Juniper QFX5200 Hardware Manual page 122

Before you begin connecting AC power to the switch:
• Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD)
damage (see "Prevention of Electrostatic Discharge Damage" on page
• 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. For instructions on connecting earth ground, see
Earth Ground" on page
power supply in the switch into a grounded AC power outlet by using the AC power
cord appropriate for your geographical location (see
Specifications" on page
• Install the power supply in the chassis. For instructions on installing a power supply in a QFX5200,
see "Installing a Power Supply in a QFX5200" on page
The QFX5200 is shipped from the factory with two power supplies. Each power supply is a hot-
removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and
running. You can install replacement power supplies in the two slots next to the fan modules without
powering off the switch or disrupting the switching function.
NOTE: Each power supply must be connected to a dedicated power source outlet.
To connect AC power to a QFX5200:
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 a that 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.
109. The switch gains additional grounding when you plug the
43).
133.
194).
"Connect the QFX5200 to
"QFX5200 Power Cord
113