Legrand WKD Pro Series System User Manual

Walkerduct®Underfloor Duct

®

Walkerduct Pro Series System

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.

I N S T A L L A T I O N I N S T R U C T I O N S

nstallation Instruction No.: 1B0161R3 – Updated May 2009

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IMPORTANT: Please read all instructions before beginning.

OVERVIEW OF SYSTEM:

1. Review and become familiar with all duct components.

2. Keep material and cartons dry.

3. Be careful of sharp edges or burrs when handling any sheet metal parts.

4. All interior duct surfaces that can come into contact with wires shall be smooth.

5. On arrival, check the shipment for shortages or damage. Contact your local Wiremold/Legrand representative

if there are any issues. File freight damage claims directly with your carrier.

Compare and coordinate the architectural and electrical

6.

drawings with Wiremold/Legrand installation drawings.

Contact your local Wiremold/Legrand representative immediately if any details or dimensions are incorrect.

7. Advise all trades that underfloor duct is not to be used as a walkway or crosswalk. Install underfloor
duct system in accordance with Article 390 of the latest National Electric Code.

DUCT CABLE/WIRE SIZE FILL CHART

CABLE/WIRE SIZE No. 2 No. 4

UNSHIELDED 4-PAIR, 24 AWG, CAT 5 0.220 [5.6] 0.038 [24.5] 35 91
TWISTED PAIR 4-PAIR, 24 AWG, CAT 6 0.250 [6.4] 0.049 [31.7] 27 71

TELEPHONE 2-PAIR, 24 AWG 0.140 [3.6] 0.015 [9.9] 86 226

4-PAIR, 24 AWG 0.190 [4.8] 0.028 [18.1] 47 122

25-PAIR, 24 AWG 0.410 [10.4] 0.132 [85.2] 10 26

COAXIAL RG58/U 0.195 [4.9] 0.030 [19.4] 44 116

RG59/U 0.242 [6.1] 0.046 [29.7] 29 75
RG6/U 0.270 [6.8] 0.057 [36.8] 23 61

SHIELDED TYPE 1 0.390 [9.9] 0.119 [76.8] 11 29
TWISTED PAIR TYPE 2 0.465 [11.8] 0.170 [109.7] 7 20

TYPE 3 0.245 [6.2] 0.047 [30.3] 28 74

FIBER OPTIC 2-STRAND 0.180 [4.6] 0.025 [16.1] 53 139

4-STRAND 0.190 [4.8] 0.028 [18.1] 47 124
6-STRAND 0.210 [5.3] 0.035 [22.6] 38 99
FIBER ZIPCORD 0.110 [2.8] 0.010 [6.5] 133 348

THHN/THWN/ 14 AWG 0.111 [2.8] 0.0097 [6.3] 137 359
THWN-2 12 AWG 0.130 [3.3] 0.0133 [8.6] 100 262

10 AWG 0.164 [4.2] 0.0211 [13.6] 63 165

8 AWG 0.216 [5.5] 0.0366 [23.6] 36 95
6 AWG 0.254 [6.5] 0.0507 [32.7] 26 68
4 AWG 0.324 [8.2] 0.0824 [53.2] 16 42

*40% cable fill is the maximum cable allowed by NEC.

DIAMETER AREA (In2) 40% FILL*

Inches [mm]Inches [mm] DUCT DUCT

DUCT:

1. Duct is manufactured in two sizes and in two styles. 2" IPS round preset and Pro Series rectangular preset duct.

a. No. 2 Duct is 3 1/8" wide x 1 1/4" deep [79mm x 32mm] with a cross sectional area of 3.34 sq. in. [2155 sq. mm].
b. No. 4 Duct is 6 1/2" wide x 1 1/2" deep [165mm x 38mm] with a cross sectional area of 8.72 sq. in. [5626 sq. mm].

2. The largest conductor to be installed in either duct shall be 1/0.

3. Preset duct for distribution runs is standard 10' [3m] length with five presets spaced 12" [305mm] from each end and

on 24" [610mm] centers. (Shown below).
a. Other insert spacing is available.
b. Blank duct (duct without preset inserts) is available for home runs, main system feeds and afterset applications.

