Submittal Sheet

AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS
68-0054—06 10
Fig. 14. screwdriver to pry out both sections of knockout.
To Mount Plate at Laminations:
1. Remove the large rectangular knockout in the mounting
plate as shown in Fig. 14.
2. Hold the transformer with the clamp on the end bell fac-
ing you.
3. With the keyhole slots up, fit the mounting plate over the
primary leadwires and the end bell. Insert the small tab
at the bottom of the plate into the slot in the transformer
mounting foot.
4. Insert the mounting screw (provided) through the holes
as shown in Fig. 15. Secure the plate to the transformer,
but do not overtighten the screw.
Fig. 15. Secure plate on transformer with mounting screw and
tab.
Mounting Transformer and Plate on Outlet Box
The mounting plate may be mounted on 4 inch square boxes,
2 x 4 inch rectangular boxes, and on 4 inch octagonal boxes.
1. Line up the plate with the box to determine the proper
mounting holes. The mounting feet and secondary ter-
minals will be outside the box.
2. Remove the mounting hole knockouts if necessary.
3. Mount the plate on the outlet box using two screws
(obtain locally).
Mounting Through Outlet Box Knockout
(“A” and “C” Models Only)
The transformer can be mounted on an outlet box using the
clamp on the primary end bell. The mounting plate (“A”
models only) is not used. To mount the transformer on an
outlet box:
1. Turn the clamp screw almost completely out.
2. From outside box, thread the primary leadwires through
suitable 7/8 inch knockout. Fit the clamp and screw
through the knockout.
3. Tighten the clamp screw securely against the rim of the
knockout. Avoid damaging the leadwires with the
screwdriver.
Panel Mounting (“E” Models Only)
“E” model transformers are designed for mounting inside a
panel using No. 8 screws and washers (obtain locally) through
at least two of the four holes in the laminations. Refer to
Fig. 16.
M9188B
WITH RAISED PORTION OF KNOCKOUTS FACING YOU:
PRY UP TOP SECTION OF LARGE KNOCKOUT
BY INSERTING SCREWDRIVER FIRST AT ONE
SIDE OF SLOT AND THEN AT THE OTHER SIDE.
1.
THEN PRY UP BOTTOM SECTION OF KNOCKOUT.
2.
REMOVE BOTH SECTIONS OF KNOCKOUT WITH PLIERS.3.
SHADED AREAS REPRESENT KNOCKOUTS
AND SCREW SLOTS USED WITH 2 X 4 INCH
OR OCTAGONAL OUTLET BOXES.
IMPORTANT
MOUNT
TRANSFORMER
OTHER SIDE
M9163A
TRANSFORMER
PLATE