Reliance Controls PBN50 50-Amp NEMA 3R Outdoor Power Inlet Box

Overview

The Reliance Controls PBN50 50-Amp NEMA 3R power inlet box is built for outdoor use near an in use generator. Its purpose driven design helps keep the generator outside the living area, which can reduce the likelihood of fumes entering the home while you stay comfortable inside. The enclosure combines rugged steel construction with a durable powder coat, delivering weather resistance while maintaining a clean appearance in a yard or garage exterior. Thoughtful engineering puts accessibility first, so technicians can reach wiring through a removable front face and work within generous interior space. With a history of practical reliability, Reliance Controls offers long standing experience in power transfer gear that you can count on in everyday use.

What it does

This non metallic enclosure offers a watertight connection to your transfer switch or panel, while a powder coated steel body stands up to weather and wear. A spring loaded inlet cap seals the front connector when not in use to help keep moisture out. The design supports direct wiring from the exterior wall to your transfer setup, reducing the need for cords crossing thresholds. It is sized for generators up to 12 500 running watts and is built to tolerate outdoor conditions whether in rain, sun, or humidity. The four knockouts offer flexible routing options on sides, bottom and back to accommodate different wall layouts and conceal wiring neatly.

Key features

• Cabinet type is NEMA 3R for raintight outdoor operation
• Designed to connect directly to generators up to 12 500 running watts
• Durable, corrosion resistant non metallic inlet box with steel construction
• Four knockouts 1/2 and 3/4 inch on sides, bottom and back for easy rough-in

Wiring & installation

The face is removable to simplify placement and wiring, and the unit is intended to be hardwired through an exterior wall directly to the transfer switch or panel, eliminating cords passing through doors or windows. A typical rough-in benefits from the generous interior clearance, while weatherproof sealing helps protect connections. For service, the enclosure is designed so electricians can access conductors without disturbing the entire installation. The result is a tidy, professional looking outdoor power interface.

• Direct wiring improves safety and neatness by avoiding loose cords
• Generous wiring space supports straightforward rough-in and future upgrades

Brand heritage

Reliance Controls has a long history of electrical innovations and robust transfer solutions. Since 1909 the brand has pursued practical engineering with a focus on reliability, earning recognition for manual transfer switches and related accessories. The PBN50 reflects a pragmatic approach grounded in this legacy.

What you gain

Expect a sturdy, weather ready inlet box that tolerates outdoor conditions while providing a reliable path to your transfer system. It combines a rugged enclosure, accessible wiring, and a moisture blocking cap when not in use. The kit is designed to simplify outdoor generator integration and helps you maintain a tidy, secure entry point for your power transfer setup.