Legrand Wallduct Medical Raceway System Bodies - Manual (Page 5)

Step 1 For 2 Compartment T-Unit Tunnels –
Position T-Unit as shown before wiring is
installed. Using holes in the tunnel flange as
a guide, drill .170" dia. (#18 drill, [4.318mm])
holes through the bottom of the T-Unit.
Mount the tunnel with the #10-32 self
tapping screws provided.
Step 2 For 2 Compartment T-Unit Tunnels – If the
partition of the adjoining Wallduct sections
have not been installed prior to the assembly
of the T-unit tunnels / bridges, cut the partition
long enough to extend into the T-Unit and abut
the tunnel / bridges as shown.
Step 3 For 2 Compartment T-Unit Tunnels – If the
partitions of the adjoining Wallduct sections
have been installed prior to the assembly of
the T-unit tunnels/bridges, cut the partition
pieces from excess straight body partitions,
as shown below. These pieces are required
to fit between the straight body partitions
and the tunnel/bridges of the T-unit.
Step 1 For 3 Compartment T-Unit Tunnels –
Follow steps 1 through 3 above. When
bridges overlap tunnels, secure the bridge
to the tunnel with a 3/16" pop rivet. Use the
hole(s) located in the bridge as a guide to
drill a 13/64" [5.16 mm] diameter hole for the
pop rivet. Select a pop rivet length suitable
for the tunnel material thickness installed.
SPECIFIC INSTRUCTIONS: T-UNIT TUNNELS
Three and four compartment tunnels are used where duct bodies come together. Compartment tunnels are used to
run different feeds (power and communication) through the same duct bodies. Installation is similar for both three
and four compartment tunnels as shown below in detail.
NOTE: Using tunnels reduces your overall wire fill capacity by 50%
due to reduced area for wires in the system as a whole.
Partition
Tunnel
Partition
Tunnel
Partition
Tunnel
Bridge