stub to the neutral bus bar, and the
from the storage cabinet. If the
black lead to the phase-1, phase-2, or
power source is a 50- to 60-cycles per
phase-3 bus bar.
second (cps), 120-240-volt, single-
(4) Remove the cover from the connector
phase, three-wire distribution system,
of the power cable stub and connect
connect the red and white leads of
the power cable stub to one end of
the power cable stub to the neutral
p o w e r cable
bus bar and the black lead to one of
the 120-volt bus bar of the commer-
(5) Remove the cover from the IN POW-
ER 115V AC receptacle in the power
(3) If the power source is a 50- to 60-
cps, 120-208-volt, 3-phase, four-wire
connect the other end of the power
distribution system, connect the red
and white leads of the power cable
Section III. SIGNAL CONNECTIONS
Caution: Handle the 26-pair connectors
carefully during the coupling and uncoupling
Circuits are connected at the AN/MSC-32
procedures. Do not force or twist the connect-
with a 26-pair cable at the 26-pair receptacle
ors during installation. Never drop or place
or with field
wire at the binding post
an uncovered 26-pair connector on the ground.
(1) Cover removal.
a. In the power signal entrance box 26-
pair receptacle and in the binding post signal
(a) Grasp the knurled collar on each
entrance box binding posts, the SB-22(*) /PT
end of the connector and turn the
collars until the open position is
lines are terminated on pairs 1 through 12,
the No. 1, No. 2, and No. 3 TH-5/TG lines
(2W) are terminated on pairs 13, 14, and 15,
(b) Disengage the cam on top of the
respectively, and the TT-4(*)/TG and TT-
cover from the slot on the connec-
76(*)/GGC lines may be terminated on pairs
t o r collar. Lift and remove the
16 through 21, as desired.
b. In the power and signal entrance box,
(2) Coupling procedure.
the local telephone lines (TA-312/PT) are
(a) Position the two 26-pair connect-
timinated on pairs 22 through 25. The inter-
o r s so that the cams drop into
communication line (LS-147(*)/FI) is termi-
the slots of the knurled collars and
nated on pair 26.
the male contacts are aligned with
the female contacts (C).
(b) Carefully press the two connectors
23. Connection Procedure for 26-Pair
( c ) Lock the two connectors by turn-
the knurled collars until the
To couple a connector of a 26-pair cable
closed position is reached (E).
t o a connector of another 26-pair cable
(d) Lock the two connector covers to-
(such as Cable Assemblies, Telephone CK-
4566/U (250 ft) and CX-4760/U (15 ft) (fig.
(3) Uncoupling procedure.
in a below.
(a) Unlock the 26-pair connectors by
a connector on a 26-pair cable to the recep-
turning the knurled collars until
tacle in the power and signal entrance box
the open position is reached (A).
(b) C a r e f u l l y pull
t h e connectors