I am have spent a LOT of time in data centers, but that doesn’t mean I always remember all the details.

Recepticle types:
L5-20 = power outlet you have at home {add pictures}. 120V with up to 20A draw (16A safe {80%})
L6-20 = 208V, 20A
L6-30 = 208V, 30A
Add in the exadata fiasco here (60A!!)

KVA v. Watts
Bascially, Watts is a meausre of max power, KVA is complicated, but is a better number as it accounts for resistance, heat and other imprefections of this imperfect world.