A server rack UPS system is an uninterruptible power supply designed to be installed within a 19inch server rack or cabinet. Many applications require special equipment and settings of the UPS systems. It doesn't matter whether you. Is it safe to put a UPS in a cabinet with little ventilation? I just built a whitebox and due to several constraints had to put it near my entertainment center. See the. Back in the good old days, we had power filters, capacitive filters, metal oxide varistors (MOVs), coil suppression and free-wheeling diodes on dc coils. Perform one of the following once the UPS is in its final position: Lower the leveling feet until the casters no longer have contact with the floor, OR Reinstall the front transportation bracket (870-32577) on the UPS and mount it to the floor, OR Install.