Nortel Meridian 1 Planning, Installation And Operating Instructions page 106

3 Install a #6 AWG ground wire from the remaining ground lug in
the main cabinet to a suitable ground source (the ground bus in
the AC power service panel).
The connection in the AC power service panel should be performed by
a qualified technician or electrician.
4 Place a DO NOT DISCONNECT tag on the ground wire at the
service panel.
—————————— End of Procedure ——————————
Figure 17
Ground lugs in the NTMW08 cabinet
Option 11C Compact
Chapter 10 – Installing the system ground
WARNING
Ground Lugs
Planning, Installation, Fault Clearing and CCBR Guide
Page 87 of 536