• Two separate and independent AC or DC power sources are needed to provide 2N redundancy for system
power. Each power source requires its own circuit breaker.
• Each power source must provide clean power to the site. If necessary, install a power conditioner.
• The site must provide short-circuit (over-current) protection for devices.
• Proper grounding is required at the site to ensure that equipment is not damaged by lightning and power
surges. In addition:
• Chassis grounding is required for AC and DC-powered systems.
• For AC-powered systems, a grounding-type AC power outlet is required.
• Site power planning must include the power requirements for any external terminals and test equipment
you will use with your system.
AC Power Requirements
In addition to the requirements in the
General Power and Grounding Requirements, on page 54
, AC input
power requirements are as follows:
• An AC-powered chassis requires up to a maximum of 12,000 watts (for NCS 4016) of AC input power
when the chassis is fully loaded.
• Two separate and independent AC power sources are required for N+N redundancy, one for each power
shelf. Each power shelf should be connected to a different power source to provide 2N power redundancy
in case a power source fails. The system will operate with power to only one shelf but will not have N+N
redundancy.
• Each AC power source must provide single-phase AC power, and have its own circuit breaker.
• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding
conductors that connect to the receptacles should connect to protective earth ground at the service
equipment.
• AC single-phase input:
• Single-phase, 200 to 240 VAC nominal, 50 to 60 Hz, 17A maximum.
• Each AC power shelf contains four specific single phase AC inlet connectors. These connectors can
accept four AC power cords provided by Cisco. AC power cords provided by Cisco can have a
IEC-309 plug 32A rated for International power systems, or a NEMA L6-30P plug 30A rated for
North America Power Systems.
The external breaker current rating can be less than 30A, depending on the chassis configuration. Please refer
to the national installation rules for the correct rating of the breakers or fuses.
Note
DC Power Requirements
Observe the following guidelines for DC-powered shelves. In addition, be sure to review the requirements
described in the
General Power and Grounding Requirements, on page 54
.
• A DC-powered chassis requires up to a maximum of 12,250 watts (for NCS 4016) of DC input power
when the chassis is fully loaded.
• All power connection wiring must conform to the rules and regulations in the National Electrical Code
(NEC) and any local codes. In addition, make sure that the wiring conforms to any internal requirements
at the installation site.
Hardware Installation Guide for the Cisco NCS 4000 Series
55
Installing Power Components
AC Power Requirements
Summary of Contents for NCS 4000 Series
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