Connect the QFX5110 to Earth Ground
You must install the QFX5110 in a restricted-access location and ensure that the chassis is always properly grounded. The QFX5110 has a two-hole protective grounding terminal provided on the chassis. See Figure 1. We recommend that you use this protective grounding terminal as the preferred method for grounding the chassis regardless of the power supply configuration. However, if additional grounding methods are available, you can also use those methods. For example, you can use the grounding wire in the power cord or use the grounding terminal or lug on a DC power supply. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.
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 (for example, by causing a short circuit).
Mount your switch in the rack or cabinet before attaching the grounding lug to the switch. See Unpacking and Mounting the QFX5110.
Ensure that you have the following parts and tools available:
Grounding cable for your QFX5110 device—The grounding cable must be 14 AWG (2 mm²), minimum 90° C wire, or as permitted by the local code (not provided).
Grounding lug for your grounding cable—The grounding lug required is a Panduit LCD10-10A-L or equivalent (not provided).
Two 10-32 x 0.25 screws with #10 split-lock washers—Two screws and washers are used to secure the grounding lug to the side of the chassis (not provided).
Number 2 screwdriver.
An AC-powered QFX5110 switch chassis gains additional grounding when you plug the power supply in the switch into a grounded AC power outlet by using an AC power cord appropriate for your geographical location. See QFX5110 AC Power Cord Specifications.
To connect earth ground to a QFX5110:
- 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 that is attached to the grounding cable over the protective earthing terminal.
- Secure the grounding lug to the protective earthing terminal
with two screws and washers. See Figure 1
Figure 1: Connecting a Grounding Cable to a QFX5110 
- Dress the grounding cable and ensure that it does not touch or block access to other device components and that it does not drape where people could trip over it.
