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Section 2 Installation
Stub Bend
A stub bend is a 90° bend that usually
brings a horizontal run of conduit up or down
to an outlet box. Practicing this basic bend
will help you become familiar with the conduit
bender.
1. Measure the height of the total bend. This
is typically from the bottom of the horizontal
conduit to the bottom of an electrical box.
2. Take this distance and subtract the radius
of the conduit bender. The resulting number
is the distance to mark from the end of the
conduit.
3. Place the conduit in the bender with this
mark aligned to the bender’s arrow.
4. Press down on the foot pedal of the
bender (while guiding the handle to keep
the bend perpendicular to the floor) until
the stub is 90°.
5. Use a torpedo level to confi rm that the stub
is vertical. See Figure 4-18.
Back-to-Back Bend
A back-to-back bend produces two 90°
bends on a single length of conduit. After the
bends are made, both ends of the conduit are
pointing in the same direction.
1. Create the fi rst bend by following the stub
bend procedure.
2. Mark the distance from the outside of the
fi rst bend to the position where the outside
of the second bend should be.
3. Place the conduit into the bender so that
the star point is aligned with this mark.
4. Create the second bend.
5. Mark the conduit where the height of the
second bend should be.
6. Cut the second bend at the mark. This
is much more accurate than trying to con-
trol the height prior to bending, as you
would while making a stub bend. See
Figure 4-19.
Step 1
Subtract 5″ from the total height
of the stub bend. This will be a
10″ stub.
Step 2
Align the arrow of the bender
with the mark on the conduit.
Step 3
Apply pressure on the
bender with your foot.
Your hand should only
guide the direction
of the bend.
Step 4
Stop bending the conduit
when it reaches 90°.
Figure 4-18. Make a stub bend with a conduit bender and check it with a torpedo level.
fi eld bend: A conduit bend that is made in the fi eld (on
the work site).
stub bend: A 90° bend used to bring a usually hori-
zontal run of conduit up into a device box. Also called
a stub-up bend.
back-to-back bend: Describes two 90° bends in the same
piece of conduit, regardless of the distance between
bends.