Grounding The Mx2020 Router - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
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Grounding the MX2020 Router

116
The terminal block connections on the AC delta and wye PDM use a 1/4-in. slotted
screwdriver for the slotted screws. Use a 5/32-in. (4-mm) Allen wrench for the 5/16-in.
hex screws.
Wire cutters
Electrostatic discharge (ESD) grounding wrist strap
CAUTION: The maximum torque rating of the terminal studs on the DC PDM
is 25 lb-in. (33.89 Nm). The terminal studs may be damaged if excessive
torque is applied. Use only a torque-controlled driver or socket wrench to
tighten nuts on the DC PDM terminal studs. Use an appropriately sized driver
or socket wrench. Ensure that the driver is undamaged and properly calibrated
and that you have been trained in its use. You may wish to use a driver that
is designed to prevent overtorque when the preset torque level is achieved.
Grounding the MX2020 Router on page 116
MX2020 Router Grounding Specifications on page 380
Connecting AC Power to a MX2020 Router with Three-Phase Delta AC Power
Distribution Modules on page 117
Connecting AC Power to a MX2020 Router with Three-Phase Wye AC Power Distribution
Modules on page 122
Connecting Power to a DC-Powered MX2020 Router with Power Distribution Modules
on page 131
You ground the router by connecting a grounding cable to earth ground and then attaching
it to the chassis grounding points using two screws. You must provide the grounding
cables (the cable lugs are supplied with the router). To connect the grounding cable (see
Figure 71 on page 117):
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to an approved site ESD grounding point. See the instructions for your site.
Ensure that all grounding surfaces are clean and brought to a bright finish before you
2.
make grounding connections.
Connect the grounding cable to a proper earth ground.
3.
Verify that a licensed electrician has attached the cable lug provided with the router
4.
to the grounding cable.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
5.
the strap to one of the ESD points on the chassis.
Place the grounding cable lug over the grounding points on the rear of the chassis.
6.
The upper pair is sized for UNC 1/4-20 bolts, and the lower pair is sized for M6 bolts.
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