Nortel Meridian 1 Option 11C Planning And Installation Manual page 47

Installing an Isolation Transformer
Transformers with pluggable power cords:
1 Connect the power cords of all Option 11C system equipment to the
outlets on the transformer secondary.
2 Secure an insulated conductor between the ground lug on the main
cabinet of the Option 11C and the SPG lug on the transformer. Place a
"DO NOT DISCONNECT" tag on it.
Do not fasten or tie this conductor to the power cable feeding the
NTAK04 or NTDK78 power supply.
Note: All equipment associated with the Option 11C must be powered
exclusively from the secondary of the transformer, and must be grounded
to the secondary isolated ground lug. Do not connect unrelated
equipment to the Option 11C system isolation transformer.
The transformer primary must be powered through a dedicated circuit. If the
primary has a pluggable cord, ensure an additional ground connection is made
between the Option 11C SPG and a known building ground reference. This
connection is vital for safe and reliable operation. Do not connect any
Option 11C system ground lines to structural steel or water pipes, or any other
unreliable ground path. Use a ground point known to be "clean" and
permanent. Place a "DO NOT DISCONNECT" tag on it. Figure 16 on page
48 shows the pluggable cord connections.
System and site requirements Page 47 of 408
Option 11C Planning and Installation Guide