Cabling the Power Filter Units
ASR 5000 Installation Guide â–„
Power Cable Requirements
You can install up to three chassis in an equipment rack or telecommunications cabinet. Typically power cabling is run
from the office Power Distribution Frame (PDF) to a Power Distribution Panel (PDP) installed in the rack or cabinet and
then to each of the chassis. Due to the required bending radius at each of the system’s PFUs, distributing power through
a PDP allows you to use a smaller, more flexible cable for each chassis.
The following table identifies the recommended gauges for power cables.
Table 47. Recommended Cable Gauge Information
Conductor Sizing Information
Assuming an 80-foot (24 meter) loop length, each cable between the PDF and PDP must be
the equivalent of 350,000 circular mils or greater.
Calculations assume a 0.3 volt drop from the PDF to the PDP, and a 0.3 volt drop from the
PDP to the chassis. This is a total voltage drop of 0.6 volts.
Assuming an 18-foot (5.5 meter) loop length, each cable between the PDP and the chassis
must be the equivalent of 83,690 circular mils (1 AWG) or greater. Use high-flex cable.
Calculations assume a 0.3 volt drop from the PDF to the PDP, and 0.3 volt drop from the fuse
panel to the chassis. This is a total voltage drop of 0.6 volts.
The following figure and table provide details for wiring the PFUs.
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