Functionality is guaranteed at –40 VDC input voltage, as defined in Telcordia GR-1089-CORE, Issue 5.
Note
We recommend the following wiring conventions, but customer conventions prevail:
• Red wire for battery connections (–48 VDC).
•
Black wire for battery return connections (RET).
•
The battery return connection is treated as DC-I, as defined in Telcordia GR-1089-CORE, Issue 6.
The ground lug must be a dual-hole type, UL Listed, CSA certified and rated to accept the #6 AWG cable.
Two ground posts with two M5 nuts are provided on the NCS 2002 to accommodate the dual-hole lug.
ETSI Power and Ground
The NCS 2002 for ETSI has redundant –48 VDC power connectors (DSUB for DC power module) on the
DC power module. To install redundant power feeds, use the two power cables shipped with the NCS 2002
shelf and one ground cable. For a DC power supply, the fuse rating must not exceed 15A. The voltages –40.5
VDC and –57.6 VDC are, respectively, the minimum and maximum voltages required to power the chassis.
The nominal steady state voltage is -48 VDC.
For AC power feed, use the power cable shipped with the NCS 2002 and one ground cable. For an AC power
supply, the fuse rating must not exceed 10A, 15A, or 20A. For North America, the branch circuit protection
must be rated 20A. The overcurrent/short circuit protection must be in accordance with local and national
electrical codes. The voltage rating value for AC power ranges between 100 VAC to 240 VAC depending on
the standards in various countries. This product is intended for use on the TN and TT power systems.
Only use the power cables shipped with the NCS 2002 shelf.Caution
NTP-L35 Installing the Power and Ground to the NCS 2002 Shelf
This procedure installs power feeds and grounds the
NCS 2002 system.
Purpose
Cisco NCS 2000 Series Hardware Installation Guide
76
Connecting Power and Ground
ETSI Power and Ground
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