Grounding A Dc-Powered Multiservice Switch 7440 - Nortel 7400 Hardware Installation

Grounding a dc-powered Multiservice Switch 7440

Prerequisites
Procedure steps
Multiservice Switch 7400 Hardware Installation, Maintenance, and Upgrade 6.1S2
Ground Nortel Networks Multiservice Switch devices to protect both
personnel and equipment.
• Ensure that you have read and fully understand the grounding
requirements. For more information, see NN10600-170 Nortel Networks
Multiservice Switch 7400 Hardware Description. If you use a terminal in
your installation, you must ground both the outlet that provides power to
the terminal and the cabinet or rack to the same distribution panel.
• The ac power cord grounds the ac-powered Multiservice Switch 7440 so
you do not need to perform a separate grounding procedure.
1 Connect the green/yellow ground lead to the ground stud located on the
upper ground strip of rear housing. See the figure "Grounding a dc power
supply for a Multiservice Switch 7440" (page 228).
This wire must be the only wire secured by the nut provided. If you require
other grounds, attach the wires above the first ground nut and add another
nut to secure them.
2 If the device is in a cabinet, connect the other end of the grounding lead
to a grounding nut on the cabinet. See the figure "Multiservice Switch
cabinet grounding points" (page 234).
If the device is in a standard 19" rack, connect the other end of the
grounding lead to a ground point on the frame.
If the device is desk-top mounted, connect the other end of the grounding
lead to the site ground window.
After you ground your device, wear the antistatic wrist strap to protect the
device and processor cards from electrostatic discharge.
Chapter 39 Hardware procedures 227