Switch User Manual

CAUTION: Before you connect power to the switch, a licensed electrician must attach
a cablelugtothe grounding and powercables that you supply. A cable with an incorrectly
attached lug can damage the switch (for example, by causing a short circuit).
CAUTION: Mixing different typesof powersupplies in the same chassisis not a supported
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
to ensure proper operation, you must connect EX8200 switches to earth ground before
youconnect them to power. For installations that requirea separate grounding conductor
to the chassis, use the protective earthing terminal on the switch chassis to connect to
earth ground. For instructions on connecting an EX8200 switch to ground using a
separate grounding conductor, see “Connecting Earth Ground to an EX Series Switch”
on page 167.
•
Install the power supply in the chassis. See “Installing a DC Power Supply in an EX8200
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
), minimum 60°C wire. We recommendthat you install heat-shrink tubing insulation
around the power cables and lugs.
Copyright © 2010, Juniper Networks, Inc.176
Complete Hardware Guide for EX8208 Ethernet Switches