Installation Manual

28 Revision 00b-DRAFT August 23, 2006
Macro Base Station Installation Procedures (NPM-2500)
Connect the Power Supply
Refer to the MOPs before scheduling or beginning any work involving the site’s main power. Before
proceeding with this procedure, ensure that all the necessary site cable layout, runaway, and grid work
has been completed.
 To connect the power cables
1 Ensure that the –48V DC power supply for the base station is powered off.
2 Ensure that each cable (GND, return, and –48V) is terminated with a correctly sized compression lug and
that an anti-oxidant solution has been applied.
3 Connect the Ground (GND) cable to the ground terminal of your power supply. Ensure that the cable is
an appropriate size.
4 Connect the –48V power cable to the –48V terminal of your power supply. Ensure that the cable is an
appropriate size.
5 Connect the Return (RTN) cable to the return terminal of your power supply. Ensure that the cable is an
appropriate size.
6 Connect each cable (GND, return, and –48V) to the base station’s PDP. Use 1/4-inch hex nuts with
1/4-inch split-lock washers when securing the cables. Torque each hex nut to 78 inch-pounds.
7 Ensure the–48V and return power cables are connected to the power supply correctly by performing a
continuity test on each cable.
8 Dress and label the main and return power cables according to the standards and requirements of your
site.
WARNING: Ensure that the necessary requirements and procedures
have been reviewed prior to the start of any power-related activity. Refer to
your power cut-over MOP for procedures specific to your site.
Ensure that the main DC power supply and the base station are powered off
before you begin this procedure. Failure to turn off the power supply may
result in personal injury or death and cause damage to or destruction of the
base station and surrounding equipment.