38 CHAPTER 2: INSTALLING THE SWITCH 7750
Connecting the Ground Wire
To connect the ground wire:
1Wear an antistatic wrist strap.
2Remove the screw from the grounding hole in the switch chassis.
3Set the ground wire connector around the grounding screw.
4Fasten the grounding screw in the hole on the chassis.
5Connect the other end of the ground wire to the grounding bar of the switch.
If you install the switch in a cabinet, 3Com recommends that the ground wire of
the switch be connected to the grounding bar of the cabinet.
WARNING: The resistance between switch chassis and the ground should be less
than 1 ohm.
Connecting and Configuring Power
The Switch 7750 requires power connection from the AC power source and from
the PoE power rack.
Connecting AC Power
Cords
To connect AC power cords:
1Power off all the related parts of the switch before connecting the AC power cord
2Plug the power cords into the sockets in the switch and attach the retention clips
to the power cord plugs.
3Plug the other end of the cords into a socket strip with surge protector. Connect
the strip to the power source in the room.
Figure 28 illustrates the power cord connection.
Figure 28 Power Cord Connection
1 AC power sockets
2 Retention clips
3 Grounding screw
WARNING: For surge protection, the power should be channelled through an
external protection device into the Switch 7750.