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Hubbell HBL303SS 30A Inlet Round Stainless SteelEngineered for Marine Durability and Ease Crafted from premium stainless steel, this 30A round inlet stands up to the harshest saltwater environments, preventing corrosion that plagues lesser materials. Its redesigned terminations simplify wiring, cutting installation time while ensuring rock solid connections that handle the power demands of modern boats. The transparent interior lets you spot issues at a glanceno disassembly required. Pair that with
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Engineered for Marine Durability and Ease

Crafted from premium stainless steel, this 30A round inlet stands up to the harshest saltwater environments, preventing corrosion that plagues lesser materials. Its redesigned terminations simplify wiring, cutting installation time while ensuring rock-solid connections that handle the power demands of modern boats.

The transparent interior lets you spot issues at a glance—no disassembly required. Pair that with a self-closing, gasketed cover that seals out moisture completely when secured, and you've got reliable performance season after season.

Why Boaters Trust This Inlet for Reliable Power

  • Superior Weatherproofing: The gasketed cover and protective rear enclosure keep water, salt spray, and debris at bay, reducing downtime from failed connections.
  • Quick Visual Checks: Clear interior components mean you can verify wiring integrity without tools, ideal for pre-launch inspections.
  • Strain Relief Built-In: The included rear enclosure grips cables firmly, preventing pulls that could loosen terminals over time.
  • Precise Fit: Standard 2-3/8-inch mounting centers align perfectly with most hull designs, making retrofits straightforward.
  • Long-Term Value: Stainless construction resists pitting and rust, extending service life in brackish or ocean conditions where painted or plated inlets fail fast.

Boat owners rave about how this inlet eliminates flickering lights and power drops during stormy dockings, delivering steady 30A service for chargers, AC units, and appliances.

Effortless Installation Tips for Peak Performance

Start by selecting a flat mounting spot on your transom or hull side, ensuring at least 12 inches of clearance for cable routing. Use the included gasket and screws for a flush, leak-free seal—torque to spec to avoid over-compression.

Wire with 10-gauge marine-grade cable, stripping just enough for the easy-entry terminals. The strain relief clamps down on the cord to absorb vibrations from waves or engines. Test under load before hitting the water: plug in, run your systems, and watch for heat buildup.

Pro tip: In high-UV areas, the stainless finish holds its luster without fading, but a quick freshwater rinse after every trip keeps salt crystals from etching the surface.

Perfect for Trailers, Sailboats, and Center Consoles

Whether you're outfitting a weekend fishing rig or a liveaboard cruiser, this inlet powers essentials like refrigerators, microwaves, and battery banks without compromise. Its compact round profile minimizes drag in the water and blends seamlessly with sleek boat aesthetics.

Upgrade from plastic housings that crack under UV exposure or zinc dies that corrode in weeks—this stainless powerhouse is the go-to for serious mariners chasing uninterrupted shore power.

Keep It Running Like New: Simple Upkeep

Regular care is minimal: Unscrew the cover monthly, inspect the transparent housing for moisture or arcing signs, and wipe contacts with electrical cleaner. Avoid silicone sprays that attract dirt—instead, rely on the factory gasket for sealing.

Common pitfalls? Over-tightening screws strips threads; loose wiring causes voltage drops. Address these early, and it'll outlast your hull.

Frequently Asked Questions

What makes stainless steel ideal for marine shore power inlets?

Stainless steel offers exceptional resistance to saltwater corrosion, UV degradation, and mechanical wear, ensuring years of reliable performance in harsh marine conditions compared to aluminum or plastic alternatives.

Is the interior really transparent, and why does it matter?

Yes, the clear interior allows instant visual inspection of wiring and connections without opening the unit, helping spot loose terminals or debris quickly to prevent power failures.

How do I ensure a watertight seal on this inlet?

Secure the self-closing cover with the provided screws after installing the gasket. This creates a complete environmental barrier, rated for wet locations when properly mounted.

What size cables should I use with a 30A inlet?

Use 10 AWG marine tinned copper wire for runs up to 50 feet to minimize voltage drop. The easy-wire terminations accommodate standard stranded conductors.

Does it include mounting hardware?

Yes, mounting screws, gasket, and a protective rear strain relief enclosure are all included for a complete out-of-box installation.

Can this handle continuous 30A loads like air conditioners?

Absolutely—it's built for 30A straight blade shore power, supporting continuous loads when paired with proper breakers and adequately sized shore cords.

What's the mounting hole spacing?

Holes are spaced 2-3/8 inches (60.3 mm) on centers, matching most standard boat hull cutouts for easy replacement or new installs.

Traditional, stainless steel shore power inlet has new easy-to-wire terminations. Interior is transparent for quick and easy visual inspection. Interior is shielded from the elements by a gasketed, self-closing cover, watertight when cover is screwed in place. Mounting holes are 23/8" (60.3) on centers. Mounting screws and gasket included. Protective rear enclosure/strain relief also included.



"Traditional, stainless steel shore power inlet has new easy-to-wire terminations. Interior is transparent for quick and easy visual inspection. Interior is shielded from the elements by a gasketed, self-closing cover, watertight when cover is screwed in place. Mounting holes are 23\/8in 60.3 On centers. Mounting screws and gasket included. Protective rear enclosure\/strain relief also included."
SKU: NVN-1002119
MPN: HBL303SS
UPC: 783585040523

Hubbell HBL303SS 30A Inlet Round Stainless Steel

Item no : 99559850989
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