B-Line Eaton series Type 3/3R junction boxes, 24" height, 8" length, 18" width, 3R, Hinged cover, RTHC enclosure, Surface mounted, Medium single door

Yes. The 24188 RTHC is a NEMA Type 3R enclosure, which means it's built for outdoor use against falling rain, sleet and snow, and it adds a rain hood over the door. It is UL 50 listed. Type 3R is not a washdown or hose-down rating, so if the box will be pressure washed or sit in a dusty, blowing-debris location, you want a Type 4 or 4X box instead.

It measures 24 inches high, 18 inches wide and 8 inches deep. Those are the enclosure's own dimensions, so allow extra space above for the rain hood and enough clearance in front for the hinged door to swing fully open when you're laying out a wall or a strut rack.

It's a surface-mount box with embossed thru holes in the back panel, so it bolts directly to a wall, strut, or backing plate. The embossed holes keep the fastener heads from breaking the back wall's weather seal. Anchors and fasteners are not part of the box, so pick them for the substrate you're fastening to, keeping in mind the empty enclosure weighs 25.8 lb before any devices or conduit load.

The 24188 RTHC comes with 9 knockouts already provided, so you can land conduit without punching the carbon steel body. If your conduit runs don't line up with those locations, you'd need to punch additional openings yourself and re-seal them to keep the 3R rating intact.

Yes. The medium single door has a padlock provision, so you can secure it in a public-facing or tenant-accessible location. The door is hung on a formed top hinge and the cover is removable, which lets you take the door off entirely while you're wiring the box out and hang it back on afterward.

Order Eaton B-Line part number 24188 RTHC. The RTHC designation is the enclosure type, and the leading digits read as the size: 24 high, 18 wide, 8 deep. It's a single configuration, so there are no finish or door options to specify, and it's made in the US.

For a rooftop or an exposed exterior wall where the box only sees falling rain, sleet and snow, a 3R enclosure such as the 24188 RTHC is the normal choice, and the rain hood handles water running down the face. Where the location also gets windblown dust, sprinkler spray or direct hose cleaning, step up to a Type 4 box. Where corrosives or salt air are in play, go to a 4X stainless or non-metallic enclosure rather than painted carbon steel.

Carbon steel with a painted finish in ANSI 61 grey, the standard grey used across most industrial electrical gear. That means it matches the panelboards, disconnects and control enclosures already on the wall in most plants and mechanical rooms, so you're not repainting to standardize a facility.

The body is 16 gauge carbon steel. That's the usual weight for a mid-size 3R wall box: stiff enough to carry mounted devices and conduit without oil-canning the sides, and still drillable and punchable in the field with standard knockout tooling.