General Site Guidelines; Ptx5000 Chassis Grounding Cable And Lug Specifications - Juniper PTX5000 Hardware Manual

PTX5000 Packet Transport Router Hardware Guide
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General Site Guidelines

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PTX5000 Chassis Grounding Cable and Lug Specifications

112
Routine Maintenance Procedures for the PTX5000 Packet Transport Router on page 479
Efficient device operation requires proper site planning and maintenance and proper
layout of the equipment, rack or cabinet (if used), and wiring closet.
To plan and create an acceptable operating environment for your device and prevent
environmentally caused equipment failures:
Keep the area around the chassis free from dust and conductive material, such as
metal flakes.
Follow prescribed airflow guidelines to ensure that the cooling system functions properly
and that exhaust from other equipment does not blow into the intake vents of the
device.
Follow the prescribed electrostatic discharge (ESD) prevention procedures to prevent
damaging the equipment. Static discharge can cause components to fail completely
or intermittently over time.
Install the device in a secure area, so that only authorized personnel can access the
device.
Prevention of Electrostatic Discharge Damage on page 611
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
the PTX5000 (see Figure 63 on page
120-A DC PDU—0-AWG (53 mm
the PTX5000 (see Figure 62 on page
High Capacity DC PDU—4-AWG (21.2 mm
grounding the PTX5000 (see
2
) cable lugs for connecting DC power and grounding
113).
2
) cable lugs for connecting DC power and grounding
113).
2
) cable lugs for connecting DC power and
Figure 63 on page 113).
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