B-Line Eaton series Type 3/3R junction boxes, 12" height, 6" length, 12" width, 3R, Hinged cover, RTHC NK enclosure, Surface mounted, Small single do

Yes. The 12126 RTHC NK is a NEMA Type 3R enclosure, which covers outdoor use against rain, sleet and falling dirt. It carries a rain hood over the door and a formed top hinge so water sheds off the cover rather than running into the seam. It is UL 50 listed. Type 3R is not rated for washdown or hose-directed water, so keep it off pressure-washed walls.

It measures 12 inches high by 12 inches wide with a 6 inch depth, so you have a full square face for device plates or terminal strips and 6 inches of back-to-cover room for conduit bodies and wire bending. Shipping weight on the unit is 10 lb.

No. The NK in 12126 RTHC NK means no knockouts, so the box ships with solid walls and you drill or punch your own conduit entries where the run needs them. That is the usual choice for a 3R installation, since every opening you make is one you control and can seal properly. If you want factory conduit openings, order a knockout version instead.

Surface mount, using embossed thru holes in the back of the box. The embossed holes stand the mounting point off the back panel so the fastener does not break the water seal path, which is what you want on an exterior wall. Mounting hardware for your wall type is not part of the box, so pick anchors to suit the substrate and the 10 lb empty weight plus whatever you fill it with.

Yes. The 12126 RTHC NK has a padlock provision on the door, so you can secure it with your own padlock on a tenant site, a parking structure or any exterior location where the box is reachable. The padlock is not supplied.

Both, in effect. The cover is hinged on a formed top hinge so it swings open and stays with the box while you terminate, and it is also removable if you need the door out of the way entirely for a panel drop-in or bench work. Hinged doors are the practical pick when the box is mounted high or over live gear and you do not want to hold a loose cover.

Carbon steel at 16 gauge wall thickness, finished in ANSI 61 grey paint. That is the standard grey used across industrial electrical gear, so it matches adjoining panels and gutters on the same wall. Carbon steel with a painted finish is meant for general outdoor and industrial exposure; for coastal salt air, chemical exposure or washdown areas, stainless or a non-metallic enclosure is the better call.

Type 3R covers outdoor installations exposed to rain, sleet and falling dirt, which is the great majority of exterior wall-mounted junction and pull boxes. Step up to Type 4 when the box will see hose-directed water or heavy washdown, and use Type 12 for indoor dust and dripping oil in a plant. The 12126 RTHC NK, with its rain hood and formed top hinge, is built for the exterior-wall case.

It is the Eaton B-Line series screw cover style Type 3R enclosure, catalog number 12126 RTHC NK, made in the US. The number reads out as the box size and build: 12 high, 12 wide, 6 deep, RTHC for the rain-tight hinged cover, NK for no knockouts.