Cisco Nexus 3000 Series Hardware Installation Manual page 37

Installing the Chassis
• The installation site meets the following requirements as stated in Chapter 2:
• Environmental requirements for temperature, humidity, altitude, and air particulates.
• Cabinet or rack is installed and meets the requirements for the switch.
Note Jumper power cords are available for use in a cabinet.
• 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.
Warning
High leakage current. Earth connection essential before connecting to power
supply.
• 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.
Caution Avoid UPS types that use ferroresonant technology. These UPS types can become
unstable with systems such as the Cisco Nexus 3000 Series switches. These
switches can have substantial current draw fluctuations because of fluctuating
data traffic patterns.
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.
Caution
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:
Note For DC input application, please refer to the statement below:
Cisco Nexus 3000 Series Hardware Installation Guide
Preparing to Install the Chassis
29