Hubbell HBL503NM 50A 125V Shore Power Inlet

The Hubbell HBL503NM 50A 125V Shore Power Inlet is the marine-grade electrical connector every serious boat owner needs for safe, reliable dock-side power delivery. Whether you're running a sportfisher, cabin cruiser, or live-aboard vessel, this inlet serves as the critical interface between shore power and your boat's electrical system. After years on the water, any skipper knows that a quality shore power connection isn't optional—it's foundational to safe cruising and extended time away from the marina.

Built with a UV-resistant white Centrex cover, the HBL503NM delivers weatherproof protection in the harsh marine environment where sun, salt spray, and constant moisture take their toll on exposed hardware. The non-metallic housing resists corrosion far better than traditional brass or aluminum alternatives—a critical advantage when your boat sits at the dock month after month. Interior terminals are engineered for straightforward wiring, eliminating guesswork during installation or service. Standard mounting holes spaced 2⅜ inches on center align with existing patterns on most modern vessels, and the included gasket and mounting screws ensure a watertight seal that keeps saltwater intrusion at bay.

This inlet is ideal for anyone upgrading aging shore power equipment or installing new electrical systems on restoration projects and new builds alike. The 50-amp, 125-volt rating handles substantial onboard loads—refrigeration, air conditioning, heating, and battery charging—without voltage drop or thermal stress. IP56 protection rating confirms compliance with marine electrical standards, giving you confidence that your connection will remain safe and functional whether you're tied up in a downpour or facing spray from a passing freighter. Installation takes just minutes once you've confirmed the existing mounting pattern, and the result is a clean, professional connection that serves your vessel reliably for years.