Juniper EX4500 Hardware Manual page 132

Ensure that you have connected the switch chassis to earth ground.
CAUTION:
and to ensure proper operation, you must connect EX4500 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 EX4500 switch to
ground using a separate grounding conductor, see
Series Switch" on page
Install the power supply in the chassis. See
page 204.
Ensure that you have the following parts and tools available to connect DC power to the switch:
Electrostatic discharge (ESD) grounding strap
DC power source cables (not provided) with the cable lugs (Molex 190410014 or equivalent) (not
provided) attached
Phillips (+) screwdriver, number 2
Multimeter
To connect DC power to the switch:
1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
the ESD point on the chassis.
2. Remove the plastic cover from the DC power input terminal block by sliding it off either to the left or
right. Save this cover for future use. See
NOTE: It might be necessary to slide each power supply partially out of the chassis to easily
connect the DC power source cables to the DC power input terminals. See
Power Supply from an EX4500 Switch" on page
To meet safety and electromagnetic interference (EMI) requirements
121.
"Installing a DC Power Supply in an EX4500 Switch" on
Figure 39 on page
"Connect Earth Ground to an EX
133.
202.
"Removing a DC
132