User Manual

December 16, 2002 Part 003609A revision 01 65
Chapter 4: Installation Procedures
Attach the Main and Return Power Cables
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 attach the main and return power cables
1 If necessary, remove the PDP rear cover. The rear cover attaches to the PDP
using four #1 Phillips screws.
2 Ensure that all the circuit breakers on the PDP are in the OFF (down) position.
3 Ensure that the main +24V DC power supply is powered off.
4 Connect each of the three main power cables to the positive terminals of your
+24V DC power supply using a minimum of #2 AWG stranded copper wire.
5 Connect each of the three return power cables to the negative terminals on your
+24V DC power supply using a minimum of #2 AWG stranded copper wire.
6 Terminate each of the cables with a two-hole compression lug with the dimensions
shown in Figure 4.5 on page 64. Apply an anti-oxidant solution to each cable
before attaching the compression lug.
NOTE: When crimping the compression lug, ensure that you
are using the appropriate tool. Compression lugs for #2 AWG wire
are colored brown and require that a brown die be used with the
crimping tool.
7 Apply an anti-oxidant solution to the main and return terminals on the PDP.
8 Connect the compression lugs on the return power cables to the three return
terminals shown in Figure 4.7. 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.
9 Connect the compression lugs on the main power cables to the three +24V DC
power terminals shown in Figure 4.7. 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.
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 +24V DC power supply and the NPM 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 NPM
basestation and surrounding equipment.