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Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide
OL-5802-06
Chapter 2 Power and Cooling
General Power and Grounding Requirements
• An AC-powered chassis requires 8,750 watts of AC input power.
Note These power requirements are for a fully loaded chassis with eight PLIMs. A chassis with six or
seven
PLIMs uses slightly less power. However, it is a good idea to allocate this much power for each
chassis to ensure that enough power is available for future system expansion.
See the Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis System Description for detailed
information about how each power system operates and distributes power to components in the chassis.
General Power and Grounding Requirements
This section describes the power and grounding requirements you must consider when planning the site
facilities for the routing system. In addition, see the
“DC Power Requirements” section on page 2-3 or
the “AC Power Requirements” section on page 2-6 for additional information about the power
requirements for your chassis type.
Note A qualified electrician should review the information in these sections to ensure that the installation site
meets these requirements. For larger system configurations, you may want to consult a facilities
electrical expert to understand the load that the routing system may put on the facility power plant.
• Installation of the routing system must follow national and local electrical codes:
• In the United States: United States National Fire Protection Association (NFPA) 70 and United
States National Electrical Code (NEC).
• In Canada: Canadian Electrical Code, part I, CSA C22.1.
• In other countries: International Electrotechnical Commission (IEC) 60364, parts 1 through 7.
• 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 be providing 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:
• For AC-powered systems, a grounding-type AC power outlet is required.
• For DC-powered systems, each DC PDU requires a connection to earth ground.
• When planning the power for the site, be sure to include the power requirements for any external
terminals and test equipment you will use with your system.
Note Be sure to review the safety warnings in Regulatory Compliance and Safety Information for the Cisco
CRS-1 Carrier Routing System before attempting to install the routing system.