You would think electrical tape is easy to apply, wouldn't you? Day after day, I see tape installed wrong. If you must use it, firmly wrap the tape around the electrical wire and don't stretch it too tightly. Once you have three or four wraps around the wire, cut it with scissors. Don't pull it hard and tear it off. The tape in the second picture has been wrapped too tightly and torn off. When the tape heats up at extreme temperatures, it loses its stickiness and the tension from being overstretched will cause it to separate, eventually leading to exposed bare wire. Properly applied electrical tape will hold in place twice as long as tape that's not.