Juniper M7i Hardware Guide

•
Green and yellow—Earth
•
Blue—Neutral
•
Brown—Live
•
When a router is equipped with two AC power supplies, both power cords (one for
each power supply) must be unplugged to completely disconnect power to the router.
•
Note the following warnings printed on the AC power supply faceplate:
•
To completely de-energize the system disconnect maximum of 2 power cordsets.
•
Apparaten skall anslutas till jordat uttag när den ansluts till ett nätverk. [Swedish]
Related
Documentation
Preventing Electrostatic Discharge Damage to an M7i Router on page 228•
• General Electrical Safety Guidelines and Electrical Codes for M Series, MX Series, and
T Series Routers on page 254
• M7i DC Power Electrical Safety Guidelines on page 255
M7i DC Power Electrical Safety Guidelines
The following electrical safety guidelines apply to a DC-powered router:
•
A DC-powered router is equipped with a DC terminal block that is rated for the power
requirements of a maximally configured router. To supply sufficient power, terminate
the DC input wiring on a facility DC source capable of supplying at least 31 A @ –48 VDC
per input for each power supply.
•
Incorporate an easily accessible disconnect device into the facility wiring. We
recommend that the 48 VDC facility DC source should be equipped with a circuit
breaker rated at 40 A (–48 VDC) minimum, or as required by local code. In the United
States and Canada, the 48 VDC facility should be equipped with a circuit breaker rated
a minimum of 125% of the power provisioned for the input in accordance with the
National Electrical Code in the US and the Canadian Electrical Code in Canada.
•
Run two wires from the circuit breaker box to a source of 48 VDC. Use appropriate
gauge wire to handle up to 50 A.
•
Be sure to connect the ground wire or conduit to a solid office (earth) ground. A closed
loop ring is recommended for terminating the ground conductor at the ground stud.
•
A DC-powered router that is equipped with a DC terminal block is intended only for
installation in a restricted access location. In the United States, a restricted access
area is one in accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical
Code ANSI/NFPA 70.
NOTE: Primary overcurrent protection is provided by the building circuit
breaker. This breaker should protect against excess currents, short circuits,
and earth faults in accordance with NEC ANSI/NFPA70.
255Copyright © 2019, Juniper Networks, Inc.
Chapter 38: Electrical Safety Guidelines and Warnings

Juniper M7i Specifications

General

Brand	Juniper
Model	M7i
Category	Network Router
Language	English