B-Line Eaton series Type 1 junction boxes, 30" height, 6" length, 30" width, 1, Screw cover, SC NK enclosure, Surface mounted, Medium single door, No

No. The 30306 SC NK is a NEMA Type 1 enclosure, which is indoor-only protection against incidental contact and falling dirt. It has no gasket rating for rain, hosedown, dust, or oil. For outdoor or wet locations you need a Type 3R, 4, or 4X enclosure instead.

30 inches high, 30 inches wide, and 6 inches deep. That 6 inch depth is what decides most installs: it gives room for wire bending space and small terminal blocks, but it is shallow for stacking breakers or deep-body devices. The box weighs 62.3 lb empty, so plan on two people and anchors rated for that on the wall.

No knockouts. The 30306 SC NK is a no-knockout enclosure, so every conduit entry gets field punched wherever your run lands. Bring a hole punch set sized for your conduit, and note the body is 12 gauge carbon steel, which is heavier than a typical panel wall, so a hydraulic or ratchet punch works better than a hand punch.

It is a screw cover, not a hinged door, so the full cover lifts away once the plated screws are out. B-Line puts keyhole slots on the cover, so you can back the screws out part way, lift the cover off the slots, and set it aside without fully removing every fastener. On a 30 by 30 cover that matters, because you are handling a large panel single handed at height.

Pick the screw cover 30306 SC NK when the box is a pull point or splice point you open rarely, since the cover has to be unscrewed and lifted off each time. If technicians will be inside it routinely for terminations, metering, or troubleshooting, a hinged door enclosure is the better choice because the cover stays captive on the box. Both cover the same indoor NEMA 1 duty.

Surface mount, with thru holes in the back of the box. You supply the anchors or bolts appropriate to your wall, sized to carry a 62.3 lb empty enclosure plus conductors. Thru holes mean the fasteners pass through the back panel, so on a damp masonry wall use standoffs or unistrut to keep the box off the surface.

It carries UL 50 certification, which is the standard for enclosures for electrical equipment, and it is made in the US. The finish is painted ANSI 61 grey, the standard gear grey, so it matches switchboards, panels, and control enclosures already on the wall in most commercial and industrial rooms.

Order Eaton B-Line catalog number 30306 SC NK. The number reads as the dimensions plus the options: 30 inch height, 30 inch width, 6 inch depth, SC for screw cover, NK for no knockouts. If your spec calls for knockouts or a hinged cover, it is a different catalog suffix, so match the letters exactly.