B-Line Eaton series Type 1 junction boxes, 18" height, 6" length, 18" width, 1, Screw cover, SC enclosure, Surface mounted, Medium single door, 9 sid

No. The 18186 SC carries a NEMA Type 1 rating, which is indoor use only, for protection against incidental contact with the enclosed equipment and falling dirt. It has no gasket and no water resistance. For a washdown area, a rooftop, or anywhere exposed to rain or hose spray, you need a NEMA 3R, 4, or 4X enclosure instead.

It measures 18 inches high by 18 inches wide with a 6 inch depth, so it needs an 18 by 18 inch clear wall footprint plus 6 inches of projection off the surface. The box weighs 18.2 lb empty, which matters when you are anchoring it to drywall or metal stud rather than solid block.

Knockouts are provided on three faces: 9 on the sides, 9 on the top, and 9 on the bottom. Between top, bottom, and side entries you can bring conduit in from most directions without drilling the box. The back is not knocked out, since the enclosure is built to sit flat against the surface it mounts to.

It is a surface mount enclosure with thru holes in the back for fasteners. You supply anchors or screws suited to your substrate, whether that is concrete, block, or a stud wall. The cover uses keyhole slots, so once the plated cover screws are started you can lift the cover on and off without backing the screws all the way out, which is useful for a box mounted at height.

The 18186 SC is a screw cover box. The cover comes off entirely rather than swinging, which is what you want for a pull box or splice point that is not accessed daily. If technicians need routine access to devices inside, a hinged door enclosure is the better choice.

It is built to UL 50, the enclosure standard for electrical equipment, and it is made in the US. Spec writers on institutional and government work usually want both of those on record.

Order Eaton B-Line part number 18186 SC. The number reads directly as the size: 18 inch height, 18 inch width, 6 inch depth, with SC meaning screw cover.

The 18186 SC gives you 6 inches of interior depth behind an 18 by 18 inch opening. That is plenty for splices, taps, and terminal blocks, and for straight pulls on moderate conduit sizes. For large feeder conduit where NEC pull box sizing drives the dimension off the raceway diameter, check your required straight and angle pull distances against the 18 inch face before you commit, since depth is the limiting number here, not the face.

Carbon steel at 16 gauge, painted in ANSI 61 grey. That is the standard grey used across most commercial electrical gear, so it blends with panels and gutters already on the wall. Cover screws are plated.