yorkhung wrote:The only reason why I know is because when the circuit breaker tripped. The garage light and door goes out with it. I also find some 120V plug loses power with the 240 Dryer circuit breaker tripped. I don't know if the previous owner did anything special to have both 120V and 240V work on the same breaker. By the way, the breaker uses two slot so maybe that's why.
It seems clear to me that a previous owner did some DIY work in violation of the electrical code, and you now have a mess that needs to be cleaned up by a professional. Until you can get that done I would strongly urge you to use only 120v charging at home for your LEAF.
It will probably be expensive to correct the problems, but losing your house would be a lot more expensive. Get it done ASAP.
P.S. For the more electrically experienced here, anyone who would tap a dryer circuit to run a garage door opener is likely to have done other things that are unsafe. I'm sure yorkhung was working with the best of intentions, but his comments (e.g. about using two slots) make it clear that he is a novice. I do not think we should encourage him to address the problems created by the previous owner himself.