Grounding Cable And Lug Specifications For Ex4500 Switches - Juniper EX4500 Hardware Manual

Grounding Cable and Lug Specifications for EX4500 Switches

For installations that require a separate grounding conductor to the chassis, the switch must be adequately
grounded before power is connected to ensure proper operation and to meet safety and electromagnetic
interference (EMI) requirements. To ground an EX4500 switch, connect a grounding cable to earth ground
and then attach it to the chassis grounding points.
CAUTION:
use the protective earthing terminal on the switch chassis to connect to earth ground.
Before switch installation begins, a licensed electrician must attach a cable lug to the
grounding cables that you supply. See
on page
A pair of threaded inserts (PEM nuts) is provided on the left side towards the rear corner of the chassis
for connecting the switch to earth ground. The grounding points fit UNC 10-32 screws. The grounding
points are spaced at 0.625 in. (15.86 mm).
The grounding cable that you provide for an EX4500 switch must be 14 AWG (2 mm
wire, or as permitted by the local code.
NOTE: Grounding is provided to an AC-powered switch when you plug its power supplies into
grounded AC power receptacles.
WARNING:
location. It has a separate protective earthing terminal provided on the chassis in
addition to the grounding pin of the power supply cord. This separate protective
earthing terminal must be permanently connected to earth ground for installations
that require a separate grounding conductor to the chassis.
For installations that require a separate grounding conductor to the chassis,
121. A cable with an incorrectly attached lug can damage the switch.
The switch is pluggable type A equipment installed in a restricted-access
"Connect Earth Ground to an EX Series Switch"
2
), minimum 90°C
83