I've only seen 220-240v here in Thailand so far. The past two places I've been (khao sok and koh tao) show 250v and 260v faceplates on the outlets though. Can anyone shed some light onto this? I was under the assumption that the outlets can only output as much power as the generator provides them, and something tells me all of koh tao isn't running on 260v.
The faceplate probably means nothing, probably is just the cheapest outlet they could find.
I am surprised you are seeing such a thing as to my knowledge no countries use 260 volt power, that is why almost all chargers only go from 110-240 volts.
If in doubt ask the owner. I know I charged items at Khao Sok and had no issues.
@Geer1 I'm surprised as well - however the hostel I'm staying in koh tao also shows a 250v faceplate, and my camera battery has certainly been acting sketchily lately. Not sure if it just happens to be a coincidence that the past 3 residences I've stayed at have showed 250 and 260v faceplates or if this voltage is actually being used.
Nowhere uses 250 or 260v