Lets take it a little easy. Sdetweil was willing to tell us what happens if you connect to a 220 service with no neutral. Something that can happen to all of us that have 50 amp RV's and happen to connect to a source with an open neutral. Open neutrals are common in the power distribution system.
The RV if wired correctly will not have a connection between the neutral and ground. This will result in high voltages on the 110 gear depending on the impedance seen on each side of the 220. If one side is low impedance and the other is high the high side impedance can see as much as 200 plus volts. Then when that device fails it will become a low impedance and the other side will see high voltage. This will go on until most of the devices that are connected and turned on fail.
It is important to check out the park connection before connecting the RV. More so with the 50 amp connections due to the possible open neutral.
