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Marinco P503-30 EEL Pigtail Adapter 50A to 30A 125V 18 Inch

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

P503-30
06/01/2036 12:55 AM
Sale Price

$149.22

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Product Details

The Marinco P503-30 EEL Pigtail Adapter allows you to connect your 30A shore power cord to a 50A 125V shore power service. This adapter features Marinco's patented EEL (Easily Engaged Lock) jaw-clamp technology that provides a secure, watertight connection with single-handed operation and a secondary locking feature.

Key Features:

  • Patented EEL jaw-clamp design provides watertight seal without separate sealing rings
  • Built-in LED cord light in female connector illuminates for easy nighttime connections
  • Dual power indicator lights at both ends confirm power flow and alert when connected
  • Single-handed operation with secondary lock for added security
  • Flexible 10AWG marine-grade cable with 18-inch length for strain relief
  • Included sealing collar creates weatherproof seal when joining multiple cables
  • Rated for wet environment use
  • UL listed and exceeds rigorous marine safety standards
  • Five-year manufacturer warranty

Technical Specifications:

  • Female Connection: NEMA L5-30R twist-lock with EEL technology (boat side)
  • Male Connection: SS1-50P twist-lock (shore side)
  • Amperage Rating: 30A
  • Voltage: 125V
  • Cable: 10AWG, 3-conductor
  • Construction: PVC jacket, nylon plug bodies, nickel-plated brass contacts
  • Overall Length: 18 inches

This pigtail adapter is ideal for boaters who need to adapt higher amperage shore power pedestals to their vessel's 30A power system. The EEL design ensures reliable, waterproof connections in marine environments.

Products specifications

Amperage

30 Amps50 Amps

Type

Pigtail Adapters

Voltage

125 Volts

Warranty Details

Five Years

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This part has been discontinued years ago, nice to find one.

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