Replacing An Mx2020 Three-Phase Wye Ac Power Cord; Removing An Mx2020 Three-Phase Wye Ac Power Cord - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
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Replacing an MX2020 Three-Phase Wye AC Power Cord

296
Using a number 2 Phillips (+) screwdriver, tighten the four captive screws on the metal
16.
AC wiring compartment.
Verify that the AC power cord is not touching or blocking access to router components,
17.
and that it does not drape where people could trip on it.
Remove the ESD grounding strap from the ESD points on the chassis. Connect the
18.
strap to an approved site ESD grounding point. See the instructions for your site.
Connect the AC power cord plug to the power source.
19.
Switch on the customer site circuit breakers to provide voltage on the AC power cord.
20.
Remove the ESD grounding strap from the approved site ESD grounding point. See
21.
the instructions for your site. Reconnect the strap to one of the ESD points on the
chassis.
Verify that the LED on the PDM faceplate is lit steadily, indicating that the AC terminal
22.
block is receiving power.
Switch the power switches on all the PSMs to the on (
the router components.
Preventing Electrostatic Discharge Damage to an MX2020 Router on page 320
MX2020 Three-Phase Wye AC Power Distribution Module Description on page 44
MX2020 Three-Phase Delta and Wye AC Power Distribution Module LEDs on page 46
Replacing an MX2020 Three-Phase Wye AC Power Cord on page 296
Troubleshooting the MX2020 Power Subsystem on page 202
MX2020 AC Power Cord Specifications on page 370
The MX2020 router has either one redundant PDM or two redundant PDMs. An AC power
supply cord on a redundant PDM is hot-insertable and hot-removable. When a redundant
PDM is powered down, the other PDM automatically assumes the entire electrical load
for the router. If you have only one PDM, you must power off the system before removing
the AC power supply cord.
Removing an MX2020 Three-Phase Wye AC Power Cord on page 296
1.
2. Installing an MX2020 Three-Phase Wye AC Power Cord on page 299

Removing an MX2020 Three-Phase Wye AC Power Cord

To remove a three-phase wye AC power cord:
Switch off the customer site circuit breakers to the PDM being removed. Make sure
1.
that the voltage across the AC power source cord is 0 V and that there is no chance
that the cord might become active during the installation process.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis.
) position to provide power to
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