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Specifications

Wire Fill for Wyr-Grid

Overhead Cable Tray Routing System

“Y” equates to the height of the Wyr-Grid

Optional Sidewalls. The internal area defines the allowable fill capacity based on the Wyr-Grid

Pathway width and

optional sidewall height. The Wyr-Grid

Pathway cable fill is based on NEC allowable fill of 50%.

The above cable diameters represent the nominal Panduit cable diameter per performance level.

Load Rating for Wyr-Grid

Pathways

Two different industry standards provide methods by which the load rating of a cable tray system is identified. Those standards

are EN 61537:2007 (Cable management – cable tray systems and cable ladder systems) and NEMA VE1/CSA 22.2 (Metal Cable

Tray Systems). The EN 61537:2007 standard takes into account various pathway configurations such as Tee Intersections, Cross

Intersections, Straight Sections and Straight Sections with Splice Connectors. The NEMA

VE1/CSA 22.2 load rating test strictly evaluates the straight sections and does not address

any of the directional changes that would need to be fabricated in the field. Furthermore,

it does not identify a deflection limit for the loaded pathways. When specifying a cable

tray system it is imperative that the system will support the required load in any pathway

configuration without excessive deflection. Therefore, the EN 61537:2007 test requirements

for load rating are much more representative to what will be encountered in the field.

The Wyr-Grid

Pathway is unique in that the load rating is not dependent on the height

of a sidewall. The optional sidewalls on the Wyr-Grid

System are simply intended to retain

cables where and when required. They do not contribute to the overall strength of the

product. The sidewall height and pathway width on traditional wire basket systems determine

its load carrying capacity. These systems require the sidewall to be removed when creating

tee intersections and cross intersections, drastically reducing the overall strength of the

pathway. The Wyr-Grid

System does not require sidewall removal when creating

intersections, therefore the overall strength of the pathway is not compromised.

The Wyr-Grid

Pathway System has been engineered and tested to support loads that

greatly exceed its cable carrying capacity. Table 2 provides an example of the practical

loads that will be encountered when the pathway is filled to its capacity utilizing common

data cables

. Identification of the Wyr-Grid

Overhead Cable Tray Routing System load rating

was obtained through testing protocol according to EN 61537:2007. The load rating for the

system is identified as the Safe Working Load (SWL) as shown in Table 2. The SWL is an

evenly distributed load at which the midspan deflection of the cable tray is less than 1/100th

of the span between supports in the longitudinal direction, as shown in Figure 1. Furthermore,

the transverse deflection at the SWL must be less than 1/20th of the cable tray width, as shown in Figure 2. The SWL ratings

in the table apply for Wyr-Grid

Cable Tray installed in any of the following configurations; cable tray only, straight splice, cross

intersections, and tee intersections.

Traditional Wire Basket

Sidewall Removal Required

Wyr-Grid

Pathways

No Sidewall Removal Required

Table 2

Table 1

*The cable load is defined by the maximum wire fill, as shown in Table #1 for each pathway width and 6" depth.

For electro zinc finish replace BL (Black) with EZ.

^In applications where power cables or premise distribution fiber cables are routed on the Wyr-Grid

Pathway, the Safe Working Loads (SWL) also apply.

(in.)

Internal

Area

(in

)

Category 6A (SD)

Dia. 0.240"

6.1mm

Category 6A

Dia. 0.300"

7.6mm

Category 6

Dia. 0.240"

6.1mm

(in.)

Internal

Area

(in

)

Category 6A (SD)

Dia. 0.240"

6.1mm

Category 6A

Dia. 0.300"

7.6mm

Category 6

Dia. 0.240"

6.1mm

12.2

2 24.3 269 172 269

24.2

2 48.3 534 342 534

4 48.7 538 344 538

4 96.7 1069 684 1069

6 73.0 807 516 807

6 145.0 1603 1026 1603

18.2

2 36.3 401 257 401

30.2

2 60.3 666 427 666

4 72.7 804 514 804

4 120.7 1334 854 1334

6 109.0 1205 771 1205

6 181.0 2000 1280 2000

Part Number

Tray

Width

(In.)

Cable Load (lbs/ft)* Safe Working Load (lbs/ft)