Personally, I do not have any answers other than those posted previously in this thread and the other thread on this topic. Almost all I post is Copy & Paste from others. The links I posted have the info needed. The only thing I can say is to go to the websites to see what the experts say. I do think it is a combination of things. The NoShockZone site seems to be the authority. He seems to like the combination of the three light tester and the no-contact tester. I like to see voltage too. Then we have the ISB voltage regulator. We also have a Progressive if the voltage seems stable. Maybe some of this is overkill. But I prefer not to take chances with electricity. None of the testing devices cost a whole lot and take almost no time out of normal hookup time. Based on articles above it appears to me that any outlet can be suspect. Even if they were installed properly by competent licensed electricians they can develop internal problems over time - water gets in and maybe even bugs get in - we have found rodents and lizards in outlets who have chewed insulation. How much safety is worth to you should determine what you choose to do. With the exception of the Prime Products tester I linked in the first thread I think all of the basic testing devices can be easily found at places like Home Depot. An electrician friend of mine told me he much prefers the Klein Tools products so that is what I have - along with the Prime Products combination polarity and voltage tester. As I said before - I am not an authority and do not claim to be - just passing on information from others who do claim to be authorities.
Trying to answer specific questions......
Now if the OP had used the Progressive Protection Device, would he still had his burn up?
A previous post that was linked stated.....
The Progressive surge protector is a very good device and is certainly recommended for serious RVers. What we have found, however, is that neither the Progressive nor the Surge Guard models can protect against the dual fault situation called Reverse Polarity/Bootleg Ground (RPBG). It has been well documented by my buddy, Mike Sokol. Check out how and why the RPBG situation can even fool expensive ground loop impedance devices and those inexpensive three-light testers that everyone relies on; read this article carefully and be sure to click on the internal links!
