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I.L. 29C103G
TA250KB Terminal
Terminal
Connectors
Flat-Head
Screw
Figure 2-3 Terminal Installation
NOTICE
The circuit breaker handle must be in the tripped or
OFF position to remove the cover. Instructions for
installing the trip unit accessories are supplied with
the devices.
2-3. If not already installed, mount trip unit and acces-
sories (if required) in circuit breaker frame.
!
WHEN REMOVED AND REINSTALLED, THREAD-
FORMING SCREWS WILL TRY TO REFORM THE
THREADS IN THE BASE. CARE SHOULD BE TAKEN
EVERY TIME A THREAD-FORMING SCREW IS USED
TO ENSURE THE SCREW STARTS IN THE ORIGINAL
THREADS. DAMAGED THREADS CAN RESULT IN
IMPROPER CIRCUIT BREAKER COVER RETENTION.
2-4. Install cover, and secure with pan-head screws fol-
lowed by threadforming screws, as shown in Figure 2-2.
Torque cover screws to 18-23 lb-in (2-2.6 N.m.).
2-5. If not already installed, mount terminals as shown
in Figure 2-3. When using terminal (Catalog No.
TA250KB), secure the terminal to the circuit breaker
using a 1/8-inch socket wrench and torque to 6-8 lb.-ft
(8-11 N.m). After mounting the circuit breaker and
Effective 1/10
Collar
Collar
Socket
Screw
Nut
T250KB Terminal
CAUTION
before installation of the conductors, the terminal mount-
ing screw can be checked or retightened through the
terminal when the conductor screw is removed. When
using terminal (Catalog No. T250KB), secure the termi-
nal to the circuit breaker using screw and nut. Torque to
7-9 lb.-in (0.8-1.0 N.m).
!
THE VOLTAGES IN ENERGIZED EQUIPMENT CAN
CAUSE DEATH OR SEVERE PERSONAL INJURY.
BEFORE MOUNTING THE CIRCUIT BREAKER IN AN
ELECTRICAL SYSTEM, MAKE SURE THERE IS NO
VOLTAGE PRESENT WHERE WORK IS TO BE PER-
FORMED. SPECIAL ATTENTION SHOULD BE PAID
TO REVERSE FEED APPLICATIONS TO ENSURE
NO VOLTAGE IS PRESENT.
NOTICE
Depending on the equipment configuration, the cir-
cuit breaker can be mounted using different styles
of hardware. The following steps describe how to
mount the circuit breaker using standard hardware.
When special hardware is needed (for example, with
the electrical operator), the instruction leaflet
describing the accessory also describes the special
mounting arrangements.
2-6. To mount the circuit breaker, perform the following
steps:
a. For individual surface mounting, drill mounting panel
using the drilling plan shown in Figure 2-4. For panel-
board mounting, only load end support mounting
holes are required. For deadfront cover applications,
cut out cover to correct escutcheon dimensions. (See
Figure 2-5)
b. If circuit breaker includes factory- or field-installed
internal accessories, make sure that accessory
wiring can be reached when the circuit breaker is
mounted.
NOTICE
Labels with accessory connection schematic dia-
grams are provided on the side of the circuit breaker.
A note should be made of the diagrams if the labels
cannot be seen when the circuit breaker is mounted.
WARNING
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