Power supplies often accept an input range of 90-264Vac. I am wondering where the 264 comes from.
A couple of random examples from power supplies available:
- 85 - 264 Vac input range (100 - 240 Vac nominal)
- Takes universal inputs (90-264 Vac, 47/63 Hz)
- External Power Supply 90 to 264 VAC
- Input voltage 90-264Vac
I understand that large parts of the world are 220-230V. I also understand that 277V may be available, as well as 208V.
But where exactly is the 264Vac limit from?