Chapter 2 Preparing for Installation
Site Requirement Guidelines
2-16
Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
Power Connection Guidelines for DC-Powered Routers
Be sure to observe the following guidelines for DC-powered Cisco 12006 and
Cisco 12406 Routers:
• Cisco 12006 and Cisco 12406 Routers with a DC PDU and DC-input power
entry modules (PEMs) require an external DC circuit breaker for each DC
power source:
–
Original series Cisco 12006 and Cisco 12406 router input power shall not
draw more than 45A max. @ 40.5VDC form each DC power source.
–
Enhanced series Cisco 12006 and Cisco 12406 router input power shall
not draw more than 60A max. @ 40.5VDC from each DC power source.
This circuit breaker should protect against short-circuit and overcurrent faults
in accordance with United States National Electrical Code NFPA 70 (United
States), Canadian Electrical Code, part I, CSA C22.1 (Canada), and IEC 364
(other countries).
• Provide a dedicated power source for each power entry module installed in
the router.
• Install an uninterruptable power source where possible.
Grounding Connections
Before you connect power or turn on your Cisco 12006 or Cisco 12406 Router,
you must provide an adequate system ground for the router. The equipment
grounding should be in accordance with local and national electrical codes.
For installations other than in a network equipment building system (NEBS)
environment, you may chose to rely on the safety earth ground connection
supplied via the International Electrotechnical Commission (IEC) 320 inlets for
AC-powered units and the main terminal block ground connection for
DC-powered units.
• On Cisco 12006 and Cisco 12406 Routers configured for AC-input
operation, the AC PDU is equipped with two three-wire electrical
grounding-type connectors that accept three-wire, grounding-type AC power
cords such as the power cords shipped with the router. This is a safety feature.