When plugging an AC to DC converter into an AC outlet, does it make any difference at all if the wall wort is "upside down" or "rightside up"? Is there anything about the electrical design that would result in the orientation making any difference?
Most of the time, there is an obvious "rightside up" where all the writing is in one direction, and the AC plugs are closer to the top.
I would assume that the answer is independent of what the AC to DC converter powers. Is that assumption correct?
Does it make any difference at all when the AC to DC converter is powering computerized "smart" DC battery chargers?
In all the above, assume each converter has two AC prongs of the same size (none wider than the other) and each converter only has two prongs (no separate ground prong).