Acx500 Dc Power Electrical Safety Guidelines - Juniper ACX500 Hardware Manual

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ACX500 DC Power Electrical Safety Guidelines

Copyright © 2016, Juniper Networks, Inc.
The power cord serves as the main disconnecting device for the AC-powered device.
The socket outlet must be near the AC-powered device and be easily accessible.
The cores in the main lead are colored in accordance with the following code:
Green or yellow—Earth (label: G)
White or blue—Neutral (label: N)
Brown or black—Live (label: L)
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.
WARNING: The attached power cable is only for this product. Do not use the
cable for another product. Japanese translation:
ACX500 Power Overview on page 49
ACX500 DC Power Electrical Safety Guidelines on page 225
ACX500 AC Power Electrical Safety Guidelines and Warnings on page 224
ACX500 DC Power Specifications on page 84
ACX500 AC Power Specifications on page 81
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 5 A @ –48 VDC
per input for each power supply. We recommend that the 48 VDC facility DC source
should be equipped with a circuit breaker rated at 5 A @ –48 VDC) 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 percent 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 5 A
Chapter 28: Electrical Safety Guidelines and Warnings
225