Installation guide

2-10
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Chapter 2 Preparing to Install
Site Preparation
Electrical Power for AC Units
An AC power source must be available within 6 ft (1.8 m) of the system and easily accessible. Before
turning on the power, verify that the power supplied to the node comes from a dedicated branch circuit.
The power receptacles to which the node connects must be of the grounding type. The grounding
conductors that connect to the receptacles should connect to protective earth at the service equipment.
Electrical Power for DC Units
Only a 48-VDC supply that complies with the Safety Extra Low Voltage (SELV) requirements of
EN 60950 can connect to the IGX DC input.
For DC supply connections, consult local and national codes for proper conductor sizing. The conductors
must be suitable for 20 A. Wiring that is 10 to 12 AWG (4 sq mm) is adequate.
Bonding and Grounding
To maintain the full EMI and EMC integrity of this equipment, it must be bonded to an integrated ground
plane or an isolated ground plane network. In addition, the front card faceplate must be properly
installed. The purpose of this is to mitigate the damaging effects to equipment from electrostatic
discharge and lightning. Refer to the latest edition of ITU Recommendation K.27 or Telcordia
Technologies GR-1089-CORE requirements to ensure that the correct bonding and grounding
procedures are followed. As recommended in these documents, a frame bonding connection is provided
on the cabinet supplied by Cisco for rack-mounted systems and on the standalone cabinets.
Refer to the “Making the Frame Bonding (Ground) Connection” section on page 2-35 for information
on the locations of the frame bonding connections and how to make a connection.
Except for the AC power supply module, every module in a rack-mount system relies on the rack itself
for grounding. Therefore, the rack must be properly connected to protective earth before operating the
system.
A DC-powered IGX node must have grounding conductors that connect at two separate locations, as
follows:
• The grounding conductor provided with the supply source must connect to the correct terminal of
the power entry module (PEM). The “DC Power Connections” section on page 2-41 describes how
to make this connection.
• A grounding conductor as described in the first paragraph of this section must connect to the
appropriate terminal of a rack assembly or to the chassis of an IGX node.