E WAS INSTRUCTED TO TEST AND REMOVE WIRING COMING OUT BOTTOM OF ELECTRICAL FAN BOX. EE STATED HE TESTED ALL WIRES AND TEST SHOWED THEY WERE NO HOT. EE REMOVED BOTTOM WIRE AS INSTRUCTED. HE STA RTED TOREMOVE TOP WIRE (WHICH HE WASNOT INSTRUCTED TO DO) AND RECEIVED FLASH BURNS TO RIGHT FOREARM AND LEFT WRIST AREAS. DIAGNOSED WITH FIRST DEGREE BURNS TO RIGHT FOREARM.