Connecting the Power Cables
Installing the Hardware
4-15
Figure 4-13
Connecting Power
The following sections describe the tasks to connect the chassis ground and power cables:
• Connect the Chassis Ground Cables
Connect the Chassis Ground Cables
The back panel of the SmartEdge 1200 chassis has two connectors for chassis ground cables for redundant
connections. Each connector consists of a pair of 1/4-20 threaded holes on .625-inch (1.59 cm) centers,
which are labeled “FRAME GND”. These are located at the rear of the chassis; see Figure 4-13.
Each chassis ground cable must be AWG #4, but AWG #6 might be acceptable, and installed in accordance
with the NEC (in the United States) or applicable local jurisdiction (outside the United States) installation
requirements.
Perform the following steps to connect the chassis ground cables:
1. Attach a compression lug to one end of a chassis ground cable:
a. Insert one end of the chassis ground cable into the lug.
b. Slip the tool over the compression lug and squeeze the handles several times to grip the connector.
c. Continue to squeeze the handles until the automatic tool release indicates a completed compression.
2. For each opening in a compression lug, insert a lock washer over a hex-head bolt followed by a washer;
then insert the compression lug and hex-head bolts and washers into the pair of threaded holes labeled
“FRAME GND” on one side of the chassis.
3. Using a 7/16-inch torque wrench, tighten each hex-head bolt using 25.0 inch-lbs torque
(2.8 Newton-meters) maximum.
4. Ensure that the other end of the cable is connected to an appropriate ground point.
5. Repeat step 1 to step 4 for a redundant frame ground connection.
