B-Line Eaton series Type 3/3R junction boxes, 12" height, 6" length, 10" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single doo

Yes. The 12106 RTSC NK is a NEMA 3R enclosure, which means it is built for outdoor use against falling rain, sleet and external ice formation. It adds a rain hood over the cover to shed water, and it is UL 50 listed. Note that 3R is not a washdown or hosedown rating, so for direct spray or dust-tight service you want a 4 or 12 enclosure instead.

It measures 12 inches high, 10 inches wide and 6 inches deep, which is where the 12106 designation comes from. That 6 inch depth is what decides whether your gutter taps, terminal blocks or a small contactor will sit inside with the cover closed, so check your deepest component plus wire bend space before you commit.

No. The NK in the model name means no knockouts, so the box ships blank and you drill or punch your own conduit entries wherever the run lands. That is deliberate on a 3R box, since every hole you make needs to be sealed or located on the bottom to keep the rain rating intact. If you want factory knockouts, order the knockout version of the same RTSC box instead.

The 12106 RTSC NK uses a flanged screw cover, not a hinged door. You back out the plated screws and lift the whole cover away, which gives you full open access to the interior for pulling and landing conductors. The tradeoff is that it is a poor choice where someone needs to get inside daily; a hinged-door enclosure is faster for routine access.

It is a surface mount enclosure with embossed thru holes in the back panel, so your fasteners pass through raised bosses that hold the box body off the mounting surface. That standoff matters outdoors because it lets water drain behind the box instead of pooling against it. Mounting fasteners and anchors are sized to your substrate and are supplied by the installer.

The body is 16 gauge carbon steel with a painted finish in ANSI 61 gray. Painted carbon steel is the standard choice for outdoor 3R service and holds up in normal weather exposure, but it is not stainless. For coastal salt air, chemical plants or wastewater sites, specify a stainless or non-metallic enclosure rather than painted steel.

The 12106 RTSC NK carries a UL 50 listing, the standard covering enclosures for electrical equipment, which is what most specs and inspectors look for on a job. It is made in the United States, which matters on federally funded and Buy American projects.

It is finished in ANSI 61 gray, the same standard light gray used across most industrial panelboards, control enclosures and switchgear, so it blends into an existing lineup rather than standing out. Useful if you are adding a pull box to a wall of equipment and want it to read as part of the same installation.

Empty weight is 8.7 lb, so it is a one-person set on a ladder. Bear in mind that is the bare enclosure; once conduit, conductors and any mounted devices are added, the anchors need to carry considerably more, so size fasteners to the loaded weight and the substrate rather than to the 8.7 lb figure.