Juniper QFX10016, Hardware Manual

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WARNING: Before performing DC power procedures, ensure that power is removed
from the DC circuit. To ensure that all power is off, locate the circuit breaker on the
panel board that services the DC circuit, switch the circuit breaker to the OFF position,
and tape the switch handle of the circuit breaker in the OFF position.
WARNING: Protect yourself from severe burns by wearing heat-protective gloves when
removing a working HVDC power supply from the chassis. HVDC power supplies can
reach in the range of 158°F (70°C) to 176°F (80°C).
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: Do not mix AC, DC, or HVDC power supplies in the same running chassis.
You can mix DC and HVDC power supplies while swapping out one type for another
during installation.
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
Connect the QFX10008 or QFX10016 to
Earth Ground
.
NOTE: The battery returns of the JNP10K-PWR-DC2 power supply must be connected as an
isolated DC return (DC-I).
• Ensure you understand how to prevent ESD damage. See
Prevention of Electrostatic Discharge
Damage
.
• Ensure that you have the following parts and tools available to install a DC power supply:
• Electrostatic discharge (ESD) grounding strap
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