Connecting the QFX5110 to Grounding Cable
To ensure proper operation and to meet safety electromagnetic interference (EMI)
requirements, you must connect the QFX5110 to earth ground before you connect power
to the device. You must use the protective earthing terminal on the side of the switch
chassis to connect the device to earth ground.
For installations that require a separate grounding conductor to the chassis, you must
attach a grounding cable with a grounding lug. You can attach the lug and cable through
the left-front mounting bracket (see Figure 22 on page 93).
NOTE: A groundconnection 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.
CAUTION: If an externalground 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.
NOTE: Mount your switch in the rack orcabinetbeforeattachingthe grounding
lug to the switch. See “Unpacking and Mounting the QFX5110” on page 88.
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”
on page 47.
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.
Copyright © 2019, Juniper Networks, Inc.92
QFX5110 Switch Hardware Guide
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