This standard specifies the basic size series of narrow cabinets, subracks and plug-ins with a height system of 44.45mm and a panel width of less than 482.6mm. This standard is mainly applicable to communication equipment installed in narrow cabinets or narrow racks, and also applicable to other types of electronic equipment installed in cabinets or racks with a panel width less than 48.26mm.
GB/T 3047.8-1996 history
1996GB/T 3047.8-1996 Series of basic dimension of narrow cabinets for vertical increment of 44.45mm