B-Line Eaton series Type 1 junction boxes, 30" height, 10" length, 30" width, 1, Screw cover, SC NK enclosure, Surface mounted, Medium single door, N

No. The 303010 SC NK carries a NEMA Type 1 rating, which is indoor use only, for protection against incidental contact and falling dirt. It gives no protection against water, oil, dust ingress or corrosion, so keep it out of wet locations, washdown areas and anywhere exposed to weather. For those spots you need a NEMA 3R, 4 or 4X enclosure instead.

It is 30 inches high by 30 inches wide with a 10 inch depth, which is what the 303010 designation reads out. The 10 inch depth is what you want to check first, since that is the clearance the box needs off the wall face and it drives how much wiring gutter and device room you get inside.

No knockouts. The SC NK box ships blank, so every conduit entry gets located and punched in the field. That is normally what you want on a pull or splice box, since you can place entries to suit the run instead of working around factory holes, but plan on a hole punch set and time on the job for it.

It is a surface mount enclosure with thru holes in the back for lag or through-bolting to the wall or structure. The cover is a full screw cover with keyhole slots, so you can back the plated screws out a few turns and lift the cover off without chasing loose hardware, then drop it back on the slots to reinstall. Note this is a screw cover, not a hinged door, so plan clearance to set the panel aside during service.

79.7 lb empty. That is a two-person lift on a wall, and the anchors need to be rated for the box plus conductors and devices inside. Set your mounting points into studs, strut or masonry anchors, not drywall.

The body is carbon steel at 12 gauge wall thickness, painted in ANSI 61 grey. The 12 gauge is heavier than typical light commercial sheet enclosures, which matters when you are punching multiple large conduit entries or hanging weight off the back pan. Grey ANSI 61 is the standard industrial control shade, so it will match existing panels and gutter finished the same way.

It is built to UL 50, the standard covering enclosures for electrical equipment, and it is manufactured in the US. Those two points cover most submittal and Buy American style questions on institutional and government work.

A screw cover box like the 303010 SC NK suits pull and splice points you open rarely, feeder junctions, tap boxes, wireway terminations. The cover seals flat with plated screws and keyhole slots, and there is no hinge or latch to wear. Go to a hinged door enclosure instead when the box holds devices someone opens routinely, like controls, relays or terminal strips you service often, because wrestling a 30 by 30 screw cover off repeatedly is not practical.