The information provided is for a 2002 Duffy 18' Classic. Many systems and components are common across models and years.
It is up to you to determine if this information applies to your boat or not.
Shore power cords are generally designed for more demanding applications than needed for a Duffy. An alternative is to make your own, which has the advantage of allowing you to adjust the length and wire gauge to your needs. Because the connectors will not be water-proof, it is important that each end be sheltered at all times.
We have NEMA L5 connectors for both the shore connection and the boat connection, which is common. These are two-pole ground locking connectors rated for 125V.
The shore connection uses a male NEMA L5-30P (for 30 Amp Plug) connector, such as the Leviton 2611.
Our boat connection uses a female NEMA L5-30R (for 30 Amp Receptical) connector, such as the Leviton 2613. This connects to our 30A power inlet box inside of the boat.
For the cord, we used a heavy-duty outdoor 125V 15A 12/3 extension cord, cut off the ends, and cut to length. Check the power requirements of your battery charger and any other devices using shore power to determine the proper cable size, including accounting for voltage drop.
We used Lokman LK-88 1/2" stainless steel cable clamps with stainless steel screws to secure the cable to the dock.
