B-Line Eaton series wiring trough, 8" height, 72" length, 8" width, GRT NK wiring trough, Embossed thru holes, No knockouts, Screw cover, 3R, Steel,

NEMA 3R is the rating on the 8872 GRT NK, so it's built for outdoor use where falling rain, sleet and snow are the exposure. It is not a washdown or hosedown enclosure, and the screw cover is not gasketed, so keep it out of locations that need a watertight 4 or 4X rating. Steel body with an ANSI 61 gray finish and plated cover screws handles the usual exterior mounting on a wall or strut.

No. The NK in 8872 GRT NK means no knockouts, so every conduit entry has to be field drilled or punched. Plan on a hole saw or a knockout punch set sized to your conduit. If you want factory knockouts on a trough this size, you need the knockout version of the GRT series instead.

Screw cover, not hinged. The cover is held secure by a flange and plated screws, which means you back the screws out and lift the cover off entirely to pull wire. For a trough you expect to open repeatedly for maintenance, a hinged cover version is easier to live with; the screw cover suits runs that get wired once and closed up.

16 gauge steel throughout, finished in ANSI 61 gray, and CSA Certified. The 16 gauge body is the reason it holds shape over a 72 inch unsupported span better than lighter sheet, and the ANSI 61 gray matches standard industrial panelboard and switchgear gray if you are running it alongside existing equipment.

Order it as Eaton B-Line 8872 GRT NK. The number decodes to the size and configuration: 88 for 8 by 8 inches, 72 for the 72 inch length, GRT for the screw cover gutter, NK for no knockouts. Quote that full string including NK, because dropping it gets you the knockout version.

What ships is the trough body with its screw cover and the plated cover screws. Coupling two 72 inch sections into a longer run, or adding a closing plate at a dead end, means ordering those fittings separately, and you will be field cutting the openings anyway since this is the no-knockout version.