B-Line 18126 RTHC NK Eaton series Type 3/3R junction boxes

Yes. The 18126 RTHC NK is a NEMA Type 3R enclosure, so it is rated for outdoor use against falling rain, sleet and external ice formation. It also carries a rain hood over the cover to shed water away from the door seam. What 3R does not cover is hosedown or windblown dust, so if you are washing the wall down or mounting in a dusty yard you want a Type 4 or 4X instead.

No. The NK in 18126 RTHC NK means no knockouts, so the body ships blank and you punch your own conduit entries where your run needs them. Order a hole punch set for the trade sizes you are pulling. The only holes provided are the embossed thru holes in the back for surface mounting.

It is built to UL 50, the standard covering enclosures for electrical equipment, non-environmental considerations. Combined with the Type 3R rating, that is the pair of references an inspector or spec reviewer will look for on an outdoor surface-mounted box. It is manufactured in the US, which matters if you are working a job with domestic sourcing requirements.

The 18126 RTHC NK uses a formed top hinge with a hinged, removable cover, so the door swings up and out of the way while you work and can be lifted off entirely if you need clear access to terminate. There is a padlock provision on the door, so you supply a padlock to secure it. That makes it workable where a facility needs lockable enclosures for unauthorized access control.

Carbon steel at 16 gauge, painted ANSI 61 grey. 16 gauge is the standard weight for a medium single door enclosure this size and gives you a body that will not oil-can when you drill it or hang a back panel in it. The painted finish is the corrosion barrier, so touch up any punched edges or scratches before it goes up outside. For coastal or washdown chemical exposure, a stainless or non-metallic 4X enclosure is the better call.

No panel is included with the 18126 RTHC NK. It is supplied as the enclosure body and hinged cover with the rain hood, so if you are mounting breakers, contactors or DIN rail you need to order a subpanel sized to an 18 x 12 box separately, along with your conduit hubs and fittings since the body has no knockouts.

Surface mount, using embossed thru holes formed into the back of the box. The embossing keeps the fastener heads off the mounting surface so water cannot track through into the enclosure. You supply anchors or lags appropriate to the substrate; at 13.6 lb empty plus whatever you mount inside, block or stud fastening is what you want rather than drywall anchors.