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 earthground,see “Connectingthe QFX5110 to GroundingCable”
on page92. Theswitch gainsadditional grounding when youplug the power
supply in the switch intoa groundedAC poweroutletbyusing the ACpower
cord appropriate for your geographical location (see “QFX5110 AC Power
Supply Description” on page 45).
•
Install the power supply in the chassis. For instructions on installing a power supply in
a QFX5110, see “Installing a Power Supply in a QFX5110” on page 111.
NOTE: Each power supply must be connected to a dedicated power source
outlet.
To connect AC power to a QFX5110:
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 onlyone 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. See “QFX5110 AC Power Specifications”
on page 47.
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 28 on page 97).
Copyright © 2019, Juniper Networks, Inc.96
QFX5110 Switch Hardware Guide
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