In case you were wondering, in some areas electricians install the receptacle ground side up, apparently there have been some cases where a paper clip or metal ruler slipped off the back of a desk and landed on the electrical plug prongs that were not inserted fully, causing a breaker to trip or a fire....
The paperclip behind the desk I heard before, then there's the 'screw fell out and the metal cover plate dropped' used more frequently in industrial construction. Kind of a stretch.
Kinda' bragging now, but being a devout cheap*** plus over half-century of the usual home repairs and maintenance I couldn't resist the county's provisions for bldg. permit to test as 'qualified installer' with electric rough-in. Wanting to protect from 'trick questions' I searched hi n lo for things that are 'preferred practice' but not actually code. This must be one of them 'cause nothing I found in NEC.
Since most all recepts. are below eye level, it's just plain easier plugging stuff in looking down and sticking in the one longer rod first and then just spinning a little to run the lugs home as you never have check which is the wider lug first. Exception being heavy appliances (fridge, washing machine) with their close clearance plugs usually molded in the direction of the ground. I'll install just those recepts. 'upside down'.
Right now I'm deciding which warring camp to join for the plumbing. Will it be 3/4" main trunk and 1/2" branches to each fixture, or individual 1/2" homeruns to every fixture. Not to mention, the same or different for hot and cold.