T4000 Dc Power System Electrical Specifications; Figure 147: Grounding Cable Lug; Table 46: Dc Power System Electrical Specifications - Juniper T4000 Hardware Manual

T4000 Router Hardware Guide
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T4000 DC Power System Electrical Specifications

336
CAUTION: Before router installation begins, a licensed electrician must attach
a cable lug to the grounding cable that you supply. A cable with an incorrectly
attached lug can damage the router.
The accessory box shipped with the router includes one 4-AWG (21.2 mm
attaches to the grounding cable and is used to secure the grounding cable to the grounding
points (see Figure 147 on page
used for the DC power cables.)

Figure 147: Grounding Cable Lug

Tools and Parts Required to Ground the T4000 Router on page 109
Connecting the T4000 Grounding Cable on page 110
Table 46 on page 336 lists the DC power system electrical specifications.

Table 46: DC Power System Electrical Specifications

Item
DC input voltage
DC system current rating
For each power supply, we recommend that you provision at least 56 A @ –48 VDC per
input. Doing so enables you to operate the router in any configuration without upgrading
the power infrastructure. Although Input 0 in the DC power supply 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 through Input 5.
Circuit breaker current rating of 100 A per feed maximum shall be incorporated external
to the equipment. The voltage rating of this breaker shall be 80 V minimum. For each
power supply input, use a facility circuit breaker rated for 100 A (–48 VDC) maximum or
336). (The cable lug shown in
Specification
Operating range: –40.0 to –72.0 VDC
205 A @ –48 VDC (nominal) (9840 W)
Input 0: 25 A @ –48 VDC (nominal) (1200 W)
Input 1 through 5: 180 A @ -–48 VDC (nominal)
(8640 W)
Copyright © 2013, Juniper Networks, Inc.
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cable lug that
Figure 147 on page 336 is also