Connect your boat's 30A dockside power to standard 20A shore power outlets. Sierra's AC12560 compact adapter features a twist-lock male connector that safely steps down to a female inlet, rated for 125VAC at 20A maximum. Nickel-plated brass contacts ensure reliable connections in marine environments, while the nylon-molded plug provides durability. ETL listed and meets UL and CSA safety standards for worry-free docking.