An adjustable bracket for enclosing an open frame power supply unit (PSU) is disclosed. The adjustable bracket includes a first bracket section having a first primary plate and a first secondary plate extending generally vertically from one end of the first primary plate; and a second bracket section having a second primary plate and a second secondary plate extending generally vertically from one end of the second primary plate, the first secondary plate and the second secondary plate being generally parallel such that the first secondary plate faces the second secondary plate. The second primary plate is movably coupled to the first primary plate such that the adjustable bracket can be in a compact, intermediately extended, or fully extended configuration by adjusting the bracket according to a width of the open frame PSU, the width being different for a first open frame PSU than for a second open frame PSU.