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Installing the Chassis
• The rack is positioned so that you can install the switch with its cold air intakes positioned in a cold aisle.
If the fan and power supply modules are burgundy or red colored, you must install the chassis with its
port side in a cold aisle. If the modules are blue colored, you must be able install the chassis with the fan
modules in a cold aisle.
• Earth ground connection is close to the switch. You must be able to easily connect the switch directly to
an earth ground or indirectly through a grounded rack.
• Site power meets the switch requirements. If you are using n+n redundancy, you must have two power
sources within reach of the switch when it is installed in the cabinet or rack.
If available, you can use an uninterruptible power supply (UPS) to protect against power failures.
Ensure that circuits are sized according to local and national codes. For North America, the power supply
requires a 15-A or 20-A circuit.
Package Contents
The Nexus 3550-T box should contain the following items:
• Nexus 3550-T box
W a r n i n g
High leakage current. Earth connection essential before connecting
to power supply.
Caut i o n
Avoid UPS types that use ferroresonant technology. These UPS types
can become unstable with systems such as the Cisco Nexus 3550-T
Triton switches. These switches can have substantial current draw
fluctuations because of fluctuating data traffic patterns.
Caut i o n
To prevent loss of input power, ensure the total maximum loads on
the circuits supplying power to the switch are within the current
ratings for the wiring and breakers.
Note
For AC input application, please refer to the statement below:
W a r n i n g
Statement 1005 Circuit Breaker
This product relies on the building's installation for short-circuit
(overcurrent) protection. To reduce risk of electric shock or fire,
ensure that the protective device is rated not greater than:
20 A
Preparing to Install the Chassis
Cisco Nexus 3550-T Hardware Installation Guide
11
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