Grounding A Dc-Powered Multiservice Switch 7420 - Nortel 7400 Hardware Installation

Grounding a dc-powered Multiservice Switch 7420

Prerequisites
Procedure steps
Multiservice Switch 7400 Hardware Installation, Maintenance, and Upgrade 6.1S2
Ground Nortel Networks Multiservice Switch equipment 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.
1 Connect the green/yellow ground cable (AWG #12 or #14) to the ground
stud located at the bottom left of the rear housing. See the figure
"Grounding a dc power supply for a Multiservice Switch 7420" (page 226).
This wire must be the only wire secured by the nut provided. If you require
other grounds, attach the wires on top of 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 cable
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 cable to a ground point on the frame.
If the device is desk-top or vertical mounted, connect the other end of the
grounding cable to the site ground window.
After you ground the device, wear the antistatic wrist strap to protect the
device and processor cards from electrostatic discharge.
Chapter 39 Hardware procedures 225