I have been in the trade for 22 years and worked in several states but this amazed me.

Which way is up?
When you mount a 120v duplex receptacle do you put the ground socket to the top or bottom?

I don't recall any code references to this.
And I have seen a few installations with the ground socket to the top, but predominantly
the ground is down. ('.')
('.')
It's seems I remember way back when that I was told this was accepted as good workmanship, that if someone stepped on a cord it would be pulled downward, minimizing the chance that gnd would break first even though it's longer.

Here's the kicker, I did a job, but wasn't there when the inspector showed. Was written up and told receptacles all had to be flipped over(ground on top). Why? I was told it was a local ordinance and was implemented because with the ground on top a cord has more support and less tendency to fall out.

This is news to me and sounds ridiculous.

What do you think? Please include the state your in.