Forget the 120 volts. 25,000 volts burns through a lot more fur.
If you want to keep bears out of the yard, take a couple of cans of sardines, punch a hole through the middle and run a bare wire through the can, tie it onto one of the electric hot wires. The bear can sell it from a long way away and will come to it. , When the bear bites the can, he gets a shock inside the mouth and once is enough.
Put something on the fence wires so the bear can associate the markers with the shock. I use aluminium duct tape and small rings of PVC 1-1/2" pipe. Cut the rings and then split them so the can be slipped over the wire.
Oh, the bears are not really after the honey, they eat the larva. They will attack a colony even if it does not have honey in it.