T640 DC Power Cable and Lug Specifications
The accessory box shipped with the T640 router includes eighteen 4-AWG (21.2 mm
2
)
cable lugs for the DC cables that attach to the terminal studs of each power supply (see
Figure 56 on page 132). the number of DC cables and cable lugs required varies depending
on the power supply (see Table 73 on page 132). Each DC power cable requires one cable
lug. One cable lug shown is also used for the grounding the chassis.
CAUTION: Before routerinstallation begins, a licensed electricianmust attach
a cable lug to the power cables that you supply. A cable with an incorrectly
attached lug can damage the router.
Figure 56: T640 DC Power Cable Lug
Crimp area
4 AWG
conductor
All measurements in inches
0.28
2 holes
2.25
0.25 0.370.63
g001544
0.55
End view
0.08
Table 73: Number of Cables Required
Number of DC Cables per Power SupplyPower Supply
42-input 160-A DC power supply
63-input 240-A DC power supply
84-input 240-A DC power supply
Table 74: T640 Power Cable Specifications
Connector SpecificationQuantity and Specification
Cable lug; dual hole, sized to fit 1/4-20 UNC terminal
studs at 15.86-mm (0.625-in.) center line.
Eight 4-AWG (21.2 mm
2
) (minimum)
copper conductor, or as required by the
local code.
WARNING: For field-wiring connections, use copper conductors only.
For other electrical safety information, see “T640 General Electrical Safety
Guidelines and Electrical Codes” on page 529.
Copyright © 2017, Juniper Networks, Inc.132
T640 Core Router Hardware Guide
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