This floor box is designed to be mounted on
a joist or subfloor. It can be installed on the
top of the joist or from the bottom if the
thickness of the joist is sufficient to allow
installation of the box. If the unit is to be
installed from the bottom of the joist, check
prior to installation to ensure there is
sufficient adjustment remaining as this type
of installation is non-standard.
The unit can also be installed using the old
work (small) bracket that is included. This
bracket facilitates the installation of the box
in areas where the larger new work bracket
cannot be used. The old work bracket edge
is hidden by the cover when installed.
However, before cutting into the wood, you
must ensure that the mounting screws will
properly support the bracket/box installation.
For planning purposes please ensure that
the maximum installed height to the bottom
of the cover does not exceed 1-3/4” above
the top of the mounting bracket.
The kit is listed as a floor box by
Underwriters Laboratories. The kit also has a
two (2) hour fire classification. Only covers
manufactured for this box can be used with
this assembly.
Floor box kit should be installed by a
certified electrician.
MAINTENANCE
To ensure continued service, it is
recommended that the sealing
surfaces of the caps and cover be
kept free of debris
.
Old work bracket
installation for tight
locations or cut-in
situations
IS121 D
Installation – New Work Bracket
1. The new work bracket may be installed on the
floor joist below a 3/4 inch subfloor. When a
thicker subfloor is used we recommend cutting a
hole in the subfloor using the box as a template
and adjacent to the joist so the mounting screws
will engage the joist as well as the subfloor. Use
the four (4) #6x1-3/4” self-tapping screws
supplied with the kit to mount the bracket.
2. If the new work bracket is installed from the
underside of the joist, ensure the alignment with
the box and opening before installing the
bracket. Use the four (4) #6x1-1/4” self-tapping
screws supplied with the kit to mount the
bracket.
3. The romex wire can then be pulled through the
desired clamp and the box aligned in the bracket
slide. Ensure the adjusting screw is aligned on
the bracket and rotate the screw clockwise
using an electric or pneumatic POWER screw
gun. (A manual screwdriver may be used but will
require sufficient force to ensure complete
engagement of self-tapping screw.)
4. Adjust the box flush to 1/2” above floor, leaving
sufficient room to complete the installation.
5. Wire the receptacle in accordance with the
National Electrical Code.
6. Cut the top of the tube containing the Dow Corning
#4 sealant and apply an 1/8 inch bead of the
sealant around the outside rib of the cover that
mates with the box. Align the receptacle on the
recessed bosses and place the cover on the box
with outlet caps open. Push cover into the box
until rib on bottom of cover engages with box.
7. Insert the two (2) #6-32x1” flat-head machine
screws in the holes in the cover, ensuring that
the screw is aligned with and captivates the
receptacle. DO NOT OVER TORQUE. Tighten the
screws to a maximum of 6 to 8 inch pounds.
Ensure bottom of cover flange is flush with top
of box.
8. Remove the plug on the cover that hides the
adjusting screw opening and set it aside where
it will not be misplaced.
9. Using the adjusting screw, adjust the assembly
so cover flange is flush with floor covering. Do
not pre-load the cover against the floor covering.
Place the “button” you previously set aside in a
safe place over the adjusting screw opening.
10. In order to ensure a watertight seal, apply a
thin layer of the Dow Corning #4 sealant
around the cap and cover mating surfaces.
11. Turn the coin slot lock in the center of the cover
in either direction to lock the outlet caps.
Installation – Old Work Bracket
1. As indicated in the prior instructions, ensure
there is sufficient depth of the floor covering to
install the old work bracket. If not, the bracket
must be installed adjacent to the joist where the
screws will engage the joist/flooring for support.
2. Use the box as a template and cut out an
opening in the floor cover.
3. Place the bracket on the side of the opening
where it is to be mounted with the two tabs up
and resting on the surface. (Be careful not to
drop the bracket into the opening.)
4. Install the bracket using the two (2) #6 square
drive trim head screws provided in the kit. Since
the screws are installed at an angle, there may
be a small part of the screw head that
protrudes. This is to be anticipated and will not
interfere with the installation of the box.
5. Use the installation instructions for the new
work bracket from this point forward starting
with step 3.
