•
Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage
(see “Prevention of Electrostatic Discharge Damage” on page 191).
•
Ensure that you have connected the switch chassis to earth ground.
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. 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.
To connect AC power to a QFX5120:
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. If only one
power supply is installed, ensure that a blank cover panel is installed over the second power supply
slot.
3. Locate the power cord or cords shipped with the switch; the cords have plugs appropriate for your
geographical location.
WARNING: Ensure that the power cord does not block access to device components
or drape where people can trip on it.
4. Connect each power supply to the power sources. Insert the coupler end of the power cord into the
AC power cord inlet on the AC power supply faceplate.
5. Push the power cord retainer onto the power cord (see Figure 48 on page 101 and Figure 49 on page 101).
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