Lots of people use electric fence to keep predators away from chickens, not to keep chickens in. I have watched my chickens rub up against the electric line that makes my dog yelp; the chickens evidently don't feel it through the feathers. I don't know the voltage, sorry.
I have electric poultry netting for my goats. I decided to get poultry netting, so I can also fence my chickens in. It would work, if I didn't have gaps on the bottom, where they can squeeze through apparently without getting zapped
They could probably also fly over it, but I have not seen them try it, yet.