Power Connection Guidelines For Dc-Powered Systems - Cisco Catalyst 9400 Series Hardware Installation Manual

Preparing for Installation
• Ensure that the AC-input power supply module has a detachable power cord.
• Each chassis power supply should have a separate, dedicated branch circuit.
• If you are using a 208 or 240 VAC power source in North America, note that such lines are considered
• The source AC outlet must be within 9.84 to 14 feet (3.0 to 4.293 meters) of the system - depending on
• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding

Power Connection Guidelines for DC-Powered Systems

When connecting DC-input power supply modules to the site power source, observe the guidelines described
here.
• North America
• C9400-PWR-3200AC only—Power supply modules require a 20 A circuit.
• C9400-PWR-2100AC only—Power supply modules require a 15 A circuit.
• International—Circuits should be sized according to local and national codes.
hot and the circuit must be protected by a two-pole circuit breaker.
Warning
This product relies on the building's installation for short-circuit (overcurrent)
protection. Ensure that the protective device is rated not greater than these values
for the U.S. and EU:
• 20 A circuit breaker for an AC-input power supply module.
• 50 A DC-rated circuit breaker for each input of a DC-input power supply
module, for safety purposes - irrespective of whether the inputs are power
from a single or separate DC sources.
Statement 1005
Warning
This product requires short-circuit (overcurrent) protection, to be provided as
part of the building installation. Install only in accordance with national and local
wiring regulations. Statement 1045
Warning
A readily accessible two-poled disconnect device must be incorporated in the
fixed wiring. Statement 1022
the length of the power cord, and should be easily accessible.
conductors that connect to the receptacles should connect to protective earth ground at the service
equipment level.
Power Connection Guidelines for DC-Powered Systems
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
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