Juniper QFX5100, Hardware Manual

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Connecting Earth Ground to a QFX5100 Switch
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, you must connect the QFX5100 switch 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 on the QFX5100 switch left front mounting
bracket to connect to the earth ground (see
Figure 38 on page 173 ).
Before you connect earth ground to the protective earthing terminal of a QFX5100 switch,
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 QFX5100 Switch in a Rack or Cabinet” on
page 163 .
Ensure that you have the following parts and tools available:
•
Protective earthing terminal bracket—This bracket attaches to the QFX5100 switch
chassis through the left front mounting bracket, providing a protective earthing terminal
for the switch.
•
Grounding cable for your QFX5100 switch—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 M4 hex nuts with integrated washers—Two nuts and washers are used to secure
the grounding lug to the grounding lug bracket protective earthing terminal. Four nuts
are provided in the accessory kit.
• 7-mm wrench or socket with driver to attach the two nuts.
An AC-powered QFX5100 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” on page 98 .
To connect earth ground to a QFX5100 switch:
Copyright © 2014, Juniper Networks, Inc. 172
QFX5100 Switch Hardware Guide