B-Line Eaton series wiring trough, 12" height, 24" length, 12" width, GRTGV NK wiring trough, Embossed thru holes, No knockouts, Screw cover, 3R, Gal

It's built to NEMA 3R, so it's rated for outdoor use against falling rain and sleet, not for washdown or hose-down areas. The body is galvanized steel in gray with a screw-on cover held by a flange and plated screws, which is what keeps water out at the seam. For indoor-only runs a standard NEMA 1 trough would do, but 3R is what you want on an exterior wall or a rooftop feeder run.

12 inches high by 12 inches wide by 24 inches long. That 12x12 cross section is the number that matters for conductor fill and bend radius at your pull points; the 24 inch length is the section run, and troughs like this are joined end to end with connector plates to make a longer run.

No. The NK in 121224 GRTGV NK means no knockouts, so every side and both ends arrive blank. You drill or punch your own conduit entries wherever the run needs them. That's the right choice when entries don't line up with a standard knockout pattern, but plan on a hole punch or step bit and the correct connectors on site. If you'd rather have factory knockouts, you need a different trough designation.

It's certified to CSA C22.2, so it's acceptable for installations governed by the Canadian Electrical Code. Submit the model designation 121224 GRTGV NK on your submittal and the certification travels with it.

The part to specify is Eaton B-Line 121224 GRTGV NK: 12 high, 12 wide, 24 long, screw cover, no knockouts, gray galvanized. For a matched run every section needs the same 12x12 cross section or the ends won't mate up. Length is the only figure you'd change section to section.

The body is 16 gauge galvanized steel, which is the standard commercial weight for troughs in this size class and is what lets a 12 inch square section span between supports without oil-canning under cover screws. Galvanized rather than painted is the reason it holds up in the damp locations its 3R rating allows.