Marinco 15A 12/3 Heavy-Duty Extension Cord - 50'

The Marinco 15A 12/3 Heavy-Duty Extension Cord – 50' is purpose-built for serious boaters and anglers who demand reliable shore power connections on the water. Whether you're docked at a marina, anchored at a remote coastal location, or powering equipment during extended fishing trips, this extension cord bridges the gap between fixed electrical pedestals and your vessel's onboard systems. At 50 feet, it reaches beyond typical dock infrastructure while maintaining the amperage capacity needed for marine refrigeration, battery chargers, heating, and pump systems.

Built to Marinco's marine-grade standards, the 12/3 gauge construction delivers a full 15-amp circuit with minimal voltage drop across the 50-foot run—critical when powering sensitive electronics or high-draw appliances. The heavy-duty jacket resists UV degradation, moisture infiltration, and abrasion from dock cleats, railings, and repeated coiling cycles that claim ordinary cords within a season. The connectors are designed to maintain watertight integrity in salt-spray and humid environments, and the cable's flexibility at temperature extremes means it won't kink or crack during winter storage or summer sun exposure.

This cord is ideal for cruising powerboats, fishing vessels, and live-aboard sailboats that rely on consistent shore power management. Its 50-foot length accommodates deep-water berths and marina layouts where standard 25-foot cords fall short, while the 15-amp rating is sufficient for single-circuit loads without tripping breakers. Boaters upgrading from contractor-grade cords will immediately notice the marine-specific construction and connectors—this extension cord is engineered for salt water, not construction sites. Pair it with a quality surge protector for complete system protection against shore power fluctuations.