Dc Power Electrical Safety Warnings For Juniper Networks Devices; Dc Power Copper Conductors Warning - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide

DC Power Electrical Safety Warnings for Juniper Networks Devices

586
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.
Ensure that the polarity of the DC input wiring is correct. Under certain conditions,
connections with reversed polarity might trip the primary circuit breaker or damage
the equipment.
For personal safety, connect the green and yellow wire to safety (earth) ground at both
the router and the supply side of the DC wiring.
The marked input voltage of –48 VDC for a DC-powered router is the nominal voltage
associated with the battery circuit, and any higher voltages are only to be associated
with float voltages for the charging function.
Because the router is a positive ground system, you must connect the positive lead to
the terminal labeled
RTN
ground to the chassis grounding points.
When working with DC-powered equipment, observe the following warnings:
DC Power Copper Conductors Warning on page 586
DC Power Disconnection Warning on page 587
DC Power Wiring Terminations Warning on page 588

DC Power Copper Conductors Warning

WARNING: Use copper conductors only.
Waarschuwing Gebruik alleen koperen geleiders.
Varoitus Käytä vain kuparijohtimia.
Attention Utilisez uniquement des conducteurs en cuivre.
Warnung Verwenden Sie ausschließlich Kupferleiter.
Avvertenza Usate unicamente dei conduttori di rame.
Advarsel Bruk bare kobberledninger.
Aviso Utilize apenas fios condutores de cobre.
¡Atención! Emplee sólo conductores de cobre.
Varning! Använd endast ledare av koppar.
, the negative lead to the terminal labeled , and the earth
–48V
Copyright © 2015, Juniper Networks, Inc.