Originally Posted by Linda Bohr
Thanks for that warning. I would hate to really invest my time in the wrong information. Some of the people on this forum seem to have a lot of knowledge. I just wish they could come up with a definitive answer to help the OP.
There is one question that I have. Would a second surge protector hooked between the power pole and the power cord have protected the surge protector/transfer switch? Or is that just overkill? Does the transfer switch protect a motor coach from a malfunction in the generator?
Also, when the DW told the OP that the door to the box was uncomfortably hot to touch, would that ordinarily have sent up red flags that something was wrong with the electrical system?
Thanks to all for some very detailed possibilities for the failure. It just made me realize how much I need to learn by the time I actually get an RV and afterwards.
Yes, absolutely that is a red flag that something is definitely wrong! Abnormal heating in electrical circuits is generally indicative of high resistance flow — usual causes are loose or corroded connections. Things might get “warm to the touch” but they should never get hot and especially never uncomfortably hot....
Perhaps start by learning what a surge protector does and how it does it.
The thing overlooked by many folks is that, unless connected to a good earth ground, a surge protector really doesn’t have anywhere to shunt all of the “excess” energy to....
Sooo, running with shore power a SP has a path to ground to shunt the energy to but running in a floating ground type of situation there really is nowhere for that excess energy to go! It’s only recourse is to open up via fuse or breaker, both of these way too slow to operate to hamper the much faster transients of many (most?) surges.
Surge protectors are, by nature, sacrificial devices. Over time small surges, or a very big surge, will damage the device enough to leave it ineffective in doing its job. It is not uncommon in the sensitive electronics world to find expensive, high quality surge arresting devices protecting the electronics and cheaper devices protecting the high quality devices from the “day to day” trash from the power feeds.
As a side note, while they do occur, perhaps one of the least common causes of surges is lightning....