Cisco RFGW-10 Hardware Installation Manual page 91

Chapter 3 Cisco RFGW-10 UEQAM Installation
•
For the DC input power cables, select the appropriate wire gauge based on the National Electrical
Code (NEC) and the local codes for 60-amp service at nominal DC input voltage (–48 VDC). Two
pairs of cable leads, source DC (–) and source DC return (+), are required for each power
distribution unit (PDU). These cables are available from any commercial cable vendor. All input
power cables for the chassis should have the same wire gauge and cable lengths should match within
10 percent of deviation.
Each DC input power cable is terminated at the PDU by a cable lug (included in the accessory kit).
The cable lugs must be dual-hole, and have a 90 degree tongue (reference Panduit LCD4-14AF-L).
They must be able to fit over M6 terminal studs at 0.625-inch (15.88-mm) centers.
Note
The DC input power cables must be connected to the PDU terminal studs in the proper positive (+) and
negative (–) polarity. In some cases, the DC cable leads are labeled, which is a relatively safe indication
of the polarity. However, you must verify the polarity by measuring the voltage between the DC cable
leads. When making the measurement, the positive (+) lead and the negative (–) lead must always match
the (+) and (–) labels on the power distribution unit.
•
An earth ground cable is required for each DC PDU. We recommend that you use at least 4-AWG
multi-strand copper wire. This wire is not available from Cisco; it is available from any commercial
cable vendor.
The ground wire cable lug (provided in the accessory kit) should be dual-hole (as shown in
90 degree tongue (reference Panduit LCD4-14AF-L), and able to fit over M6 terminal studs at 0.625 inch
(1.588 cm) centers.
OL-16264-04
Connecting Power to Cisco RFGW-10 UEQAM
Cisco RF Gateway 10 Hardware Installation Guide
Figure 3-18),
3-23