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Marinco P504-30 EEL Pigtail Adapter 50A to 30A Marine Shore Power

Manufacturer

Marinco

<h3>About Marinco: Trusted Marine Electrical Innovation Since 1972</h3><p><strong>Marinco</strong> has been a cornerstone of the marine electrical industry for more than five decades. The brand traces its roots to 1972, when founder Bud Toly, frustrated by the poor quality of available marine electrical gear, set out to engineer something better from the ground up. That spirit of problem-solving and uncompromising quality has defined Marinco ever since. Today, the brand is part of the Navico Group — a global leader in marine technology — and continues to serve everyone from weekend bass anglers to commercial vessel operators and major OEM boatbuilders.</p><p><a href="/11273-marinco">Marinco</a> is best known as a world-class manufacturer of shore power systems, but its catalog spans far beyond that single category. The brand's engineers design products for the real-world punishment of salt, spray, and constant moisture — environments where inferior components fail quickly and safe, reliable electrical connections are non-negotiable. Industry involvement is baked into the brand's DNA: <a href="/11273-marinco">Marinco</a> actively participates on ABYC standards committees, helping shape the very regulations its products are built to exceed.</p><h3>Shore Power, Signaling, and Ventilation — Built for the Water</h3><p>At the core of Marinco's reputation is its shore power lineup: heavy-duty cordsets, inlets, outlets, and adapters engineered for both 30-amp and 50-amp applications. The patented EEL (Easily Engaged Lock) jaw-clamp system allows one-handed connection without the frustration of threaded locking rings, and many premium connectors feature built-in LED power indicators so boaters can confirm live power at a glance. Products are engineered to CSA and UL standards, and nickel-plated brass contacts are used throughout to resist the corrosion that plagues lesser marine connectors.</p><p>Beyond shore power, Marinco offers an impressive range of marine accessories that keep vessels safe and comfortable. The brand's <a href="/11273-marinco-air-horns-201608">air horns</a> are a staple on boats of all sizes, delivering the kind of authoritative, regulation-compliant signals that can genuinely protect lives on the water. And for boaters who want to keep cabin air fresh without running down their battery bank, Marinco's <a href="/11273-marinco-solar-cabin-vents-202545">solar cabin vents</a> from its trusted Nicro line provide around-the-clock ventilation powered entirely by the sun — and a built-in rechargeable battery when the sun goes down.</p><h3>Why Boaters Choose Marinco</h3><ul><li><strong>OEM Trust:</strong> Major boatbuilders specify Marinco electrical components from the factory, a testament to the brand's reliability standards.</li><li><strong>Standards Leadership:</strong> Active participation on ABYC committees means Marinco products don't just meet standards — they help write them.</li><li><strong>Marine-Grade Engineering:</strong> Every product is designed for salt air, vibration, and moisture, not just adapted from a land-based design.</li><li><strong>Complete System Thinking:</strong> With over 800 electrical products engineered to work together, Marinco makes it easy to build a cohesive, safe onboard electrical system.</li><li><strong>Decades of Refinement:</strong> Over 50 years of feedback from real boaters has shaped every product iteration, from connector geometry to diaphragm materials.</li></ul><p>Whether you're outfitting a new build, upgrading aging shore power hardware, adding a safety horn, or solving a below-decks ventilation problem, Marinco brings proven engineering and category-defining products to every corner of the job.</p>

Part Number

P504-30
06/01/2036 12:55 AM
Sale Price

$172.93

In Stock (9)

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Usually delivered within 2 days

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Product Details

The Marinco P504-30 EEL (Easily Engaged Lock) ShorePower Pigtail Adapter allows you to adapt 50 amp dockside service to your boat's 30 amp shore power inlet. This 20-inch adapter features Marinco's patented jaw-clamp design that provides secure, one-handed operation with a watertight seal—no sealing ring required.

Smart Power Monitoring:

  • Built-in LED cord light in the female (boat side) connector for easy hookup in low-light conditions
  • Power indicator lights at both ends confirm power is flowing through the adapter
  • Alert light warns when adapter is plugged into shore power

Key Features:

  • Single-handed operation with secondary locking feature for added security
  • Patented jaw-clamp technology creates a watertight seal every time
  • Included sealing collar provides weatherproof protection when joining cables
  • Safe for use in wet marine environments
  • Meets and exceeds rigorous UL testing standards
  • Five-year manufacturer warranty

Technical Specifications:

  • Connections: SS1-50P 50A 125/250V male twist-lock to NEMA L5-30R 30A 125V female twist-lock with EEL
  • Amperage Rating: 30A
  • Voltage: 125V
  • Cable: 10 AWG, 3-conductor
  • Construction: PVC jacket, nylon plug bodies, nickel-plated brass contacts
  • Overall Length: 20 inches

This adapter is ideal for boaters who need to connect to higher-amperage shore power while maintaining compatibility with their 30-amp onboard systems. The EEL design ensures reliable performance in harsh marine conditions.

Products specifications

Amperage

30 Amps50 Amps

Type

Pigtail Adapters

Voltage

250 Volts

Warranty Details

Five Years

Easy and Quick

All went well!

Great deal on my purchase. Tracking # given once order shipped 2 businesss days later. Good merchant.

So far experience is good, will see if parts show up as they say.

Quick and easy

The prices were so much better with Autoplicity I couldn't believe it was the same item. E-mail response came within an hours. Will buy from again.<br><br>Ok, the verdict's still out on this one. Autoplicity said my item was shipped two days ago (two days after ordered), but FEDEX indicates they've only received "shipment information", after four days. I'll follow up when I actually see the order.

Quick and easy

Impressed with selection and price. Saved over traditional e-tailers and they shipped within 24 hours. Excited to recommend AUTOPLICITY.

The buying experience was great You will get 5 stars if the rack fits my 2008 GMC

I'll start off saying that Autoplicity's prices are unbeatable...but, I placed my order on a Saturday night (which I know is the weekend)on a in stock part and it took them till the following Thursday to ship it out. I use my truck to make a living and was hoping to get it a little quicker, but now I'm down another 3-4 days till the part gets here. Also, I sent a e-mail on Tuesday evening regaurding my order and never got a response.

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