Requirements Specific To Perforated Cabinets; Requirements Specific To Standard Open Racks - Cisco Nexus 2000 Series Hardware Installation Manual

Cabinet and Rack Requirements
The cabinet or rack must also meet the following requirements:
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Note

Requirements Specific to Perforated Cabinets

A perforated cabinet is defined as a cabinet with perforated front and rear doors and solid side walls. In
addition to the requirements listed in the
page
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The Cisco R Series rack conforms to these requirements.

Requirements Specific to Standard Open Racks

In addition to the requirements listed in the
page
the following requirements:
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Cisco Nexus 2000 Series Hardware Installation Guide
A-2
The minimum vertical rack space per Cisco Nexus 2000 Series FEX chassis must be one RU (rack
units), equal to 1.75 inches (4.4 cm).
The minimum vertical rack space per chassis must be one RU (rack unit), equal to 1.75 inches (4.4
cm).
The width between the rack-mounting rails must be at least 17.75 inches (45.0 cm) if the rear of the
device is not attached to the rack. For four-post EIA racks, this measurement is the distance between
the two front rails.
For four-post EIA cabinets (perforated or solid-walled), the requirements are as follows:
The minimum spacing for the bend radius for fiber-optic cables should have the front-mounting
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rails of the cabinet offset from the front door by a minimum of 3 inches (7.6 cm).
The distance between the outside face of the front mounting rail and the outside face of the back
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mounting rail should be 23.0 to 30.0 inches (58.4 to 76.2 cm) to allow for rear-bracket
installation.
A minimum of 2.5 inches (6.4 cm) of clear space should exist between the side edge of the
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chassis and the side wall of the cabinet. No sizeable flow obstructions should be immediately
in the way of chassis air intake or exhaust vents.
Optional jumper power cords are available for use in a cabinet. See the
section on page C-8.
A-1, perforated cabinets must meet the following requirements:
The front and rear doors must have at least a 60 percent open area perforation pattern with at least
15 square inches (96.774 square cm) of open area per rack unit of door height.
The roof should be perforated with at least a 20 percent open area.
The cabinet floor should be open or perforated to enhance cooling
A-1, if mounting the chassis in an open rack (no side panels or doors), ensure that the rack meets
The minimum vertical rack space per chassis must be two rack units (RU), equal to 3.47 inches (8.8
cm).
The horizontal distance between the chassis and any adjacent chassis should be 6 inches (15.2 cm),
and the distance between the chassis air vents and any walls should be 2.5 inches (6.4 cm).
Appendix A
"General Requirements for Cabinets and Racks" section on
"General Requirements for Cabinets and Racks" section on
Cabinet and Rack Installation
"Jumper Power Cord"
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