Generally Trailers do not
Some HIGH END motor homes MIGHT
But also be aware there are two types of devices called "Surge Protocters"
One is what I call a Spike supressor. I won't go into all of it but from time to time line surges can Spike the voltage eaily to a thousand or more. These "Clip" the spikes The spikes are very (like 1/60th or 1/120th of a second or less) long. But if you plug into say a 240 volt line with a 30 amp plug. No protection. or if the voltage drops to say 90 no protection
The Surge Guard I have .. well it will not pass power in either of those cases and some others as well.
