3Com 8807 Connecting Pgnd Wire and Power Cord, Connecting Pgnd Wire Common grounding environment

Connecting PGND Wire and Power Cord 57

Step 6: Align the mounting ears with the square holes in the posts of the cabinet, and fasten the screws in the holes to fix the switch in the cabinet.

Connecting PGND

Wire and Power Cord

Connecting PGND Wire

c CAUTION: For the safety of operators and equipment, the switch must be well grounded. The resistance reading between switch chassis and the ground must be less than 1 ohm.

Common grounding environment

Step 1: Remove the screw from the grounding hole in the switch chassis.

Step 2: Wear the connector of the PGND wire accompanied with the switch on the grounding screw.

Step 3: Insert the grounding screw into the grounding hole and screw it down.

Step 4: Connect the other end of the ground wire to the ground bar of the switch.

n Generally, the cabinets installed in equipment rooms are equipped with ground bar. In this case, you can connect the PGND wire of the switch to the ground bar for it.

Other grounding environment

Following are some methods for grounding the switch in different grounding environments that you are likely to encounter when installing the switch at different places.

n Rather than specifying the switch model or showing the actual location of the switch power input or grounding screw, the following figures are primarily intended for illustrating the switch grounding, either via grounding screw or power input, in specific grounding environments.

■If a ground bar is available, attach one end of the yellow-green PGND wire of the switch to a grounding bolt of the ground bar and fasten the captive nuts. Note that the fire main and lightning rod of a building are not suitable for grounding the switch. The PGND wire of the switch should be connected to the grounding device in the equipment room. (For the Switch 8800 Family, the grounding screw is on the rear panel. Connect it as illustrated in Figure 37).