Tools And Parts Required For Mx480 Router Grounding And Power Connections; Grounding The Mx480 Router - Juniper MX480 Hardware Manual

Tools and Parts Required for MX480 Router Grounding and Power
Connections
To ground and provide power to the router, you need the following tools and parts:
Phillips (+) screwdrivers, numbers 1 and 2
2.5-mm flat-blade (–) screwdriver
7/16-in. (11 mm) hexagonal-head external drive socket wrench, or nut driver, with a torque range
between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm), for tightening nuts to terminal studs on each power
supply on a DC-powered router.
Wire cutters
Electrostatic discharge (ESD) grounding wrist strap
CAUTION:
is 36 lb-in. (4.0 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 power
supply terminal studs. Use an appropriately-sized driver or socket wrench, with a
maximum torque capacity of 50 lb-in. or less. 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 MX480 Router

You ground the router by connecting a grounding cable to earth ground and then attaching it to the chassis
grounding points using UNC 1/4-20 two screws. You must provide the grounding cable (cable lugs are
supplied with the router). To ground the router:
1. Verify that a licensed electrician has attached the cable lug provided with the router to the grounding
cable.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
an approved site ESD grounding point. See the instructions for your site.
3. Ensure that all grounding surfaces are clean and brought to a bright finish before grounding connections
are made.
The maximum torque rating of the terminal studs on the DC power supply
253