B-Line Eaton series Type 3/3R junction boxes, 24" height, 10" length, 18" width, 3R, Screw cover, RTSC enclosure, Surface mounted, Medium single door

Yes, it's a NEMA Type 3R enclosure, so it's built for outdoor use where falling rain, sleet and external ice formation are the concerns. The 241810 RTSC also has a rain hood and plated screws to keep water out of the cover joint, and the cover flange sheds water. It is not a washdown or hosedown rating, so skip it where direct spray or dust-tight sealing is required.

24 inches high, 18 inches wide and 10 inches deep. The model number reads the same way: 24-18-10. Allow clearance above for the rain hood and in front for the screw cover to come off, since it's a surface mounted box and the cover lifts straight off rather than swinging on a hinge.

Nine knockouts are provided in the bottom of the box, which is where you want them on an outdoor 3R install so water runs away from the openings. The top, sides and back are blank, so any entry other than the bottom means drilling or punching your own hole and sealing it with a rated fitting.

It surface mounts using embossed thru holes in the back of the box. The embossing stands the hole off the back panel so the mounting fastener does not break the water seal of the interior. Fasteners and any wall anchors are not part of the box, so pick them for your substrate. At 31.4 pounds empty, plan on two people and solid anchorage, not drywall alone.

It carries UL 50, the standard for enclosures for electrical equipment, which is what an inspector looks for on a NEMA type rated junction box. The rating on the box is Type 3R.

A screw cover box is the right call for pull, splice and terminal work you open rarely. The cover comes off completely, which gives you unobstructed access to all four sides of the interior for pulling conductors, but it's a two-hand job and the cover has to be set down somewhere. If the box houses controls, breakers or anything you open routinely for inspection, a hinged door enclosure is the better pick.

Carbon steel at 16 gauge, painted in ANSI 61 grey. ANSI 61 is the standard light grey used across industrial electrical gear, so it will match existing B-Line, panelboards and control enclosures on the same wall. Carbon steel with paint means field-cut holes and scratches need touch-up paint outdoors, otherwise they rust.

Order Eaton B-Line part number 241810 RTSC. RTSC is the screw cover rain tight series designation, and the digits are the height, width and depth in inches.

No mounting panel is part of the box. The 241810 RTSC is supplied as an enclosure with a flanged screw cover and embossed thru holes for wall mounting; if you need to mount terminal blocks, relays or a subpanel inside, order a separate back panel sized to the 24 x 18 x 10 body.

Country of origin is the United States, which matters on federally funded and Buy American specified work. Note that the box is plain carbon steel with a painted finish, not stainless.