4-5
Cisco Network Convergence System 4000 Series Hardware Installation Guide
Chapter 4 Installing Power Components
General Power and Grounding Requirements
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 4-5
the
“AC Power Requirements” section on page 4-6
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, consult a facilities electrical expert to
understand the load that the routing system may put on the facility power plant.
General power and grounding requirements are:
•
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 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.
Note
Be sure to review the safety warnings in the Cisco Network Convergence System
Regulatory Compliance
and Safety Information for the Cisco Network Convergence System 4000 Series Routers
before
attempting to install the routing system.
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” section on page 4-5
•
A DC-powered chassis requires up to a maximum of 12,250 watts 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.
•
Each DC power source must comply with the safety extra-low voltage (SELV) requirements in
UL 60950-1, CSA-C22.2 No. 60950-1, EN60950-1, AS/NZS 60950, and IEC60950-1.