handyandy posted:No dumb questions, but there can be dumb answers.
Case in point:
Try touching your tongue across the terminals of a 9 volt battery. You can get quite a tingle from just 9 volts. 18 to 22 volts could be a real kick! Not that the cat would be sticking its tongue across the rails, but with cats one never knows. I have found tinsel encased in the stuff in the litter box before.
Your cat wont be doing it a second time. It may cause her to jump but little more. Farmers have been using electrified fencing for decades and I know of no dead cows, dogs, dear, OR CATS for that matter from such fencing.