Legrand VA Trenchduct Flush Floor Feeder System - Manual

General:
NOTE: These devices are intended to be installed as outlined in Article 374 of the National Electrical Code.
1. Compare and coordinate the architectural and electrical drawings with the Walker installation drawings. Contact your local
Wiremold field sales representative immediately if any dimensions or details are incorrect.
2. On arrival, check the shipment for shortages or damage. Contact your local Wiremold field sales representative immediately
if there are any problems. File a freight claim for any damage directly with the carrier. Protect material and cartons from
moisture damage.
3. Trench and accessories are banded and palletized where required. Lifts will weigh up to 3,000 lbs. All equipment and
expendable supplies necessary to install the trench system are to be furnished by the trenchduct installer.
4. Advise all trades that trenchduct is not to be used as a walkway or crosswalk in moving about or storing any construction
material. The trenchduct installer shall coordinate the placement of concrete with the general contractor in accordance with
Section 6 and the Finishing Notes and Details.
5. VA Full Bottom Trench has a one-piece U–shaped bottom pan or a flat bottom with two spot welded sheet metal angles.
VA Bottomless Trench has sheet metal angles held in place with set screws. Both styles utilize aluminum extruded rails and
exterior leveling screws (shipped separately) to adjust the rail and cover plate assembly. Cover plates and bottom pans or
sheet metal angles can be placed at any location along the extruded side rails.
Trenchduct Installation:
1. Layout:
A. Begin trench layout at a tee, elbow, or center of a run. Strike chalk lines to indicate the location of the trench body or
compartment. The inside width of the trench body is 3/4" [19.1mm] less than the cover width. Overall width is approximate-
ly 1 3/4" [44mm] greater than cover width.
B. Position all trench components for the entire run. Install leveling feet and support if required, but do not permanently fasten
at this time. Position risers in equipment closets so that they are approximately 1" [25mm] to 2" [51mm] away from existing
or future walls. Field drill openings if required and secure grommets or power drops (see Section 2d).
C. Re-check all dimensions, particularly stub ups into walls and closets. If trench has pre-punched openings, check the hole
alignment by removing a cover plate.
D. For bottomless trench: power compartments, grommets, power drops and other internal components should be installed
before placement of trenchduct cover plates. These items must be installed before partitions are welded together.
2. Coupling and Securing:
A. To couple trench pieces together, slide the combination clips midway across each joint and tighten screws. Position
remaining combination clips as shown on the drawings, or a maximum of 40" [1017mm] on center.
B. For bottomless trench: place metal void closures under bottom flange(s), or on top of outside bottom flange of bottomless
trench side rail assembly and secure to deck and trench side rail. Fastening should occur at two locations (staggered) per
panel intersection and a maximum of 24" [610mm] on center (30" [712mm] on center for 30" [712mm] wide deck panel).
C. After all trench pieces are in position, permanently attach leveling feet to the form, concrete sub slab or precast concrete
pad with suitable fasteners. Review drawings for specific details.
D. Use fillet welds 1/2" [12.7mm] or longer, blind rivets or self-drilling screws that do not penetrate into the raceway to
fasten trenchduct and components. Recommended rivet is Avdel #1693-0613 3/16" [4.8mm] dia. x .062 – .250 [1.58mm –
6.35mm] grip range. Use #8 drill bit [.199 dia – 5.0mm]. Only end closures and trenchduct risers are supplied with
attachment hardware.
E. Cover plate hold-down screws have a #2 Phillips recess, and a special #10-14 thread. Order part #431032-040 from
Walker Systems.
VA Trenchduct –
Full, Intermittent, or Bottomless
I N S T A L L A T I O N I N S T R U C T I O N S
Installation Instruction No.: IY0072 R2 – Updated April 2006
Wiremold / Legrand 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. Wiremold / Legrand
electrical products may bear the mark as UL Listed and/or
Classified and should be installed in conformance with current
local and/or the National Electrical Code.
IMPORTANT: Please read all instructions
before beginning.