Steel City 521511234EW-50R Outlet Boxes

It's a 4 x 4 inch square steel box, 1-1/2 inches deep, with 21 cubic inches of volume. That capacity is what drives your conductor fill count under box-fill rules, so size your device and conductor count against the 21 cubic inches rather than the footprint.

No. The 521511234EW-50R is not a weatherproof box, so keep it to dry and protected interior locations. For an exterior device location, a weatherproof enclosure such as the Mulberry Royal Mountie die-cast aluminum 1-gang weatherproof outlet box is the right type instead.

Yes, it carries UL listing E2969. That matters on inspected commercial and institutional work where the enclosure has to be a listed component.

Depth is 1-1/2 inches (38.1 mm), which is shallow for a 4-inch square. With 21 cubic inches of volume it handles a single device with a modest conductor count, but if you're pulling multiple circuits through or landing a device with pigtails and a ground bundle, step up to a deeper 4-inch square box or add a raised device cover to pick up extra volume.

No. The Steel City 521511234EW-50R is a 4 inch by 4 inch by 1-1/2 inch steel square box listed as not weatherproof, so it belongs in dry interior walls and ceilings. For an exposed exterior device location, the Mulberry Royal Mountie P473899 is a weatherproof 1-gang box in die-cast aluminum, and the Thomas & Betts 2IH3-1 Red-Dot is a 2-gang conduit outlet box with three 1/2 inch hubs for surface conduit runs outside.

Wall or ceiling mounting, with 17 knockouts. That knockout count is the reason this style gets used as a junction or feed-through point as well as a device box, since you can bring multiple conduit or cable runs into the same enclosure.

Fifty boxes per carton. Weight runs 72 lbs per 100, so a full 50-count carton is useful to know for staging multiple units on a rough-in where you're setting boxes by the floor.

Steel, like the 521511234EW-50R, is what you use with metallic raceway and cable where the box is part of the metal system and you need knockout entries for conduit. A nonmetallic box such as the Cantex EZ Series PVC multi-gang residential outlet box is the other route, typically for nonmetallic wiring methods. If the job is a hazardous location, neither applies, you need an explosionproof box like the Appleton GRJ Series malleable iron conduit outlet box.

Order it as Steel City 521511234EW-50R. The -50R suffix reflects the 50-piece carton quantity.

The Steel City 521511234EW-50R is a 1-outlet square steel box, 4 inches by 4 inches by 1-1/2 inches deep. If you need two gangs, the Thomas and Betts 2IH3-1 Red-Dot is a 2-gang conduit outlet box with three 1/2 inch hubs, supplied in packs of 100, while the Cantex EZ Box is a PVC multi-gang residential box.

It's configured for one outlet, in a plain silver steel finish. Since it's a 4-inch square shell, the cover you choose decides the final device opening, so match a single-device cover to it.