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Not every campground pedestal is wired correctly, and reverse polarity can damage your RV's electrical system before you even notice a problem. This Southwire Surge Guard transfer switch is a 50A, door-mounted unit that watches for reverse polarity and helps keep your RV's electronics protected without the cost of a full surge-protector setup.
This is an entry-level model focused on reverse polarity protection specifically, not a full surge-suppression unit, so factor that into your RV's electrical protection plan.
