According to the document, a fire endurance test and a fire shock and impact test are carried out. It provides for two levels of time to fire exposure (60 and 120 minutes) as well as three protection classes (DIS, D and P), using the maximum temperature increases and humidity values permitted within the storage space of the data cabinet. The test results thus permit a comparison of the fire endurance performance of cabinets of different design, and a classification to a certain protection class.