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Preparing for Installation
Site Power Guidelines
The Cisco NCS 4201 have specific power and electrical wiring requirements. Adhering to these requirements
ensures reliable operation of the system. Follow these precautions and recommendations when planning your
site power for the Cisco NCS 4201:
• The redundant power option provides a second, identical power supply to ensure that power to the chassis
• Connect each of the two power supplies to a separate input power source. If you fail to do this, your
• To prevent a loss of input power, be sure that the total maximum load on each circuit supplying the power
• Check the power at your site before installation, and periodically after installation to ensure that you are
• Provide proper grounding to avoid personal injury and damage to the equipment due to lightning striking
Caution
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.
Note
The Cisco NCS 4201 installation must comply with all the applicable codes, and is approved for use with
copper conductors only. The ground bond-fastening hardware should be of compatible material and preclude
loosening, deterioration, and electrochemical corrosion of hardware and joined material. Attachment of the
chassis ground to a central office or other interior ground system must be made with a 6-AWG gauge wire
copper ground conductor at a minimum.
For information on power specifications, see table Power Supply Specification.
Electrical Circuit Requirements
Each Cisco NCS 4201 requires a dedicated electrical circuit. If you equip the chassis with dual-power feeds,
provide a separate circuit for each power supply to avoid compromising the power redundancy feature.
The Cisco NCS 4201 can be powered by a DC source or an AC source. Ensure that equipment grounding is
present and observe the power-strip ratings. Make sure that the total ampere rating of all the products plugged
into the power strip does not exceed 80% of the rating.
Site Cabling Guidelines
This section contains guidelines for wiring and cabling at your site. When preparing your site for network
connections to the Cisco NCS 4201, consider the type of cable required for each component, and the cable
limitations. Consider the distance limitations for signaling, electromagnetic interference (EMI), and connector
compatibility. Possible cable types are fiber, thick or thin coaxial, foil twisted-pair, or unshielded twisted-pair
cabling.
continues uninterrupted if one power supply fails or input power on one line fails.
system might be susceptible to total power failure due to a fault in the external wiring or a tripped circuit
breaker.
supplies is within the current ratings of the wiring and the breakers.
receiving clean power. Install a power conditioner, if necessary.
power lines or due to power surges. The chassis ground must be attached to a central office or other
interior ground system.
Cisco NCS 4201 Hardware Installation Guide
Site Power Guidelines
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