Dc Power Electrical Safety Guidelines - Juniper Junos Space JA2500 Hardware Manual

JA2500 Junos Space Appliance Hardware Guide
Related
Documentation

DC Power Electrical Safety Guidelines

144
Aviso Antes de trabalhar num chassis, ou antes de trabalhar perto de unidades
de fornecimento de energia, desligue o cabo de alimentação nas unidades
de corrente alternada.
¡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).
Varning! Innan du arbetar med ett chassi eller nära strömförsörjningsenheter
skall du för växelströmsenheter dra ur nätsladden.
AC Power Electrical Safety Guidelines on page 142
General Electrical Safety Guidelines and Warnings on page 139
General Safety Guidelines and Warnings on page 113
This topic applies to the following Junos Space Appliances: JA1500 and JA2500.
A DC-powered device is equipped with a DC terminal block that is rated for the power
requirements of a maximally configured device.
NOTE: To supply sufficient power, terminate the DC input wiring on a facility
DC source that is capable of supplying a maximum inrush current of 30 A
at power-up
Incorporate an easily accessible disconnect device into the facility wiring. 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. (The range
supported by the DC power supply is –45 VDC to –60 VDC.)
A DC-powered device 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 must protect against excess currents, short circuits,
and earth grounding faults in accordance with NEC ANSI/NFPA 70.
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.
Copyright © 2014, Juniper Networks, Inc.