Marine Shore Power Cords - Your Dock-side Power Link
When your boat is plugged into the dock, the shore power cord is literally the lifeline connecting you to electricity. A properly rated, marine-grade cordset helps ensure that your appliances, chargers, air conditioning, and electronics receive stale power, while keeping you protected from the hazards of poor connections, corrosion, and overload.
Types of Marine Shore Power Cords
30 Amp Cordsets (NEMA L5-30 / Similar)
Ideal for smaller to mid-sized boats. These typically supply 120V and handle enough load for basic systems. Choosing the correct plug and ensuring compatibility is crucial.
50 Amp Cordsets (NEMA SS-2 / Similar)
Used for larger vessels requiring higher capacity, often dual-leg 120V/240V service. These allow more circuits and heavier loads like air conditioning and large battery chargers.
Heavy-Duty & Long-Length Cordsets
For boats docked far from pedestals, or that need to upgrade wiring for larger loads. These use thicker gauge cable, marine-molded plugs, lock rings, and waterproof connectors. For example the Marinco PowerCord Plus 30 Amp cordset comes in lengths up to 50'.
Key Features to Consider
When selecting a marine shore power cord, evaluate these features:
- Amp & Voltage Rating: Ensure it matches your boat's inlet and pedestal
- Cable Gauge & Length: Longer cords may require thicker gauge to reduce voltage drop.
- Marine-Rated Construction: Molded plugs, threaded lock rings or locking jaws, corrosion-resistant contacts, UV/salt-resistant jacket.
- Connection Security: Locking rings or jaws to prevent loosening, which can lead to arcing faults.
- Inspection & Maintenance Design: Features like molded one-piece ends, indicator lights, protective boots help with safe long-term use. The Marinco EEL Shore Power Cordset is one of the best out there.
- Brand & Certifications: Look for marine certifications or listings to ensure suitability for wet, salt-air environments.
When to Replace Your Shore Power Cord
Replace a cordset when you notice any of the following:
- The plug or connector shows discoloration, melting, or corrosion.
- The cord jacket is cracked, soft, or damaged from UV, heat or abrasion.
- You've upgraded boat power needs (from 30 Amp -> 50 Amp) and your current cord is undersized.
- The connection feels loose, overheats, or shows signs of arcing.
Regular inspection and timely replacement can prevent serious issues like arcing faults or electrical fires.
Shop Marine Shore Power Cords
Browse our complete collection of marine shore power cords. Filter by amp rating (30 Amp vs 50 Amp), cord length, brand, cable gauge, and plug type. Need help selecting the right cord for your boat's pedestal and inlet? Our team is ready to assist.
Frequently Asked Questions About Marine Shore Power Cords
What size shore power cord does my boat need?
Match the amp rating of your boat's shore power inlet (commonly 30A or 50A) and ensure voltage and plug type alignment. If you plan to draw more power (e.g. air conditioning), consider upgrading to a higher capacity cordset.
How often should I inspect or replace my shore power cord?
Inspect every season for signs of wear, corrosion, or overheating. Replace immediately if you find discoloration, melting, loose plugs or compromised wiring. A safe rule: no visible damage = okay; any damage = replace.
Can I use an extension or generic power cord instead of a marine shore power cord?
No. Generic cords lack marine-rated plugs, sealing mechanisms and corrosion-resistant materials. Using one risks overheating, poor connection, damage or fire. Invest in a true marine shore power cordset built for the environment.
What are the risks of a bad shore power cord connection?
Loose or corroded connections can cause arcing faults, overheating, or even fires. Receptacles and cord ends should be clean, tight, and properly sealed.