Juniper PTX5000, Руководство по оборудованию

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• 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 (see "PTX5000 AC and DC
PDU Electrical and External Circuit Breaker Specifications" on page 166 for details) 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.
Each –48-VDC facility DC source input power cable connected to a 60-A DC PDU must be equipped
with a current-limiting fuse or circuit breaker (see,
"PTX5000 AC and DC PDU Electrical and External
Circuit Breaker Specifications" on page 166 or as required by local code). The voltage rating of the
facility DC source circuit breaker must be 80 V minimum. We recommend an 80 A–rated circuit
breaker or current-limiting fuse for each 60-A DC power cable.
• 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 (see
"PTX5000 AC and DC PDU Electrical and External Circuit Breaker
Specifications" on page 166 for details) for the 60-A DC PDU.
• Run two wires from the circuit breaker box to a source of 48 VDC. Use appropriate gauge wire (see
"PTX5000 AC and DC PDU Electrical and External Circuit Breaker Specifications" on page 166 for
details).
RELATED DOCUMENTATION
PTX5000 DC Power System Electrical Specifications | 109
General Electrical Safety Guidelines and Warnings | 689
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.
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