B-Line Eaton series wireway, 4" height, 12" length, 4" width, 3RHS NK wireway, Thru holes, No knockouts, Hinged cover, 1, Galvaneal steel, Hinged, AN

It's a 4 x 4 inch cross section running 12 inches long, so a 4 inch square trough in a one foot section. Weight is about 4.026 lb, light enough for one person to hold up while setting the mounting screws.

No. The 4412-3RHS NK is a NEMA 1 enclosure, which is general purpose indoor protection against incidental contact and falling dirt only. It offers no rating against rain, hose-down, or dust ingress, so for an exterior wall or a wet process area you need a NEMA 3R or 4 rated trough instead.

It does not. The NK in 4412-3RHS NK means no knockouts, so every conduit or cable entry has to be field drilled or punched where you want it. That is usually what electricians prefer on a trough run because it keeps unused openings out of the box, but plan on a hole saw or a knockout punch set on site.

A 4 x 4 trough gives 16 square inches of cross section, and code limits conductor fill in a wireway to 20 percent of that, roughly 3.2 square inches of conductor area. That is fine for control wiring, branch circuit conductors, and small feeder taps. For large parallel feeders or heavy conduit-to-trough transitions, step up to a 6 x 6 or 8 x 8 trough instead.

The cover is hinged, so it swings open and stays on the body rather than coming loose in your hands while you are pulling wire. It is held closed with a gasketed retaining screw, so you need a screwdriver to open it and the screw hole is sealed when it's shut.

Mounting is through holes in the back of the trough, so you fasten it directly to the wall, backboard, or strut with your own screws or bolts. No mounting brackets or fasteners are called out as included, so bring hardware suited to the substrate.

It carries CSA C22.2 certification, which is the Canadian standard set referenced for electrical enclosures, so it can be specified on work north of the border as well as in the US.

Yes, wireway is built to be coupled end to end, and the 4412-3RHS NK is a 12 inch section of the same 4 x 4 B-Line series, so sections, elbows, tees, and end plates in that 4 x 4 size line up with it. Order the connectors and closing plates separately, since only the trough section with its hinged cover comes with this part number.

Galvaneal steel at 16 gauge, painted ANSI 61 gray. That is the standard gray used on most industrial panelboards and control enclosures, so a run of this trough matches existing gear on the wall. The galvanneal base under the paint adds corrosion resistance for indoor mechanical and electrical rooms.