179
Installing and Wiring Telephone Power Supplies
October 2002
NOTE:
A maximum of four power supplies can be powered from one dedicated 110 volts AC,
20 amperes (or 230 volts AC, 15 amperes) feeder. Use only nonswitched outlets (outlets
not connected to a wall switch).
2 Secure the wall mounting plates to a standard 3/4-inch (2 centimeters) thick plywood
mounting board. Each mounting plate comes with four #10 x 1/2-inch wood screws.
3 The 1145B2 Power Supply is snap-fit onto the bottom wall mounting plate without tools.
4 An installer-provided insulated ground wire, 16 AWG (#12) (1.2 square millimeters) or
greater, is required to connect the power supply frame ground lug to an approved ground.
The frame ground screw is located next to the AC outlet, to the left of the unit.
Mount the 1146B2 Power Distribution Unit
See the 1146B2 Power Distribution Unit in ‘‘Expanded Power Distribution Unit’’ on page 178
.
1 Insert and securely tighten the two supplied #8-32 x 1/2-inch shoulder screws (they have
an unthreaded section at the top) into the top holes designated for 1146B2 Power
Distribution Unit on the bottom plate. Mount the unit on these two shoulder screws,
using the key holes on the back of the unit.
2 Secure the unit by inserting the #8-32 x 1-inch screw through the bottom of the unit (just
above the wire clips) into the plate and tighten.
3 Set the battery back-up switch option to the 1-32 (down) position to provide battery
back-up to all outputs.
4 Connect the power distribution unit to the power supply with the power cable. Refer to
the power supply’s right-hand label to locate the output power connection.
Install the Battery Mounting/Wiring
Three types of back-up batteries are used. See ‘‘Back-Up Battery Rating’’ on page 180
for the
battery type and rating.
1 Insert two #10-32 x 1/2-inch shoulder screws into the top designated battery holes on the
wall mounting plate. Lightly screw in but do not tighten.
2 Place the keyhole slots in the battery bracket on these two screws. The battery cord exits
from the right of the bracket. Make sure the label on the battery is visible. Tighten the
screws securely.
3 Plug the battery cord into the power supply’s right rear receptacle. The rear receptacle is
indicated on the right label.
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