Exactly 19.0 inches (482.6 mm). This includes the mounting "ears" of the equipment.
It guarantees that servers, networking gear, UPS systems, and patch panels from thousands of vendors are compatible with standard racks. Eia Eca-310-e Pdf
To help me point you toward the exact engineering data you need, what of the EIA/ECA-310-E standard are you trying to verify? Tell me if you are fabricating a custom enclosure , trying to resolve a mounting alignment issue , or looking for equivalent international standards (like IEC dimensions). Share public link Exactly 19
While often called the "19-inch rack," this refers to the front panel width of the equipment; the actual internal mounting rail opening is typically around 17.75 inches . To help me point you toward the exact
The standard dictates several critical dimensions that govern how equipment mounts into a rack enclosure.