Figure 5-42.Alignment of arrow and take-up mark for bending a 90.
Now, let us see how a 90 is made to fit a specific
situation. Suppose you are going to run the conduit
from the top of a panel to the ceiling and then
horizontally along the ceiling, using 1/2-inch EMT and
a one-shot bender. The first step will be to measure from
the top of the panel to the ceiling. This measurement
will give you the stub length. Assume the length is 18
inches. Measure 18 inches from the end of the conduit
and make a mark at that point. Next, look at table 5-2
and find the take-up for 1/2-inch EMT. The take-up is 5
inches. Now, measure 5 inches back toward the end of
the conduit from your first mark and make a second
mark. This measurement gives you the take-up. Place
the conduit on the floor with the stub in front of you.
Align the bender arrow with the take-up mark, as shown
in figure 5-42. Put one foot on the footrest and hold the
handle with both hands. Apply pressure on the footrest
as you pull the handle until the handle is at about a 30-
degree angle with the floor, as shown in figure 5-43.
You should now have a 90-degree bend with an 18-inch
stub. Remember: Heavy foot pressure is critical to keep
the EMT in the bender groove and prevent kinked
conduit. To check that the bend will fit the situation we
started with, you can place it next to anything that you
know is a right angle and measure from the floor to the
end of the stub. If the bend is not a full 90, place the
bender back on the conduit, and pull more bend. If it is
more than a 90, place the handle of the bender over the
end of the stub, place one foot on the conduit on the
floor, and spring the stub back.
BACK-TO-BACK BENDS.The back-to-back
bend is actually two adjacent 90s made in the same
piece of conduit. You make the first 90 with the amount
Figure 5-43.Right-angle bend, 90.