Before you begin connecting AC power to the switch:
•
Ensure that you have a power cord appropriate for your geographical location available.
•
Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention
of Electrostatic Discharge Damage).
•
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 (see Connect the
QFX5120 Switch to Earth Ground). For installations that require a separate grounding conductor to
the chassis, use the protective earthing terminal on the switch chassis to connect to 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 power to an AC-powered QFX5120 switch:
1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap 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 cover 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 12 and Figure 13).
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