TWO WORKERS TOOK THE COVER OFF THE BATTERY MOTORTO CHANGE FUSE FOR COMPRESSOR MOTOR. AFTER CHANGING FUSE THEY RESET BREAKER AND COMPRESSOR DIDN'T RUN SO THEY PUT OLD FUSE BACK IN AND SET THE BREAKER. EMPLOYEE WAS ON OPPOSITE SIDE OF MOTOR & CAME IN CONTACT WITH COVER OVER BATTERY LEADS.THE RESULTING ARK MELTED COVER CAUSING A CUT TO RIGHT ARM & FLASH BURNS TO ARMS, FACE, ABDOMEN.