Juniper EX4300 Series

• Ensure that you have connected the device chassis to earth ground.
CAUTION: Before you connect power to the switch, a licensed electrician must aach
a cable lug to the grounding cable that you supply. A cable with an incorrectly aached
lug can damage the switch (for example, by causing a short circuit).
To meet safety and electromagnec interference (EMI) requirements and to ensure
proper operaon, you must connect the EX4300 switch to earth ground before you
connect it to power. For installaons that require a separate grounding conductor to
the chassis, use the protecve earthing terminal on the switch chassis to connect to
the earth ground. For instrucons on connecng earth ground, see Connect Earth
Ground to an EX Series Switch . An EX4300 switch gains addional 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 locaon (see "AC Power Cord
Specicaons for an EX4300 Switch" on page 105).
• Install the power supply in the chassis. For instrucons on installing a power supply in an EX4300
switch, see "Installing an AC Power Supply in an EX4300 Switch" on page 298.
EX4300 switches support 350 W, 715 W, or 1100 W AC power supplies depending on the switch
model. Aer you install at least one power supply, you can connect power to the switch.
CAUTION: Do not mix:
• AC and DC power supplies in the same chassis
• Power supplies with dierent airow labels (AIR IN (AFI) and AIR OUT (AFO)) in the
same chassis.
• Fan modules with dierent airow labels (AIR IN (AFI) and AIR OUT (AFO)) in the
same chassis.
• Power supplies and fan modules with dierent airow labels (AIR IN (AFI) and AIR
OUT (AFO)) in the same chassis.
Ensure that you have the following parts and tools available:
• A power cord appropriate for your geographical locaon (provided)
NOTE: Each power supply must be connected to a dedicated power source outlet.
To connect AC power to an EX4300 switch:
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