B-Line Eaton series Type 1 junction boxes, 30" height, 6" length, 24" width, 1, Hinged cover, HC NK enclosure, Surface mounted, Medium single door, N

No. The 30246 HC NK is a NEMA Type 1 enclosure, which is indoor use only and offers no protection against rain, dust, hosedown, or corrosive liquids. Use it in dry indoor electrical rooms, mechanical spaces, and back-of-house areas. If the box is going outside or anywhere it gets wet, you need a Type 3R or Type 4 enclosure instead.

It measures 30 inches high, 24 inches wide, and 6 inches deep. That 6 inch depth is the number to check first: it decides whether your terminal blocks, breakers, or wire bend radius will clear the hinged door when it shuts. The box weighs 47.4 lb empty, so plan on two people or a lift for the 30 inch height during mounting.

No knockouts. The NK in 30246 HC NK means the box ships blank, so every conduit entry gets located and punched in the field with a knockout punch or hole saw. That is the point of the NK version, you put the penetrations exactly where the raceway lands instead of working around a factory pattern. If you would rather have preset openings, order a knockout version of the enclosure.

Surface mount, using thru holes in the back of the enclosure. You anchor straight to the wall or to Unistrut, and the box sits proud of the finished surface. It is not a flush or recessed box, so do not spec it for a wall where the cover has to sit flat with the drywall. Bear in mind the thru holes mean the back panel is penetrated, which is fine for a Type 1 indoor box.

Both, in effect. The 30246 HC NK has a hinged single door so an electrician can open it one-handed for terminations and inspections, and the cover is removable when you need it fully out of the way during rough-in or wire pulling. It also has a recessed pull ring and a friction dimple to hold the door shut. A hinged cover is the practical choice for anything you will open more than once, a screw cover is fine for a box you close and forget.

It is built to UL 50, the standard covering enclosures for electrical equipment, and it is a NEMA Type 1 indoor enclosure. That combination is what most commercial and institutional specs call out for indoor pull boxes, wireways, and terminal cabinets. It is also made in the US, which matters if the project carries domestic sourcing requirements.

The Eaton B-Line catalog number is 30246 HC NK. The digits read as the dimensions, 30 inch height, 24 inch width, 6 inch depth, with HC for hinged cover and NK for no knockouts. Use that full string when ordering or matching an existing box in the field, since the same size exists in knockout and screw cover versions that are not interchangeable.