223V+ on 208Y/120V 3P/4W Common?

[mightymx]

I am trying to verify the supply voltage to a commercial building in the US (I am having no luck getting in contact with the electrical company). I believe it is supposed to be 208V, however when I check the line-line voltages, all three are reading 223-224V. Is it common for 208V to be supplied this much higher? The panel is labeled 208Y/120V 3P/4W, 225 amps. All three line-neutral voltages are 129-131V. Can someone confirm the nominal supply voltage is 208V based on the information I have provided. Thank you!

 

[waross]

That is a 120Volt system running about 6% high.
Some utilities like to keep the voltage a little on the high side to increase billing.
When I was the system engineer for a small island utility, I lost that fight with the General Manager.
The voltage stayed high.