B-Line Eaton series Type 3/3R junction boxes, 18" height, 10" length, 18" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Medium single d

Yes, for outdoor use where falling rain, sleet and snow are the concern. A 3R rating covers rain and sleet resistance but not hosedown or windblown dust, so it is not a substitute for a 4 or 4X box. The 181810 RTSC NK adds a rain hood over the cover and plated screws to handle weather exposure, and it ships with no knockouts so you cut only the conduit entries you need and keep the enclosure sealed everywhere else.

18 inches height, 18 inches width, and 10 inches length/depth. That 10 inch depth is what decides whether your gutter taps, terminal blocks or wire bending space will fit, so check it against your conductor sizes before you commit. It mounts to the wall surface rather than flush.

No knockouts. The RTSC NK enclosure is supplied blank, so every conduit entry is field-punched where your run actually lands. It is 16 gauge carbon steel, so plan on a hole saw or a hydraulic knockout punch rather than a step bit for larger trade sizes.

Mounting is through embossed thru-holes in the back of the box, so the fasteners pass through the enclosure wall at raised bosses that keep the back off the mounting surface. You supply the anchors or lags to suit your substrate, whether that is block, stud or strut. Figure the box at 23.1 lb empty before you size the anchors.

A screw cover is right when the box is opened rarely, for a pull point, splice or gutter tap, since the flanged cover comes off completely and there is nothing to sag or bind. If your crew or a technician needs into it routinely for testing or resetting devices, a hinged or continuous-hinge door enclosure is the better call because you are not managing loose screws and a 18 x 18 cover on a ladder. The 181810 RTSC NK uses a flanged screw cover with plated screws.

Order it as 181810 RTSC NK from Eaton's B-Line series. The number reads out as the dimensions, 18 high by 18 wide by 10 deep, RTSC for the rain-tight screw cover style, and NK for no knockouts.

It is painted ANSI 61 grey, which is the standard light grey used on most commercial switchgear, panels and enclosures, so it will read as a match alongside existing gear in a mechanical room or on an exterior wall. Body is carbon steel, so if the site is coastal or washdown you would want stainless or a 4X box instead.

Yes for a box this size. At 18 by 18 inches with a 10 inch depth, 16 gauge carbon steel gives a cover and body that stay flat and hold the flange seal against the rain hood without oil-canning. The whole assembly weighs 23.1 lb empty, which tells you it is a sheet steel enclosure and not a light-duty utility box.