Juniper MX480, Hardware Manual

Page: 143 / 420

NOTE: Install the router only in restricted areas, such as dedicated equipment
rooms and equipment closets, in accordance with Articles 110-16, 110-17, and
110-18 of the National Electrical Code, ANSI/NFPA 70.
See Also Tools and Parts Required to Maintain the MX480 Router
•
•
In Case of an Electrical Accident
MX480 Chassis Grounding Specifications
•
MX480 Chassis Grounding Points Specifications on page 143
• MX480 Router Grounding Cable Lug Specifications on page 144
• MX480 Router Grounding Cable Specifications on page 145
MX480 Chassis Grounding Points Specifications
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, the router must be adequately grounded before power is connected.
To ground AC-powered and DC-powered routers, you must connect a grounding cable
to earth ground and then attach it to the chassis grounding points using the two screws
provided.
Two threaded inserts (PEM nuts) are provided on the upper rear of the chassis for
connecting the router to earth ground. The grounding points fit UNC 1/4–20 screws
(American). The grounding points are spaced at 0.625-in. (15.86-mm) centers (see
Figure 39 on page 144 or Figure 40 on page 144 ).
NOTE: Additional grounding is provided to an AC-powered router when you
plug its power supplies into grounded AC power receptacles.
143 Copyright © 2019, Juniper Networks, Inc.
Chapter 2: Site Planning, Preparation, and Specifications