Juniper QFX5220, Руководство по оборудованию, Страница: 134 / 247

CAUTION: Before you connect power to the switch, a licensed electrician must attach
a cable lug to the grounding and power cables that you supply. A cable with an
incorrectly attached lug can damage the switch (for example, by causing a short circuit).
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, you must connect the chassis to earth ground before you connect
it to power. For installations that require a separate grounding conductor to the chassis,
use the protective earthing terminal on the switch chassis to connect to the earth
ground. For instructions on connecting earth ground, see “Ground the QFX5220-128C”
on page 129 , “Connect Power to the QFX5220-128C” on page 129 , or “Ground the
QFX5220-32CD and Connect Power” on page 132 . The switch gains additional grounding
when you plug the power supply in the switch into a grounded AC power outlet by
using the AC power cord appropriate for your geographical location (see “AC Power
Cord with Type C15 Coupler Specifications” on page 68 for QFX5220-128C) or “AC
Power Cord with Type C13 Coupler Specifications” on page 66 for the QFX5220-32CD.
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Install the power supplies in the chassis. For instructions on installing a power supply in a QFX5220, see
“How to Install an AC Power Supply in a QFX5220” on page 160 .
NOTE: Each power supply must be connected to a dedicated power source outlet.
To connect AC power to a QFX5220:
1. Attach the grounding strap to your bare wrist and to a site ESD point.
2. Ensure that the power supplies are fully inserted in the chassis and the latches are secure. .
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