Originally Posted by Glock
I'm confused now (or have been) Don't I want the reading to be open between the hot/neutral to the ground. Otherwise it would mean current would be flowing through the ground causing the trip?
Sorry if I confused - yes you are right you want no continuity between hot/neutral and ground.
What I meant was maybe you had a stray wire (as in one strand of the wire not the whole thing) touching ground that you missed.
Another thing to check is making sure you don't have any transposed nuetral/ground by accident - either in the panel, although I don't expect it since you say a hairdryer works ok, or in the cord going to the RIMS element - i.e. Check the point-point continuity from the plug to the terminal screws/ground on the element and make sure the hot/neutral/ground are where you think they are.