Juniper PTX5000, Hardware Manual

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PTX5000 Chassis Grounding Cable and Lug Specifications
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the
PTX5000 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 kit shipped with the PTX5000 includes:
• Two UNC 1/4–20 screws used to secure the grounding cable to the bottom grounding points.
• Depending on your configuration:
• 60-A DC PDU—4-AWG (21.2 mm
2
) cable lugs for connecting DC power and grounding the
PTX5000 (see Figure 76 on page 165 ).
• 120-A DC PDU—0-AWG (53 mm
2
) cable lugs for connecting DC power and grounding the
PTX5000 (see Figure 75 on page 165 ).
• High Capacity DC PDU—4-AWG (21.2 mm
2
) cable lugs for connecting DC power and grounding
the PTX5000 (see Figure 76 on page 165 ).
CAUTION: Before device 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 PTX5000.
NOTE: You must install the PTX5000 in a restricted-access location and ensure that the chassis
is always properly grounded. The PTX5000 has a two-hole protective grounding terminal
provided on the chassis. Under all circumstances, use this grounding connection to ground the
chassis. For AC-powered systems, you must also use the grounding wire in the AC power cord
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