Juniper QFX10016 Hardware Manual page 223

Copyright © 2017, Juniper Networks, Inc.
CAUTION: Do not mix AC and DC power supplies in the same chassis.
CAUTION: To meet safety and electromagnetic interference (EMI)
requirements and to ensure proper operation, you must connect QFX10008
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 a QFX10000 switch to ground using a separate
grounding conductor, see
page 162.
NOTE: The battery returns of the DC power supply must be connected as an
isolated DC return (DC-I).
Ensure you understand how to prevent ESD damage. See
Discharge Damage" on page
Ensure that you have the following parts and tools available to install a DC power
supply:
Electrostatic discharge (ESD) grounding strap
DC power source cables (not provided) with the cable lugs (provided) attached
The provided terminal lugs in a QFX10000 are sized for 4 AWG (21.1 mm
source cables. The DC power source cables that you provide must be 4 AWG
2
(21.1 mm ), minimum 60° C wire. We recommend that you install heat-shrink tubing
insulation around the crimped section of the power cables and lugs.
13/32 in. (10 mm) nut driver or socket wrench
Phillips (+) screwdrivers, numbers 1 and 2
Multimeter
To install a DC power supply in a QFX10000 (see
Chapter 17: Replacing Power Supplies
"Connecting Earth Ground to a QFX10000" on
327.
Figure 106 on page
"Prevention of Electrostatic
2
) power
206):
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