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But you also need to consider the external width of the. rack. The standard width for rack enclosures is 24 inches or 600 mm, which corresponds to the standard for removable floor. tiles in a raised-floor data center. Extra-wide rack enclosures (30 inches or 750 mm) are also available, with or without extra.
Many rack-mounted power systems and power supplies are specified as being 1U, 2U, 3U, etc. What does this mean? For electronic equipment racks (e.g., 19 or 23 inches wide), the term 1U is used to define one rack unit of height.To be precise, 1U equals 1.75-inches (44.45mm) of rack height. Therefore, a 2U rack mount height would be 2 x 1.75â, which equals 3.5-inches high. A 3U height would be 3 x 1.75â = 5.25-inches.or electronic equipment racks (e.g., 19 or 23 inches wide), the term 1U is used to define one rack unit of height. To be precise, 1U equals 1.75-inches (44.45mm) of rack height. Therefore, a 2U rack mount height would be 2 x 1.75â, which equals 3.5-inches high.