Nortel Meridian 1 option 11C Planning And Installation Manual page 45

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The following is a list of required site features for an optimal Option 11C
AC-powered system installation.
If the conditions below cannot be provided with a dedicated panel, the use of
an Isolation Transformer is recommended, as described under the heading
"Alternative AC-powered installation" on page 46 of this chapter.
• Dedicated circuit breaker panel
Provides power solely to the Option 11C system and its associated
hardware, such as TTYs, printers, and so on.
Note: It may not always be possible to power a complete system from a
single circuit-breaker panel. For example, an expansion cabinet may be
remotely located.
• Insulated copper ground conductor
Connects the ground bus in the dedicated panel to the main service panel
ground or building ground reference. It must always be routed through
the same conduit as the supply conductors feeding the panel.
• Isolated-ground receptacles
All outlets connected to the dedicated panel must be of the isolated
ground type. A separate circuit is to be used for each device connected to
the panel. Outlets serving the cabinets must be close enough so that the
power cord can reach the cabinet power supply.
For systems equipped with one or two expansion cabinets, a separate
outlet for each cabinet must be provided. Each outlet must be from
separate circuits in the same panel.
• Isolated ground bus in the electrical panel, where permitted by local
codes.
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The maximum distance between a power outlet and the system cabinet
depends on the length of the power cord. In North America, the power cord
is 9 ft 10 in. (3000 mm). In countries outside North America, the power cord
is 8 ft 2 in. (2490 mm).
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