Cisco 5000 Series - Manual (Page 110)

S e n d d o c u m e n t a t i o n c o m m e n t s t o n e x u s 5 k d o c s @ c i s c o . c o m
A-2
Cisco Nexus 5000 Series Hardware Installation Guide
OL-15902-01
Appendix A Cabinet and Rack Installation
Cabinet and Rack Requirements
General Requirements for Cabinets and Racks
The cabinet or rack must be one of the following types:
• Standard 19-in. (48.3 cm) (four-post EIA cabinet or rack, with mounting rails that conform to
English universal hole spacing per section 1 of ANSI/EIA-310-D-1992. See the
“Requirements
Specific to Perforated Cabinets” section on page A-2 and the “Requirements Specific to
Solid-Walled Cabinets” section on page A-3 .
The cabinet or rack must also meet the following requirements:
• The minimum vertical rack space per 5020 chassis must be two RU (rack units), equal to 3.50 inches
(8.9 cm).
• The minimum vertical rack space per 5010 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 (45.1 cm) if the rear of the
switch is not attached to the rack. For four-post EIA racks, this is the distance between the two front
rails.
• For four-post EIA cabinets (perforated or solid-walled):
– The minimum spacing for the bend radius for fiber-optic cables should have the front-mounting
rails of the cabinet offset from the front door by a minimum of 3 inches (7.6 cm), and a
minimum of 5 inches (12.7 cm) if cable management brackets are installed on the front of the
chassis.
– The distance between the outside face of the front mounting rail and the outside face of the back
mounting rail should be 23.5 to 34.0 inches (59.7 to 86.4 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
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.
Note Optional jumper power cords are available for use in a cabinet. See the “Jumper Power Cord”
section on page C-12 .
Requirements Specific to Perforated Cabinets
A perforated cabinet is defined here as a cabinet with perforated front and rear doors and solid side walls.
In addition to the requirements listed in the
“This section includes the following topics:” section on
page 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 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 .