Abstract: At approximately 7:30 a.m. on March 6, 2013, an employee was working for Dignity Health, dba Mercy Hospitals of Bakersfield, CA. The employer was a hospital serving the Bakersfield and Kern county markets for in-house and outpatient treatment. The hospital also had an emergency treatment area that was always open. Employee #1 was a fulltime permanent employee of the hospital. His occupation was not provided. Employee #1 was using test equipment intended for use at voltages of no higher than 750 volts to test the fuses in a 12 kV electrical panel. The panel was a Square D panel, with Serial Number 49H-50427. It controlled a General Electric 12 kV transformer. When Employee #1 touched a fuse with the tester's electrodes, an arc flash occurred. Employee #1 was knocked back approximately 6 feet (1.8 meters), and he sustained burns. Among the causal factors was that Employee #1 was not a qualified employee, certified to work on such a high voltage. Further, he was using equipment rated at 750 volts to check a fuse on a 12 kV line. The employer notified the Division at 10:00 a.m. that same day.