I am having a NEMA 14-50 outlet installed in my garage in a few hours and notice that the picture on the charging page of the Tesla website shows the NEMA plug with the ground socket "on top". Since I don't have such a plug in my house currently, I don't know if this is the norm or not. I do know that this is opposite of a standard 120V plug. Why do I care? Because I want the charging cable to hang correctly when plugged in (hanging down vs pointing up). Can someone who's had theirs installed take a look and clue me in? Thanks in advance.