B-Line Eaton series Type 3/3R junction boxes, 18" height, 4" length, 18" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Medium single do

Yes. The Eaton B-Line 18184 RTSC NK is a NEMA 3R enclosure, which covers outdoor use against falling rain, sleet and external ice formation. It includes a rain hood over the cover and plated screws to hold up in wet locations. It is not a washdown or hose-down rating, so keep it off surfaces that get direct pressure spray.

It measures 18 inches high, 18 inches wide and 4 inches deep. That 4 inch depth is the one to watch: with a screw cover and a rain hood, deep-bodied devices or stacked terminal blocks can run out of room before the cover seats. Weight is 15.8 lb empty.

No knockouts. The 18184 RTSC NK is the NK (no knockout) version, so every conduit entry gets punched or drilled on site. That is the usual choice for a 3R box, since you control where the penetrations land and can keep them out of the top surface where water would collect.

It carries UL 50, the standard for enclosures for electrical equipment, and it is made in the US. Combined with the NEMA 3R rating, that is normally what an inspector or a spec reviewer is looking for on an outdoor pull or junction box.

It is a screw cover, flanged, with plated screws. Access means backing out the cover screws rather than swinging a hinged door, so plan for a few minutes and a place to set the cover down. If your crew needs frequent access at that opening, a hinged-door style enclosure is the better pick.

Surface mount, using embossed thru holes in the back of the box. The embossed pattern keeps the fastener holes raised off the mounting surface so water tracking down a wall does not wick into the box interior. Mounting hardware and anchors are sized to your substrate and are not part of the enclosure.

Carbon steel at 16 gauge, painted ANSI 61 grey. The 16 gauge body is heavy enough to hold its shape when you punch conduit entries and carry a hub full of feeders. ANSI 61 grey is the standard industrial grey, so it matches most panelboards and control enclosures already on a plant wall. Any field-cut penetration should be touched up to keep the coating intact outdoors.

Order Eaton B-Line 18184 RTSC NK. The number reads straight off the size: 18 high, 18 wide, 4 deep, RTSC for the rain-tight screw cover style, NK for no knockouts. If your job needs factory knockouts, that is a different suffix, so check the drawing before you release the order.

Eighteen by eighteen gives plenty of face area for a splice or a terminal strip, but only 4 inches of depth. For large conductors, NEC pull and bend space rules are driven by conduit size and conductor bend radius, so size the box against those calculations before committing. Straight pulls and moderate-size splices sit fine in this one; large feeders in big trade-size conduit typically need a deeper body.