50a to 30a question

Me Again wrote:
You still should install a 50 surge protector.

While on a 50 amp outlet, if you loose neutral you burn up all your AC items with 240V across them.

I agree strongly with using a surge protector (with combined auto transfer switch if you have a hardwired generator onboard)....
BUT.. as for burning up all the ac appliances if the neutral leg should be lost for some reason, I dont see how this is even possible unless its wired incorrectly INSIDE the RV...

the 50a shore power has the potential of supplying 240volt power to the unit, but the power panel INSIDE the rv is where the 120v would have to be combined to create the 240v power. this is not the case on most RV's... but the high end units with a washer/dryer option or household range will have the 220v option inside (or anyone who knows what to do could wire a circuit in)

bottom line is, on a 50a circuit, there are 2 separate legs of 120v power that are "out-of-phase" with one another coming in to the rv (if the 2 legs of 120v power were "in-phase" with one another, like on a generator, there would no option for 240v power), and these are NOT combined in any manner except at the 240v appliance itself... and in the USA the neutral is only acting like a ground in 240v circuit, and without it the appliance still works like normal. but ALL the 120v circuits will be lacking power (because half of its circuit has been lost).. but the appliances will be fine.

some countries of the world use only 2 wires to supply their 240v power, and not the three that we use here in the US..

but yes, one CAN absolutely fry all their 120 volt components if they dont know electricity, and yet try to do their own wiring inside the RV distribution panel or on the shore power side of it...