B-Line Eaton series wireway, 3" height, 24" length, 3" width, G NK wireway, Thru holes, No knockouts, Screw cover, 1, Steel, Plated screws, ANSI 61 g

No knockouts. The NK in the 3324 G NK designation means the trough ships blank, so any conduit entry has to be punched or hole-sawed in the field where you want it. That's the reason a lot of contractors prefer it: you place the entries to suit the run instead of working around factory knockouts. If you'd rather not punch steel on site, order a knockout version of the same size instead.

NEMA 1 only. The 3324 G NK is a screw-cover trough for indoor, dry locations - general-purpose protection against incidental contact and falling dirt. It is not gasketed and is not rated for outdoors, washdown, or damp areas. For an exterior or wet run you need a NEMA 3R raintight trough, not this one.

The cover is a screw cover, held on with plated screws along the flange. You back the screws out to lay the whole side open for pulling and splicing, then reinstall them. Plan for a screwdriver or nut driver at every access point; if you're opening the run repeatedly for maintenance, a hinged-cover trough is the friendlier choice.

Through holes in the body. You fasten straight through the trough into the wall, strut, or backpan with your own hardware - anchors, bolts, or strut nuts are not included, so pick fasteners for the surface you're landing on. The through-hole pattern also means the mounting fasteners sit inside the wiring space, so dress conductors clear of the screw heads.

16 gauge steel, finished in ANSI 61 gray. That's the standard commercial weight for small wireway - stiff enough to span between supports without oil-canning and to take field-punched conduit entries without deforming. ANSI 61 gray is the same gray used on most panelboards and control enclosures, so a run of it matches adjacent gear.

It is CSA Certified. That covers the trough for Canadian installations and is the certification a specifier or inspector will look for on the submittal. Note the certification and the NEMA 1 rating go together - the approval is for the indoor, general-purpose application the enclosure is built for.

Eaton B-Line catalog number 3324 G NK. Read the number as 3 x 3 cross section, 24 inches long, G for the ANSI 61 gray finish, NK for no knockouts. If you need the same size in a different length, the trailing digits in the B-Line numbering change with the length, so confirm the full designation rather than just the 33 prefix when you're adding to a run.

Yes. The 3324 G NK is a straight 24 inch trough section only. Joining sections end to end, or turning a corner, takes the matching 3 x 3 fittings from the same NEMA 1 screw-cover family - connectors, elbows, tees, and end plates - which are ordered separately. Mounting anchors are not included either, since the body mounts through holes.