Standard mains voltages vary across the world, for both practical and political reasons. Here are some examples
UK 230 -6%/+10% (216.2–253) 50Hz
EU (possibly not RoI) 230 -10%/+6% (207–243.8) 50Hz
US 120 +-/5% (114–126) 60Hz
India 220 or 230 (I need to do more research) 50Hz
And so on. One thing is for sure: nowhere in the world distributes bulk power at 1kHz (the default frequency for an AC signal in the simulator).
These are RMS values - multiply by √2 (1.414) for peak values (amplitude in the simulator). For three phase, multiply interphase by √3 (for RMS, and then by √2 for peak) for voltages from phase to common.
