Power Connection Guidelines For Ac-Powered Systems; Power Connection Guidelines For Dc-Powered Systems - Cisco Catalyst 6840 Series Hardware Installation Manual

Preparing for Installation
• The AC-input power supply has a detachable power cord that allows you to connect each power supply
• Plug the DC wiring connector into the inlet receptacle at the rear of the chassis. For a DC installation,
• If you are using a 200/240 VAC power source in North America, the circuit must be protected by a
• The source AC outlet must be within 6 feet (1.8 meters) of the system and should be easily accessible.
• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding

Power Connection Guidelines for AC-Powered Systems

This section provides the basic guidelines for connecting the switch AC power supplies to the site power
source:
• Each chassis power supply should have a separate, dedicated branch circuit.
• For North America:
• For International:
• If you are using a 200/240 VAC power source in North America, the circuit must be protected by a
• The source AC outlet must be within 6 feet (1.8 meters) of the system and should be easily accessible.
• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding

Power Connection Guidelines for DC-Powered Systems

This section provides the basic guidelines for connecting the switch DC-input power supplies to the site power
source:
• All power connection wiring should conform to the rules and regulations in the National Electrical Code
• The DC return must remain isolated from the system frame and the chassis (DC-I).
• For DC power cables, we recommend that you use commensurately rated, high-strand-count copper wire
can cause the output voltage waveform to the switch to become distorted resulting in an undervoltage
situation in the system.
to the site power source.
you should secure the plug to the power supply by tightening both captive screws on the plug.
two-pole circuit breaker.
conductors that connect to the receptacles should connect to protective earth ground at the service
equipment.
• The 1100 W power supply requires a 10 A circuit, if the voltage is 110V.
• Circuits should be sized according to local and national codes.
two-pole circuit breaker.
conductors that connect to the receptacles should connect to protective earth ground at the service
equipment.
(NEC), as well as any local codes.
cable. Connection to the DC-input power supply requires one earth ground cable, one source DC (–),
and one source DC return (+). The length of the cables depends on your switch location. These cables
are not available from Cisco Systems. They are available from any commercial cable vendor.
Power Connection Guidelines for AC-Powered Systems
Catalyst 6840-X Switch Series Hardware Installation Guide
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