Originally Posted by cdrdevine
Do I really need to buy a 30 amp and 50 amp
What are you talking about?
A surge protector is designed for lightning strikes and high voltages.
You may be tallking about a plug in that will drop out when voltage i the parj gets too high or too low then yes. Oh most of these devices also have surge protection for lightning strikes.
You can get away with not buying one but if you plug into a pedestal that has loose or worn plug it can cause problems. Also if you go to parks in mid summer when everyone has their AC on the voltage may be low which can cause problems.
The biggest and most expensive device that can be damaged is the refrigerator control board and that is a few hundred bucks.
Most people spend a few hundred on something like this.
If you have a 30 amp plug on your RV the get a 30 amp.
Portable Surge Guards With LCD Display - Product - Camping World
This is what I use in my motorhome