B-Line Eaton series wireway, 12" height, 24" length, 12" width, G NK wireway, Thru holes, No knockouts, Screw cover, 1, Steel, Plated screws, ANSI 61

No. The 121224 G NK is a NEMA 1 wireway, which is indoor general purpose only. It gives no protection against rain, dripping water, or washdown, so keep it inside dry mechanical rooms, electrical rooms, and conditioned spaces. For a rooftop, exterior wall, or damp area you need a NEMA 3R or 4 raintight trough instead.

It is a 12 inch by 12 inch cross section, 24 inches long. That is a large trough for a gutter body or pull section, and the usable fill is governed by code rather than the box: the NEC limits conductors in a wireway to 20 percent of the interior cross sectional area. On a nominal 12 x 12 that works out to about 28.8 square inches of conductor fill.

No knockouts. The 121224 G NK is a blank body, so every conduit entry has to be field drilled or punched to suit your raceway layout. That is what electricians usually want on a gutter feeding multiple circuits, but if you would rather not punch holes, order the knockout version of the same series instead.

The cover is a screw cover, held on with plated screws around the flange. You unscrew it fully to open the trough, so it is fine for initial pulls and occasional service, but it is slower than a hinged cover if you expect to open the same run often. Hold the screws in a cup when you pull a 24 inch cover off overhead.

The body is 14 gauge steel. That is a heavy wall for a wireway of this size and it resists oil canning and cover distortion when the trough is supported on strut, which matters on a 12 x 12 where the flat sides are wide.

Yes, it is CSA Certified, which is what a Canadian inspector looks for on a wireway installation.

The catalog number is 121224 G NK from Eaton's B-Line series. The number reads as the dimensions plus the type: 12 inch height, 12 inch width, 24 inch length, G body, NK for no knockouts.

That is a common use. A 12 x 12 x 24 inch NEMA 1 screw cover trough with no knockouts works well as an indoor gutter or pull section: punch entries where your conduits land, and the 12 inch inside depth gives you the bending room larger conductors need. It is indoor only, and you will need couplings or connectors to tie it to adjacent sections or fittings, which are not included.

It is painted ANSI 61 gray, the standard gray used on most commercial panelboards, enclosures, and trough, so it lines up visually with existing switchgear and pull boxes in the same room. For institutional buyers standardizing a facility, specifying ANSI 61 across enclosures keeps repairs and additions looking consistent.