Airflow Requirements - Cisco Nexus 9332D-GX2B Hardware Installation Manual

Airflow Requirements

Note For n+1 redundancy, you can use one or two power sources for the two power supplies. For n+n redundancy,
you must use two power sources and connect each power supply to a separate power source.
Note
Some of the power supply modules have rating capabilities that exceed the switch requirements. When
calculating your power requirements, use the switch requirements to determine the amount of power that is
required for the power supplies.
To minimize the possibility of circuit failure, make sure that each power-source circuit that is used by the
switch is dedicated to the switch.
Note
For AC input application, please refer to the following statement:
Warning
Statement 1005 Circuit Breaker
This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the
protective devices are rated not greater than 20A (North America), 16A (Europe), and 13A (UK).
Note
For DC input application, please refer to the following statement:
Warning
Statement 1033
Connect the unit only to DC power source that complies with the Safety Extra-Low Voltage (SELV)
requirements in IEC 60950 based safety standards.
Note We recommend 8-AWG wire for DC installations in the U.S.
Note
For the power cables to use with the power supplies, see
Airflow Requirements
The switch is positioned with its ports in either the front or the rear of the rack depending on your cabling
and maintenance requirements. You must have fan and power supply modules that move the coolant air from
the cold aisle to the hot aisle in one of the following ways:
Cisco Nexus 9332D-GX2B NX-OS Mode Switch Hardware Installation Guide
8
Power Cable Specifications, on page
Preparing the Site
37.