"
  • Depth: 1.125" to 1.65" depending on model variant
  • Cubic Capacity: 13.5 cu. in.
  • Weight: Approx. 0.438 lbs

• Installation & Accessories:

  • Integrated mounting feet for secure wall or surface installation
  • Includes mounting hardware and multi-lingual instructions for easy setup
  • Compatible with standard weatherproof covers and electrical accessories.

• Certifications & Compliance:

  • UL Listed for wet locations and marine use
  • Complies with NEC and NEMA 3R standards for outdoor electrical enclosures
  • Prop 65 Warning: Contains Bisphenol, a chemical known to cause reproductive harm

Applications:

• Ideal for mounting outdoor outlets, switches, lighting fixtures, and other electrical devices.
• Suitable for use in residential, commercial, industrial, and marine environments exposed to moisture or corrosive elements.

Benefits:

• Weatherproof Protection: Designed to resist water ingress and environmental wear.
• Flexible Installation: Multiple hub sizes and included accessories simplify setup.
• Long-Term Reliability: PVC body ensures durability and low maintenance.
• Code Compliance: UL and NEMA ratings guarantee safe use in wet and outdoor locations.