Nortel Meridian Meridian 1, Planning, Installation And Operating Instructions

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Chapter 3 — System and site requirements Page 29 of 536
Option 11C Compact Planning, Installation, Fault Clearing and CCBR Guide
Location of power outlets
Commercial power outlets must be installed within reach of the power cord
from the cabinet (the power cord from each cabinet is 9 ft 10 in. [3000 mm]
long).
Alternative power installation
If optimal conditions cannot be provided with a dedicated panel, the use of an
Isolation Transformer with the following characteristics it is recommended:
• 120/208/240 V input, over-current protected at primary
• 120/208/240 V available at secondary outputs, each
circuit breaker-protected
• Primary and secondary windings must be fully isolated from one another
• Certified for use locally as a stand alone user product (CSA, UL, or other
locally recognized markings apparent)
• Capable of providing power to all Option 11C Compact system
equipment operating simultaneously at full load
• Equipment unrelated to the Option 11C Compact system must not be
powered from a transformer serving the Option 11C Compact system.
Isolation transformer ground
The transformer ground should have the following characteristics:
• Separate grounds for primary and secondary windings rather than
common ground
• A “clean” and permanent Single Point Ground (SPG) reference at the
transformer secondary for the Option 11C Compact system.
Verify the ground conductors inside the transformer to ensure they are sized
appropriately.
Note: Do not ground the transformer or Option 11C Compact system to
structural steel or water pipes. Connect them to a known building ground
reference.