2" IPS DUCT PRO SERIES DUCT

2" IPS Preset

Mudcap

#4 Duct

#2 Duct

Mudcap

#2 Duct

2" IPS PRESETS SHOWN

12" [305mm] 24" [610mm]

10' [3m]

JUNCTION BOX AND WALKERDUCT INSTALLATION LAYOUT:

1. Secure bench marks at convenient locations on walls or columns wherever the underfloor duct system is to be

installed. This will help establish the level of the finished concrete floor.

Pro Series Preset

Alignment Clip

#4 Duct

STEP 1

STEP 3

First Horizontal

Run of Duct

STEP 4

Vertical Run of Duct

Exterior Wall

2. Obtain the location of the first duct run from the plans.

3. Stretch a base line, at finished floor level, that corresponds with the center of the duct run.

4. In the middle, and at right angles to the line created in Step 3, stretch another line.

5. These two lines should be used as measuring points for laying out the horizontal and vertical runs of duct.

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FOUR-WAY JUNCTION BOXES:

1. Arrows are located on opposing sides of each box to indicate the entrance for feeder raceways. Cables and conductors

ntering these sides of the junction box will be routed on the lower level to more easily pass through the junction box. To

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maintain proper segregation, all arrows must point in the same direction. (See Detail A)

STEP 3

Cat. No. 224JS-1

Junction Box

Indicator Arrow

Winged Shaped End

of corner spacer

STEP 1

Detail A

A

STEP 2

Cat. No. 255-3/4
Conduit Adapter

2. Where the plans indicate a conduit feed coming into the corner of the junction box, use a Catalog Number 255 - (3/4", 1",

1 1/4", 1 1/2", 2" trade size) conduit adapter. For plastic conduit, install a threaded rigid steel nipple and plastic adapter.
Install a grounding lug inside the junction box. Ground in accordance with the National Electric Code.

3. The wing shaped end of the plastic spacer at each corner can be removed (except at tunnel locations) to increase wire
pulling area.

CAUTION:

The center duct cannot be fed with conduit from any of the box corners. The center

duct may be fed through the center duct openings in any side of the junction box.

4. Tunnels isolate each service in multiple duct boxes to create a continuous raceway through the box in both directions.

Two Compartment Tunnel

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LOCATE JUNCTION BOXES:

Junction boxes are used at intersections of duct runs.

Center line

Exterior Wall

1. Locate along the horizontal base line the point where junction boxes are to be centered.

2. Junction boxes must be positioned correctly so that the duct arrangement will conform to the electrical drawings. After the

correct position is established and power and telephone service have been assigned to specific duct runs, the arrow on the
junction box side must be noted. All junction boxes in any interconnecting area must be placed with arrow pointing in
the same direction. This establishes a consistent pattern for all inter-connecting duct runs. When Wiremold/Legrand layout
drawings are provided, the arrows on the installed box must match drawings.

Junction Box Distance Between Duct Ends

Catalog Number Within Junction Box

12JS, JR, HS, or HR 7" [178mm]
14JS, JR, HS, or HR 11 1/8" [283mm]
222JS, JR, HS, or HR 11 1/8" [283mm]
224JS, JR, HS, or HR 15 1/4" [387mm]
3222JS, JR, HS, or HR 15 1/4" [387mm]
244JS, JR, HS, or HR 18 5/8" [473mm]
3224JS, JR, HS, or HR 18 5/8" [473mm]
42222JS, JR, HS, or HR 19 3/8" [492mm]
3424JS, JR, HS, or HR 22" [559mm]
3244JS, JR, HS, or HR 22" [559mm]
522222JS, JR, HS, or HR 23 1/2" [597mm]
3444JS, JR, HS, or HR 25 3/8" [645mm]

3. Proceed with other rows of boxes, making sure that centers are lined up vertical and horizontally with the first row of boxes.
See chart above for dimension to allow for duct length between boxes.

CAUTION:

When field cutting duct to length, always butt factory cut end to factory cut end.

Install field cut end at the end of a given run. Maintains proper insert spacing.

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