Review on Technology Research Corp 34931 Portable by James Broome

this is just a small part of what is required to ensure my electrical system is not damaged by faulty wiring at the RV site. Very easy to use. Connect to the pole, wait 10 seconds and when the indicator turns green you know it's safe to connect your RV. It's quite expensive, but compared to the damage that surges or faulty wiring can cause to your entire electrical system and anything plugged into your RV's outlets, it's a drop in the bucket. I recommend you browse the available YouTube videos if you are looking for such a device.