B-Line Eaton series Type 1 junction boxes, 12" height, 4" length, 12" width, 1, Hinged cover, HC NK enclosure, Surface mounted, Small single door, No

No. The 12124 HC NK carries a NEMA 1 rating, which is indoor, general purpose enclosure protection only, with no rating against rain, hose-down, dust, or oil. For outdoor walls, mechanical rooms with washdown, or damp exterior locations, step up to a gasketed NEMA 3R or 4 enclosure instead. Indoors, in a dry electrical room, corridor, or above a ceiling, it is the correct class of box.

It measures 12 inches high, 12 inches wide and 4 inches deep. That 4 inch depth is what usually decides the job: it gives room for wire bending and a few splices or a small terminal strip, but it is not a gutter box for large conductor pulls. Weight is 8.5 lb, so one person can hang it.

No knockouts. The 12124 HC NK is supplied blank, so every conduit entry gets punched or hole-sawn where you want it. That is the point of the NK version: on a retrofit or a panel feed where the conduit run is already set, you drill to match rather than plug factory holes. Budget a step bit or knockout punch set for the install.

The 12124 HC NK is UL 50 certified, which is the enclosure standard inspectors and spec writers look for on junction boxes and cabinets. Country of origin is the US, which matters if the project carries domestic sourcing requirements.

The cover is hinged, so it swings open and stays with the box while you work, no loose cover to set down on a ladder. It is also removable when you need the opening clear for terminating, and it uses a recessed pull ring with a friction dimple to hold shut rather than screws on every corner.

Surface mount, using thru holes in the back of the box. Run your own fasteners through them into the substrate, anchors for masonry or lag screws into blocking or studs. There is no separate mounting bracket or flange kit involved, and fasteners are not part of the box, so pick them for the wall you are hanging it on. At 8.5 lb empty it is a straightforward two anchor job.

It is carbon steel at 16 gauge, painted ANSI 61 grey, which is the standard grey used across most industrial panelboards and control enclosures, so it will read as a match next to existing switchgear and control cabinets. The painted steel body is for dry indoor service; for corrosive or wet areas a stainless or non-metallic enclosure is the better call.

Order Eaton B-Line part number 12124 HC NK. The number reads off the size and configuration: 12 high by 12 wide by 4 deep, HC for hinged cover, NK for no knockouts. If you want factory conduit openings instead, you want the knockout version of the same size rather than the NK.