Dc Power Electrical Safety Guidelines And Warnings; Tx Matrix Dc Power Electrical Safety Guidelines; Dc Power Electrical Safety Warnings For M Series, Mx Series, And T Series - Juniper TX MATRIX Hardware Manual

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DC Power Electrical Safety Guidelines and Warnings

TX Matrix DC Power Electrical Safety Guidelines

Copyright © 2010, Juniper Networks, Inc.
Appendix A: Safety and Regulatory Compliance Information for the TX Matrix Router
¡Atención! Antes de manipular el chasis de un equipo o trabajar cerca de una
fuente de alimentación, desenchufar el cable de alimentación en los equipos
de corriente alterna (CA); cortar la alimentación desde el interruptor
automático en los equipos de corriente continua (CC).
Varning! Innan du arbetar med ett chassi eller nära strömförsörjningsenheter
skall du för växelströmsenheter dra ur nätsladden och för likströmsenheter
bryta strömmen vid överspänningsskyddet.
DC Power Electrical Safety Warnings for M Series, MX Series, and T Series Routers on
page 324
TX Matrix DC Power Electrical Safety Guidelines on page 323

DC Power Electrical Safety Warnings for M Series, MX Series, and T Series

Routers on page 324
The following electrical safety guidelines apply to a DC-powered TX Matrix router:
A DC-powered TX Matrix router is equipped with a DC terminal block that is rated for
the power requirements of a maximally configured TX Matrix router. To supply sufficient
power, terminate the DC input wiring on a facility DC source capable of supplying at
least 76 A @ –48 VDC. We recommend that the 48 VDC facility DC source be equipped
with a circuit breaker rated at 125% of the power provisioned for the input minimum,
or as required by local code. Incorporate an easily accessible disconnect device into
the facility wiring. 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. 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.
Run two wires from the circuit breaker box to a source of 48 VDC. Use appropriate
gauge wire to handle up to 100 A.
A DC-powered TX Matrix 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.
323