T640 Dc Power Cable Specifications; Figure 180: T640 Dc Power And Grounding Cable Lug; Table 41: T640 Power Cable Specifications - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

T640 DC Power Cable Specifications

352
General Electrical Safety Guidelines and Electrical Codes for M Series, MX Series, and
T Series Routers on page 324
The accessory box shipped with the T640 router includes the cable lugs that attach to
the terminal studs of each power supply (see Figure 180 on page 352). (The cable lug
shown in Figure 180 on page 352 is also used for the grounding the chassis.)

Figure 180: T640 DC Power and Grounding Cable Lug

CAUTION: Before router installation begins, a licensed electrician must attach
a cable lug to the power cables that you supply. A cable with an incorrectly
attached lug can damage the router.

Table 41: T640 Power Cable Specifications

Cable Type Quantity and Specification
Power Eight 4-AWG (21.2 mm
copper conductor, or as required by the
local code.
WARNING: For field-wiring connections, use copper conductors only.
For other electrical safety information, see "General Electrical Safety
Guidelines and Electrical Codes for M Series, MX Series, and T Series Routers"
on page 324.
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled
their polarity. There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your site determines
the color coding for the leads on the power cables that attach to the terminal
studs on each power supply.
Connector Specification
2
) (minimum) Cable lug; dual hole, sized to fit
1/4-20 UNC terminal studs at
15.86-mm (0.625-in.) center line.
(+)
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