We just came home from Texas. We stayed at Stone Creek RV park just a few mile from Ceblo Texas. We had three transformers go out within a two week period. I have a on-board surge protector so the motorhome was protected. We had our shore power cable welded to the inlet plug. I didn't know this until it was time to head north. Lucky I used a 90 deg adapter plug into the inlet then plugin the cord. This way I was able to remove the power cable. I had it repaired when I got home and was told this was caused by the transformer surge. I don't know if one of those surge protectors that you plug into the power box would have protected the inlet plug.
Happy Camping, bye Dennis