Cisco Nexus 93180YC-FX3 Installation Manual page 14

Planning for Power Requirements
• Two 930-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 650 W (AC power supplies) but the switch requires less than
that amount 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 500 W of power input from the power source, but you must provision as much as 625
W of 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 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
Cisco Nexus 93180YC-FX3 ACI-Mode Switch Hardware Installation Guide
8
Power Cable Specifications, on page
Preparing the Site
47.