Blue Sea 8478 AC 10 Position

The Blue Sea 8478 AC 10 Position marine-grade AC electrical panel is designed for serious 12V system builders and mobile enthusiasts who require reliable power distribution in high-vibration environments. Ideal for outfitting RVs, boats, truck campers, or expedition vehicles, this heavy-duty selector switch is built to handle voltage fluctuations and current demands that standard automotive panels cannot tolerate.

At its core, the 8478 is a 10-position rotary selector specifically for AC circuits, constructed with marine-grade materials and precision engineering. It isolates and routes AC power with minimal parasitic draw when the selector is in the off position. The panel is made from corrosion-resistant materials rated for salt-air environments, and its robust switching mechanism manages inrush current spikes during generator startup or load transitions.

Each position is clearly marked and mechanically positive, preventing accidental circuit selection—critical in mobile or marine applications where vibration could lead to dangerous switching errors. The compact 9 x 5 x 12 inch footprint makes it suitable for tight engine bays or galley installations without sacrificing the electrical capacity that expedition-grade systems demand.