Chapter 2 Preparing for Installation
Installation Site Requirements
•Install an uninterruptable power source where possible.
Grounding Connections
Before you connect power or turn on your Cisco XR 12404 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
Site Wiring
This section offers site wiring guidelines for setting up the plant wiring and cabling at your site. When planning the location of the new system, consider the following:
•Electromagnetic interference (EMI)
•Distance limitations for signaling and unshielded conductors
Electromagnetic Interference
Electromagnetic interference can occur between the signal on the wires and external or ambient EMI fields when the wires are run for any significant distance. This fact has two implications for the construction of plant wiring.
•Bad wiring practice can result in radio interference emanating from the plant wiring.
Warning Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy the signal drivers and receivers in the Cisco XR 12404 Router, and can create an electrical hazard by conducting power surges through lines and may cause damage to the equipment.
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