Juniper QFX5110, Hardware Manual

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Connecting Earth Ground to a QFX5110
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, you must connect the QFX5110 to earth ground before you connect it
to power.
For installations that require a separate grounding conductor to the chassis, you must
attach a protective earthing terminal bracket. You can attach the earthing terminal on
the FRU end of the chassis or through the left-front mounting bracket (see
Figure 27 on page 85 ).
Before you connect earth ground to the protective earthing terminal of a QFX5110, ensure
that a licensed electrician has attached an appropriate grounding lug to the grounding
cable.
CAUTION: Using a grounding cable with an incorrectly attached lug can
damage the switch.
NOTE: Mount your switch in the rack or cabinet before attaching the grounding
lug to the switch. See “Mounting a QFX5110 in a Rack” on page 77 .
Ensure that you have the following parts and tools available:
•
Protective earthing terminal bracket—This bracket attaches to the QFX5110 switch
chassis through the left-front mounting bracket, providing a protective earthing terminal
for the switch.
•
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.
• Grounding lug for your grounding cable—The grounding lug required is a Panduit
LCD10-10A-L or equivalent.
•
Two 10-32 x 0.25 screws with #10 split-lock washers—Two screws are used to secure
the grounding lug to the grounding lug bracket protective earthing terminal. These
screws and washers are 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
AC Power Cord Specifications for a QFX
Series Device .
To connect earth ground to a QFX5110:
Copyright © 2017, Juniper Networks, Inc. 84
QFX5110 Switch Hardware Guide