Juniper Networks T1600 Benutzerhandbuch

NOTE: If you plan to operate a maximally configured T1600 routing node, we
recommend that you provision at least 64 A @ –48 VDC for each power supply input
in the system. Although 

Input 0

 requires less power, we recommend provisioning

the same amount of power for each input to avoid the possibility of connecting the
lower-powered DC cable to 

Input 1

 or 

Input 2

.

Use a facility circuit breaker rated for 80 A (–48 VDC) minimum for each power
supply input. Doing so enables you to operate the T1600 routing node in any
configuration without upgrading the power infrastructure. You must provision a
circuit breaker for each DC power supply input rated for at least 125% of the
continuous current that the system draws at –48 VDC.

Table 8 on page 46 summarizes the specifications for the DC power cables, which
you supply. For two of the inputs on each power supply, use the DC power cables
and lugs that were connected to the two-input 160-A power supply. Four additional
DC power cables are required. The accessory box shipped with the T1600 upgrade
kit includes four cable lugs that attach to the terminal studs of the additional third
input on each three-input 240-A power supply (see Figure 25 on page 46).

Figure 25: DC Power Cable Lug

Table 8: DC Power Cable Specifications

Quantity and Specification

Cable Type

Four 4-AWG (21.2 mm2), minimum 90°C wire, or as permitted by the local
code

Power

46

■

T1600 Routing Node DC Power Specifications

T1600 Routing Node Upgrade Guide