Rack Requirements - Cisco UCS C480 M5 Installation And Service Manual

Installing the Server
Warning
This equipment must be externally grounded using a customer-supplied ground wire before power is
applied. Contact the appropriate electrical inspection authority or an electrician if you are uncertain
that suitable grounding is available.
Statement 366
Caution
To ensure proper airflow it is necessary to rack the servers using rail kits. Physically placing the units on top
of one another or "stacking" without the use of the rail kits blocks the air vents on top of the servers, which
could result in overheating, higher fan speeds, and higher power consumption. We recommend that you mount
your servers on rail kits when you are installing them into the rack because these rails provide the minimal
spacing required between the servers. No additional spacing between the servers is required when you mount
the units using rail kits.
Caution
Avoid uninterruptible power supply (UPS) types that use ferroresonant technology. These UPS types can
become unstable with systems such as the Cisco UCS, which can have substantial current draw fluctuations
from fluctuating data traffic patterns.
When you are installing a server, use the following guidelines:
• Plan your site configuration and prepare the site before installing the server. See the
• Ensure that there is adequate space around the server to allow for accessing the server and for adequate
• Ensure that the air-conditioning meets the thermal requirements listed in the
• Ensure that the cabinet or rack meets the requirements listed in the
• Ensure that the site power meets the power requirements listed in the

Rack Requirements

The rack must be of the following type:
• A standard 19-in. (48.3-cm) wide, four-post EIA rack, with mounting posts that conform to English
• The rack-post holes can be square 0.38-inch (9.6 mm), round 0.28-inch (7.1 mm), #12-24 UNC, or #10-32
• The minimum vertical rack space per server must be four rack units (RUs), equal to 7.0 in. (177.8 mm).
Preparation Guide for the recommended site planning tasks.
airflow. The airflow in this server is from front to back.
on page 127.
If available, you can use an uninterruptible power supply (UPS) to protect against power failures.
universal hole spacing, per section 1 of ANSI/EIA-310-D-1992.
UNC when you use the Cisco-supplied slide rails.
Rack Requirements, on page
Cisco UCS C480 M5 Server Installation and Service Guide
Rack Requirements
Cisco UCS Site
Environmental Specifications,
Power Specifications, on page
15.
128.
15