Most engineering-grade equipment has a panel width of 19 inches and a mounting hole distance of 465 mm. Therefore, as long as the cabinet can meet the installation of most 19-inch equipment, this cabinet is a standard cabinet. 1 inch = 25.4mm 19 inches = 482.6mm. The appearance of a 19-inch standard cabinet has three general indicators: width, height, and depth. The physical width of the cabinet is usually 600mm and 800mm. The height is generally from 0.7M to 2.4M, depending on the number of devices in the cabinet and the uniform style.
The height of equipment installation in a 19-inch standard cabinet is represented by a special unit U, 1U = 44.45mm. u refers to the effective use of space inside the cabinet. The panels of standard equipment using 19-inch standard cabinets are generally manufactured according to the specifications of n U. For some non-standard equipment, most can be installed into a 19-inch chassis and fixed by an additional adapter baffle. 42U cabinet is a common standard cabinet. Except for 42U standard cabinet, 47U cabinet, 37U cabinet, 32U cabinet, 20U cabinet, 12U cabinet