Engineered for the Demands of Marine Environments

Powering large vessels like superyachts or commercial boats requires equipment that stands up to salt spray, constant moisture, and heavy electrical loads. The Hubbell M5200BS1R shore power inlet delivers exactly that— a robust 200A, 600V, 4-pole, 5-wire solution designed specifically for marine applications. Its watertight construction ensures reliable connections even in harsh coastal conditions, preventing downtime that could derail your voyage.

What sets this inlet apart is its pioneering status: Hubbell led the way with the first UL-listed 200A marine ship-to-shore system, building on decades of innovation in electrical safety. Crafted from copper-free aluminum with a durable electrostatically applied epoxy/polyester finish, it resists corrosion while maintaining a sleek gray metallic look that blends into any dockside setup.

Key Features That Deliver Unmatched Performance

• NEMA 4X Rating: Superior protection against water ingress, dust, and corrosion—ideal for dockside exposure.
• Pin and Sleeve Design: Nickel-plated Tellurium copper contacts offer exceptional heat dissipation and resistance to pitting from saltwater.
• Cord Compatibility: Handles #1 AWG up to 250 MCM cables, accommodating thick conductors up to 0.653 inches in diameter for high-amperage feeds.
• Wingnut-Secured Lid: Ensures a tight seal when not in use, maintaining watertightness without fumbling for tools.
• UL Listed and Marine-Ized: Meets stringent safety standards for ship-to-shore power, with full interchangeability to compatible industrial devices like those from Crouse-Hinds or Appleton when properly installed.

These elements combine to create a system that's not just functional but future-proof, handling the power needs of modern vessels with three-phase capabilities.

Why Boaters and Marina Operators Trust This Inlet

Imagine docking after a long passage, knowing your power connection won't fail due to a flimsy seal or corroded contacts. The M5200BS1R minimizes arc flash risks with its precision-engineered interfaces and supports seamless integration into existing marine electrical setups. Marina pros appreciate its versatility—pair it with matching Hubbell connectors, plugs, or back boxes for a complete, color-coded system (gray for inlets, gray/yellow accents for cord ends).

From luxury yachts drawing heavy AC loads for air conditioning and stabilizers to workboats running pumps and winches, this inlet scales to demanding scenarios. Its 15-degree angled back box options (sold separately) allow flexible mounting orientations, simplifying retrofits on uneven bulkheads or decks.

Practical Installation Insights for Marine Pros

Selecting the right back box—such as those with 2-inch or 2.5-inch NPT hubs—ensures a secure fit for your conduit runs. Always verify cord grip ranges match your cabling to avoid strain on terminations. The locking mechanisms on paired components create drip-proof joints, extending service life in rainy or splash-heavy marinas.

Pro tip: Regular inspections of the wingnut lid and contacts keep performance optimal, especially in high-traffic slips where debris buildup is common.

Building a Reliable Ship-to-Shore Ecosystem

This inlet shines brightest as part of a full Hubbell marine lineup, where components like watertight connectors and dockside receptacles share the same rugged specs. The result? A plug-and-play system that reduces connection errors and boosts safety during high-power transfers.