Juniper Networks EX8208 User Manual

Page 202

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).

CAUTION: Mixing different types of power supplies in the same chassis is 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
you connect them 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
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

) power

source cables. The DC power source cables that you provide must be 6 AWG (13.3
mm

), minimum 60°C wire. We recommend that you install heat-shrink tubing insulation

around the power cables and lugs.

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Complete Hardware Guide for EX8208 Ethernet Switches