Cisco Nexus 9336C-FX2-E Hardware Installation Manual page 14

Planning for Power Requirements
• Two 1100-W DC power supplies
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.
The power supplies are rated to output up to 1100 W, but the switch requires less than those amounts of power
from the power supply. To operate the switch, you must provision enough power from the power source to
cover the requirements of both the switch and a power supply. Typically, this switch and a power supply
require about 367 W of power input from the power source, but you must provision as much as 777 W power
input from the power source to cover peak demand.
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 when using AC power supplies
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 1005 Circuit Breaker when using DC power supplies
This product relies on the building's installation for short-circuit (overcurrent) protection.
• Ensure that the protective devices are rated not greater than 40A when the switch is powered with regular
• Ensure that the protective devices are rated not greater than 35A when the switch is powered with regular
• Ensure that the protective devices are rated not greater than 10A when the switch is powered with regular
Cisco Nexus 9336C-FX2-E ACI-Mode Switch Hardware Installation Guide
8
DC power supplies (SPDCSCO-74/SPDCSCO-35G).
DC power supply (700-013838-1200).
HVDC power supply (700-013761-xxxx).
Preparing the Site