B-Line Eaton series wiring tro...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$807.43
B-Line Eaton series wiring trough, 4" height, 48" length, 4" width, GRT NK wiring trough, Embossed thru holes, No knockouts, Screw cover, 3R, Steel,

B-Line Eaton series wiring trough, 4" height, 48" length, 4" width, GRT NK wiring trough, Embossed thru holes, No knockouts, Screw cover, 3R, Steel,

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Model: 4448 GRT NK
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$807.43
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Eaton B-Line series wiring trough, 4" height, 48" length, 4" width, GRT NK wiring trough, Embossed thru holes, No knockouts, Screw cover, NEMA 3R, Steel, Plated screws, ANSI 61 gray, 16 gauge

Manufacturer Resources

Product Specs

Certifications:
CSA Certified
Closure Type:
Plated screws
Finish Color:
ANSI 61 gray
Material Thickness:
16 gauge
Mounting Method:
Embossed thru holes
Product Height:
4 in
Product Length Depth:
48 in
Product Weight:
14.593 lb
Product Width:
4 in
Special Features:
Cover is held secure by flange and plated screws
Department:
Electrical
Product Type:
GRT NK wiring trough
Product Details:
GRT NK wiring trough
Product Length:
48 in

B-LINE 4448 GRT NK – Frequently Asked Questions

1) Can the B-Line 4448 GRT NK wiring trough be used outdoors?
It is a NEMA 3R rated trough, so it is built for outdoor use where falling rain, sleet and snow are the exposure. 3R is not a washdown or hosedown rating, so skip it for pressure-washed or dust-tight interiors and spec a 4 or 12 enclosure instead. The steel body is finished in ANSI 61 gray and the cover seals against a flange with plated screws, which is what keeps water out of the top.
2) Does this B-Line trough come with knockouts for conduit?
No. The 4448 GRT NK is the NK (no knockouts) version, so every side and end comes solid. You punch your own openings where the conduit actually lands, which is why most electricians prefer NK for field runs. Through the 16 gauge steel that means a step bit or a knockout punch set. If you would rather have factory holes on a standard pattern, order a knockout version of the trough instead.
3) How does the cover come off on the 4448 GRT NK, and can I pull wire through it later?
It is a screw cover, held by a flange and plated screws. Back the screws out and the full 48 inch length of the trough is open for laying in conductors, which is the point of a trough versus conduit. Nothing latches or hinges, so budget the screw time on a long run, and keep the plated screws with the job since they are the corrosion-resistant ones matched to the 3R rating.
4) How do you mount a B-Line 4448 wiring trough to a wall or strut?
Mounting is through embossed thru holes in the back of the body, so it bolts flat to a wall, backboard or strut run without drilling the enclosure. At 14.593 pounds empty, a 48 inch section on unistrut needs support at both ends; once it is loaded with feeders the weight climbs well past that, so pick your anchors for the filled weight, not the shipping weight.
5) Is the 4448 GRT NK trough listed or certified for inspection?
It is CSA Certified, which is what an inspector in Canada will look for, and it carries a NEMA 3R enclosure type rating. Those are the two marks on the record for this trough.
6) Is 16 gauge steel heavy enough for a wiring trough in a commercial building?
Yes, 16 gauge is the standard commercial body thickness for a trough this size and it holds its shape when you are levering stiff feeders into it. The steel is painted ANSI 61 gray, the usual gear gray, so a run of trough matches switchgear and panelboards on the same wall without repainting.
7) What is the exact part number to order this B-Line trough by?
Order it as Eaton B-Line 4448 GRT NK. The number reads out as the build: 4 inch by 4 inch cross section, 48 inch length, GRT screw-cover trough, NK for no knockouts.
How fast can I get the B-LINE 4448 GRT NK delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the B-LINE 4448 GRT NK come with a warranty?
Absolutely. The B-LINE 4448 GRT NK is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the B-LINE 4448 GRT NK?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the B-LINE 4448 GRT NK from ZenSupply?
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