This built-in AC circuit analyzer provides proper wiring confirmation and presence of power. The analyzer checks for open ground, open neutral and correct polarity. To use, simply plug this unit into the campground power box and then plug your RV power cord into the Circuit Analyzer/Surge Protector.
This unit is also a fully automatic surge protector which helps protect your RV against damage from power surges. The analyzer checks for open ground, open neutral and correct polarity. Weather resistant case. 30A model (55-2764) offers 1020 joules surge protection. 1 year warranty.