Step 3: Connect the QFX5120 Switch to Earth Ground
To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect the switch to earth ground before you connect power to the switch. You must use the protective earthing terminal on the switch chassis to connect the switch to ground.
A ground connection to the protective earthing terminal is not required for an AC-powered switch. The AC power cords provide adequate grounding when you connect the power supply in the switch to a grounded AC power outlet by using the AC power cord appropriate for your geographical location.
The switch is installed in a restricted-access location.
If an external ground connection is required, ensure that a licensed electrician has attached an appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.
To ground the QFX5120:
- Connect one end of the grounding cable to a proper earth ground, such as the rack in which the switch is mounted.
- Place the grounding lug attached to the grounding cable over the protective earthing terminal (see Figure 10 and Figure 11). The protective earthing terminal is on the rear panel on a QFX5120-32C switch and on the left panel on a QFX5120-48Y switch and a QFX5120-48T switch.
- Secure the grounding lug to the protective earthing terminal with the washers and screws.
- Dress the grounding cable and ensure that it does not
touch or block access to other switch components.
Ensure that the cable does not drape where people could trip over it.