@ivesen Also there was an electrician here for a routine (required every 5-10 years I think?) inspection only about a month ago. I'm fairly certain they'd notice if my entire apartment turned out to not be grounded
@quad if you measure the voltage between a phase and ground you'll know, if it's grounded you'll have 0 or 120(ish) volts if it's not grounded you'll likely see a few millivolts depending on the length of the ungrounded wire
I've tried digging through the manuals and crap and it doesn't seem like there's any kind of multi-phase power support to disable. And I've at least quintuple-checked that the power settings are in fact 230V and 50Hz. Which are the only two settings it has under "input"
either my entire house (including bathroom and laundry room) is in actuality not grounded, or my apartment has magical single-phase power that is reversed