Juniper QFX3500, Hardware Documentation

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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 62 on page 268 . 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.
CAUTION: 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).
NOTE: 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:
1. Connect one end of the grounding cable to a proper earth ground, such as the rack in which the switch
is mounted.
2. Place the grounding lug that is attached to the grounding cable over the protective earthing terminal.
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