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CAUTION: Before you connect power to the switch, a licensed electrician must attach
acablelugtothegroundingandpowercablesthatyousupply.Acablewithanincorrectly
attached lug can damage the switch (for example, by causing a short circuit).
CAUTION: Mixingdifferenttypesofpowersuppliesinthesamechassisisnotasupported
configuration.
NOTE: A 2000 W DC power supply requires a dedicated 60 A circuit breaker for each
input DC feed.
A 3000 W DC power supply requires a dedicated 100 A circuit breaker for each input
DC feed.
NOTE: Each power supply input feed must be connected to a dedicated DC power
source outlet.
Before you begin connecting DC power to an EX8200 switch:
•
Ensure that you have taken the necessary precautions to prevent ESD damage (see
“Prevention of Electrostatic Discharge Damage on EX Series Switches” on page 292).
•
Ensure that you have connected the switch chassis to earth ground.
CAUTION: To meet safety and electromagnetic interference (EMI) requirements and
toensureproperoperation,youmustconnectEX8200switchestoearthgroundbefore
youconnectthemtopower.Forinstallationsthatrequireaseparategroundingconductor
tothe chassis,use the protectiveearthing terminal on the switch chassisto connectto
earth ground. For instructions on connectingan EX8200 switch to ground using a
separate grounding conductor, see “Connecting Earth Ground to an EX Series Switch”
on page 167.
•
Installthepowersupplyinthechassis.See“InstallingaDCPowerSupplyinanEX8200
Switch” on page 152.
Ensure that you have the following parts and tools available to connect DC power to an
EX8200 switch:
•
Electrostatic discharge (ESD) grounding strap
•
DC power source cables (not provided) with the cable lugs (provided) attached.
The provided cable lugs in an EX8208 switch are sized for 6 AWG (13.3 mm
2
) power
source cables. The DC power source cables that you provide must be 6 AWG (13.3
mm
2
),minimum60°Cwire.Werecommendthatyouinstallheat-shrinktubinginsulation
around the power cables and lugs.
Copyright ©2010,Juniper Networks,Inc.176
CompleteHardwareGuide forEX8208 EthernetSwitches