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Installing the Cisco NCS 4201
This equipment is intended to be grounded to comply with emission and immunity requirements. Ensure
Warning
that the switch functional ground lug is connected to earth ground during normal use. Statement 1064
The plug-socket combination must be accessible at all times, because it serves as the main disconnecting
Warning
device. Statement 1019
This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation.
Warning
Install only in accordance with national and local wiring regulations. Statement 1045
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
• The circuit must be protected by a dedicated two-pole circuit breaker. The circuit breaker should be
• 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:
• Each chassis power supply should have its own dedicated branch circuit.
• The circuit breaker should be sized according to the power supply input rating and local or national code
• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding
Installing a DC Power Supply
The following sections describe how to install a DC power supply in the Cisco NCS 4201:
with the safety extra-low voltage (SELV) requirements in the UL 60950, CSA 60950, EN 60950, and
IEC 60950 standards.
sized according to the power supply input rating and local or national code requirements.
requirements.
conductors that connect to the receptacles should connect to protective earth ground at the service
equipment.
Installing a DC Power Supply
Cisco NCS 4201 Hardware Installation Guide
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