An ultrasonic surgical device has a hand piece, a probe, and an electromechanical transducer assembly disposed inside the hand piece. The probe is mounted to a distal end of the hand piece and is operatively connected to the transducer assembly. An electrical connector is mounted at least indirectly to the hand piece, while an electrical circuit electrically or operatively connects the probe to the electrical connector. A wire or cable is operatively coupled at one end to the electrical connector and at an opposite end to electrical ground.