Juniper QFX5220, Руководство по оборудованию, Страница: 82 / 247

QFX5220 Grounding Cable and Lug Specifications
For installations that require a separate grounding conductor to the chassis, the switch must be adequately
grounded before power is connected to ensure proper operation and to meet safety and electromagnetic
interference (EMI) requirements. To ground a QFX5220, connect a grounding cable to earth ground and
then attach it to the chassis grounding points.
NOTE: A ground connection 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.
WARNING: The switch is pluggable type A equipment installed in a restricted-access
location. It has a separate protective earthing terminal provided on the chassis in addition
to the grounding pin of the power supply cord. This separate protective earthing terminal
must be permanently connected to earth ground for installations that require a separate
grounding conductor to the chassis.
WARNING: To comply with GR-1089 requirements, all intrabuilding copper cabling used
for SFP+ and QSFP+ ports must be shielded and grounded at both ends.
CAUTION: Before switch installation begins, a licensed electrician must attach a cable
lug to the grounding cables that you supply. See “Ground the QFX5220-32CD and
Connect Power” on page 132 and “Ground the QFX5220-128C” on page 129 . A cable with
an incorrectly attached lug can damage the switch.
Before connecting the switch to earth ground, review the following information:
•
The grounding lug required for the protective earthing terminal on a QFX5220 is a Panduit LCD10-10A-L
or equivalent (not provided). The grounding lug should accommodates 14–10 AWG (2–5.3 mm²) stranded
wire.
•
The grounding cable that you provide for a QFX5220 must be 14 AWG (2 mm²), minimum 60° C wire,
or as permitted by the local code.
•
Ensure you have two SAE 10-32 x 1/4 in. washers and screws to attach the cable and bracket (not
provided).
85