Legrand 880MP User Manual

Module Linking:

1. Multiple services or compartments may be obtained
by ganging together up to three single-gang units
(Cat. No. 880MP).

2. For multiple compartment installations which require
pass-through between mating modules, you must
remove the knockout section on adjacent surfaces.
To do this, break away with a hammer making sure
you remove knockouts which will be facing one
another after linking the assembly (see Figure 1).

Knockout tabs are intended for passage
between boxes only. They are not designed
for the attachment of conduit fittings.

3. To assemble the modular units, first apply solvent

cement around the flat mating surfaces of the
adjacent walls and “dovetail” slots (see Figure 1).
Engage the “dovetails” and slide the units together
until seated (see Figure 2).

Concrete Preparation:

4. Cement conduit closure plugs to unused ports
or use conduit reducers if reduction is required.
Knockout must be removed from closure plug
for use on 1/2" trade size conduit (see Figure 3).

5. Secure the box assembly to prevent floating
during concrete pour. For above grade, screw
or nail the assembly to the concrete form. For
on-grade applications, drive stakes or rebar next
to the box and secure with wire. Make sure the
stakes are below the 3 1/2" [89mm] min. screed
line (see Figure 3).

6. Cut conduit to length and cement to ports/reducers.

7. Make sure the box spacer and mud cap are in
place prior to pouring concrete. The interior
spacer and cap prevent any movement of the
box walls during the pour.

8. Pour concrete to desired depth using graduated

markings on the box exterior as a guide.

Modulink™Nonmetallic
Modular Floor Box

Cat. Nos. 880MP and 880MPA
INSTALLATION INSTRUCTIONS

Installation Instruction No.: 1A0145 R2 – Updated December 2002

Walker®electrical systems conform to and should be properly
grounded in compliance with requirements of the current National
Electrical Code or codes administered by local authorities.

All electrical products may present a possible shock or fire hazard
if improperly installed or used. Walker electrical products bear the
mark as UL Listed and/or Classified and should be installed in
conformance with current local and/or the National Electrical
Code. Look for listing and/or classification mark on product label.

Figure 2

Figure 1

Figure 3

Knockout Tab

Concrete Cover

Dovetail Slot Detail

Box Spacer

Cement

Floor Finishing and Activation:

9. After concrete has cured, saw off the
remainder of the box(es) at floor level
using a wood saw and remove the box
spacer. If the final floor covering is a
thicker than 5/16" [7.9mm], leave enough
of the box protruding above the floor to
compensate (see Figure 4).

10. Wire fill capacity is determined by reading
the first legible volume calibration along
the interior of the box.

11. A cover plate adapter (Cat. No. 880MPA)
is required for each gang or compartment
of the activation. The adapter is installed
by pushing it into the box opening until
firmly seated. The ratchet teeth along
the box interior will retain the adapter
without the use of screws or glue.

12. Bend radius control for fiber optic
communication activations is maintained
by wrapping the cable around the storage
loop on the underside of the cover
adapter prior to installation
(see Figure 5).

13. Attach the trim flange (sold separately)
using four #8-32 screws supplied with trim
flange (see Figure 6).

14. Complete the installation by attaching
the appropriate cover plate option.

Figure 4

Figure 5

Figure 6

Fiber Storage Loop

The Wiremold Company

U.S. and International:
60 Woodlawn Street • West Hartford, CT 06110
1-800-621-0049 • FAX [phone] • Outside U.S.: 860-233-6251
Canada:
850 Gartshore Street • Fergus, Ontario N1M 2W8
1-800-741-7957 • FAX [phone]

IA0145R2 1202

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