Originally Posted by CWEsquire
Hey Learjet, you nailed it! The plug in the garage had a bad ground! Thank you for the help!
However, there is more that you should do than just correct the bad ground.
In a normal and correctly wired RV, there should never be any hot skin even with a missing ground. The ground wire and its connection should be considered as simply a last chance safety "just in case" there is current flowing from the HOT wire coming into the RV and flowing to the chassis of the RV (which should not occur) and therefore the ground wire provides for another safe return path for the electricity instead of flowing through someone which with wet ground and depending on the person could be deadly.
What you should do is determine where the electricity (incoming hot wire) is leaking to the chassis ground. Common locations are with a broken or cracked water heater element, chafed wires, defective appliance.
It is not overly uncommon for a very little leakage to occur, perhaps 5 or less volts potential (from the hot chassis skin to the earth), however 5 volts is not normally enough for you to have felt when you first determined there was an issue.
I am not sure of your electrical skills, do you have a dvom (voltage meter) and know how to use it? Keep in mind that what you encountered is still a potentially dangerous condition. The ground connection again is simply a safe path for the electricity to flow if the chassis (skin) somehow gets energized which it should never do. One other thought, it wouldn't be a direct short as that would have tripped the breaker, however there is voltage where it shouldn't be otherwise you would have never felt the current even with a missing ground. ~CA