Connecting the Power Cables
Installing the Hardware
4-11
Figure 4-7 Positioning an AC Power Tray
Connecting the Power Cables
You can power the SmartEdge 400 router from either a DC or AC power source. To connect the appropriate
type of power source at the installation site, perform the tasks described in the following sections:
• Connect the Ground Cables and C-Bracket
• Connect the DC Power Sources
• Connect the AC Power Sources
Connect the Ground Cables and C-Bracket
The back panels of the SmartEdge 400 chassis and the AC power tray each have a pair of 10-32 studs,
which are used to attach a ground cable to each unit; if the AC power tray is installed, the studs are also
used to attach a C-bracket that provides additional stability for the AC power tray in the event of an
earthquake. The C-bracket installation is required only if the chassis and AC power tray are installed in a
23-inch rack.
The ground cables must be of a size suitable for the installation, and must be installed in accordance with
the National Electrical Code (in the United States), or the applicable local jurisdiction (outside the United
States) installation requirements.
Perform the following procedure for the chassis and, if installed, the AC power tray. To connect a ground
cable, perform the following steps:
1. Using a crimping tool, attach a two-hole lug to one end of the ground cable.
2. Place the connector over the studs at the rear of the chassis or AC power tray.
3. Secure the connection with a pair of lug nuts; with a 7/16-inch torque wrench, tighten the lug nuts using
15.0 inch-lbs torque (1.7 Newton-meters) maximum.