Use the information in the DC Power Supply Specifications table to estimate the power requirements and heat
dissipation of a Cisco NCS560-4 Router based on a given configuration of the router. Determining power
requirements is useful for planning the power distribution system needed to support the router.
Power Connection Guidelines
This section provides guidelines for connecting the Cisco NCS 560-4 Router power supplies to the site power
source.
Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground
conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that
suitable grounding is available. Statement 213
Warning
The plug-socket combination must be accessible at all times because it serves as the main disconnecting
device. Statement 1019
Warning
The above statement is applicable only to the AC power supplies.
Note
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
Guidelines for DC-Powered Systems
Basic guidelines for DC-powered systems include the following:
• Each chassis power supply should have its own dedicated input power source. The source must comply
with the safety extra-low voltage (SELV) requirements in the UL 60950, CSA 60950, EN 60950, and
IEC 60950 standards.
• The circuit must be protected by a dedicated two-pole circuit breaker. The circuit breaker should be sized
according to the power supply input rating and local or national code requirements.
• The circuit breaker is considered the disconnect device and should be easily accessible.
• The system ground is the power supply and chassis ground.
• Do not connect the DC return wire to the system frame or to the system grounding equipment.
• Use the grounding lug to attach a wrist strap for ESD protection during servicing.
Guidelines for AC-Powered Systems
Basic guidelines for AC-powered systems include the following:
Cisco NCS 560-4 Router Hardware Installation Guide
67
Installing the Cisco NCS 560-4 Router
Power Connection Guidelines
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