Marinco 14/3 Locking Extension Cord - 15A - 25'

The Marinco 14/3 Locking Extension Cord – 15A – 25' is purpose-built for reliable shore power connections on boats, RVs, and marine docks where safety and durability are non-negotiable. After years on the water, any serious boater knows that a failed power connection can compromise everything from galley appliances to battery chargers and bilge pumps at the worst possible moment.

This 25-foot extension cord bridges the gap between your vessel's onboard receptacle and the pedestal or shore power outlet, delivering consistent 15-amp service without voltage drop or connection failures. Built with 14-gauge, 3-conductor copper wiring, the Marinco extension cord handles the full 15-amp load safely and efficiently across its 25-foot length. The locking connector design is the critical differentiator here—it prevents accidental disconnection from vibration, deck movement, or crew handling, a feature that keeps power flowing even when swells rock the dock or fellow boaters brush past.

Cruisers, liveaboards, and marina-based boaters benefit most from this cord's reliability and reach—particularly those docking at older facilities where pedestal outlets may be outdated. The heavy-duty jacket resists UV degradation, saltwater corrosion, and fuel spills, extending service life far beyond standard extension cords. The three-prong configuration provides both hot and neutral conductors plus a dedicated ground, essential for protecting sensitive marine electronics and eliminating shock hazards in wet environments.