Nortel Meridian 1 Option 11C Planning And Installation Manual page 127

Power should never be connected to a cabinet that is not properly
grounded.
2 If the cabinet is connected to a reserve power supply unit (battery
backup), make sure that the circuit breaker on that unit is set to
OFF.
Backup power should never be connected to a cabinet that is not
properly grounded.
3 If not previously installed, install an NTBK80 ground bar near the
cabinet.
Note: The ground bar is intended to be used as a convenient bridging
point for ground wires from up to three nearby Option 11C cabinets.
Additional ground bars are required for remote cabinets, or when more
than three cabinets are collocated.
4 Install a #6 AWG (# 40 Metric Wire Gauge) ground wire from the
ground lug in each cabinet to the NTBK80 ground bar (which is in
turn connected with #6 AWG wire to the ground bus in the AC
power service panel).
Connect the ground wire to the ground lug located in the bottom of the
cabinet next to the cable connectors (Refer to Figure 47 on page 129).
Route the ground wire through the third groove from the left in the
bottom of the cabinet.
Connect the ground wire to the ground bar (Refer to Figure 46 on page
128).
Place a DO NOT DISCONNECT tag on the ground wire.
Installing the system ground Page 127 of 408
WARNING
WARNING
Option 11C Planning and Installation Guide