Marinco Pigtail Shore Power Adapter 50A Boat to 30A Dock The Marinco Pigtail Shore Power Adapter 30A Boat to 50A Dock allows you to connect from one dockside receptacle to one boat side inlet or equipment of a different power configuration. Fully molded and equipped with Marincos sealing collar and covers for use in wet marine environments. Pigtail adapters are equipped with covers and sealing collars where indicated, and are for use in wet locations. Marincos unique sealing collar system with c