Juniper QFX5220, Hardware Manual

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Ground the QFX5220-32CD and Connect Power
To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you
must connect the QFX5220 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 QFX5220 left front mounting bracket to connect to the earth ground.
See Figure 49 on page 133 .
NOTE: A ground connection to the protective earthing terminal is not required by 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 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 device.
NOTE: Mount your switch in the rack or cabinet before attaching the grounding lug to the switch.
See “Mounting a QFX5220 in a Rack or Cabinet” on page 116 .
Ensure that you have the following parts and tools available:
•
Grounding cable for your QFX5220 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. The grounding lug attaches to the device chassis through the left-front mounting bracket,
providing a protective earthing terminal for the device.
•
Two SAE 10-32 x 0.25 in. screws with number10 split-lock washers—Two screws are used to secure
the grounding lug to the protective earthing terminal. These screws and washers are not provided.
•
Number 2 screwdriver.
An AC-powered QFX5220 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 with Type C15 Coupler Specifications” on page 68 .
To connect earth ground to a QFX5220-32CD:
132