APPENDIX D
Power Guidelines, Requirements, and
Specifications
•
PTX5000 Chassis Grounding Cable and Lug Specifications on page 259
•
PTX5000 DC Power System Electrical Specifications on page 260
•
PTX5000 DC Power Distribution Unit Specifications on page 261
•
PTX5000 DC Power Requirements on page 262
•
PTX5000 DC Power Cable and Lugs Specifications on page 263
•
PTX5000 DC Power Distribution on page 264
PTX5000 Chassis Grounding Cable and Lug Specifications
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, the packet transport switch must be adequately grounded before
power is connected.
Two pairs of threaded inserts (PEM nuts) are provided on the right rear of the chassis for
connecting the packet transport to earth ground. The top pair of grounding points fits
M6 screws (European), and the bottom pair fits UNC 1/4–20 screws (American). The
grounding points are spaced at 0.625-in. (15.86-mm) centers.
The accessory box shipped with the packet transport switch includes:
•
Two UNC 1/4–20 screws used to secure the grounding cable to the bottom grounding
points.
•
One 0-AWG (53 mm
2
) cable lug used to secure the grounding cable to the grounding
points.
NOTE: The cable lug shown in Figure 87 on page 260 can also used for the
DC power cables.
CAUTION: Before packet transport switch installation begins, a licensed
electrician must attach a cable lug to the grounding cable that you supply.
259Copyright © 2012, Juniper Networks, Inc.
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