Steel City 52171CVX Outlet Box with Armored Cable Bracket

It comes with an armored cable clamp and bracket built in, so AC or BX lands directly in the box without buying separate cable connectors. The description spells it out as BX with AC clamps and a bracket. If you're pulling EMT or running wire in conduit instead, you'd use the knockouts and your own conduit connectors.

No. The 52171CVX is a 4 inch square steel outlet box, 4 x 4 x 2-1/8 inches, with an armored cable bracket and a steel body intended for dry interior work. For an exposed exterior device location, a weatherproof box such as the Mulberry Royal Mountie 1-gang die-cast aluminum weatherproof outlet box is the construction built for that duty, or a Thomas and Betts 2IH3-1 Red-Dot 2-gang conduit outlet box with three 1/2 inch hubs where rigid conduit is being run to the box.

No. The 52171CVX is a standard steel outlet box listed under UL E2969 for general wiring. Classified locations call for an explosionproof malleable iron body such as the Appleton GRJ series explosionproof conduit outlet box or the Appleton GRJS universal explosionproof conduit outlet box. Those are threaded conduit bodies, so the armored cable bracket approach used with the 52171CVX does not transfer.

Two knockouts, sized 1/2 and 3/4 inch (combination eccentric knockouts), so you can bring in 1/2 inch trade size or knock out the next ring for 3/4 inch without changing boxes.

Yes, it carries UL file E2969. It's also made in the United States, which matters on jobs with domestic sourcing requirements.

Go steel when you're running armored cable or metal conduit and need the raceway bonded through the box, and when the inspector expects a metallic enclosure. A nonmetallic box such as the Cantex EZ Box PVC multi-gang residential box is the choice for NM cable in residential wood framing where no metal continuity is required. The 52171CVX is the metallic side of that decision, with AC clamps already in it.

The 52171CVX is a general purpose 4 inch square box with 30.3 cubic inches of volume and two knockouts sized 1/2 and 3/4 inch, used with a mud ring for standard devices. For a dedicated range or dryer outlet, the Pass and Seymour P242RRD range and dryer box is a thermoplastic assembly made specifically for that receptacle, which avoids building the opening out of a square box and ring.

The 52171CVX is a square 4 x 4 x 2-1/8 inch steel box with a cable bracket, intended to be concealed and fed with armored cable. For an exposed threaded conduit run terminating at a round fixture outlet, the Appleton GRT75 malleable iron round conduit outlet box is the round, conduit-threaded form of that connection.