Review on Southwire 34930 Surge Guard 30A: Full Protection Portable with LCD Display - Superior Safety in Sleek Black Design by Jerome Pritchard

I purchased this unit on the recommendation of an electrical engineer. Many campgrounds, especially older and/or government operated campgrounds, have installed power poles incorrectly - reversed hot/neutral, broken ground, etc. To be sure you need a device that will check for correct polarity, ground and voltage. This device checks for incorrect or improperly installed power poles, saving electricity for our trailer. system from damage as well as power surges or over-voltage conditions,