Power sent directly to the tape will burn the plastic. With most horses, the first touch communicates the fence's message. Watch the horse's reaction before leaving him alone within the fence. Maintain your fence for reliable performance. Realize that weather affects your fence's integrity.
Strong winds can cause the strands to flap loose.
Check that they remain secure inside insulators. Sunlight bleaches and weakens vinyl polymer. Buy fencing with UV inhibitors, and look for a 20-year guarantee. Lightning transmission through the power line can damage the fence. You can install a lightning arrestor system.