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System Specifications Plexus 9000 Installation and Operations Manual
Issue 6, April 25, 2003 Section 130-115-000
4-14 Telica, Inc.
4.3 Voltage Drop/Wire Size Selection
The voltage drop allowable between the Telica shelf and the power plant
must be limited to 2.5 V according to Telcordia GR499. Wire size and
resistance are key in maintaining this value. Following are tables to
determine wire size. The Telica shelf is assumed, for these calculations, to
have a worst-case load of 30 amps; the maximum power load is 800
Watts. The distances specified are for one wire and calculations are based
on round trip needs.
Table 4-O is used to determine wire size when the
Plexus 9000 is connected directly to a power source and no Power and
Alarm Panel is used.
Table 4-O. Wire Sizes For Home Run
Home run to shelf (no Power and Alarm Panel)
Wire size Maximum distance to source
6 80
4 157
2
251
1 315
0 393
Note:
Shaded table areas represent wire sizes that cannot be directly
terminated on the lugs provided on the Telica shelf and/or breaker
panel. Crimp-type splices may be used to pigtail to the appropriate
wire size as needed.
T3-B
Table 4-P can be used to determine wire size when connecting a Power
and Alarm Panel to a power source.
Table 4-P. Wire Sizes To Power And Alarm Panel
Power and Alarm Panel Feed
Wire size Maximum distance to source
1 102
0 127
00 159
000 198
0000 250
Note:
Shaded table areas represent wire sizes that cannot be directly
terminated on the lugs provided on the Telica shelf and/or breaker panel.
Crimp-type splices may be used to pigtail to the appropriate wire size as
needed.
T2-B