Steel City 52151B1234 4 SQ BX,STL,21C,1/2&3/4E-KO 2-BRKT

The 52151B1234 has combination 1/2 and 3/4 inch end knockouts, so each one takes either a 1/2 inch or a 3/4 inch connector without an adapter. There are 15 knockouts in total across the box.

Brackets are built in. The 52151B1234 is a two-bracket box, so it fastens directly to a stud or joist face with no add-on bracket or box hanger needed.

The Steel City 52151B1234 is a steel 4 inch by 4 inch by 1-1/2 inch outlet box with bracket mounting and 15 knockouts, built for dry interior work such as stud-mounted device and junction points. For an exposed exterior location, a weatherproof box is the right family instead: the Mulberry Royal Mountie is a die-cast aluminum 1-gang weatherproof outlet box, and the Thomas and Betts 2IH3-1 Red-Dot is a 2-gang conduit outlet box with three 1/2 inch hubs, where threaded hubs replace open knockouts at the conduit entries.

The Steel City 52151B1234 is a UL-listed steel outlet box for ordinary locations and is not an explosionproof enclosure. Classified areas call for the Appleton GRJ series explosionproof malleable iron conduit outlet box, the Appleton GRJS universal explosionproof malleable iron box, or the Appleton GRT75 malleable iron round conduit outlet box. Those use threaded conduit entries and cast malleable iron bodies rather than the knockout-and-bracket steel construction of the 52151B1234.

Yes, it carries UL file E2969. It's a steel box made in the United States.

Pick by wiring method. The Steel City 52151B1234 is steel with combination 1/2 and 3/4 inch knockouts and integral brackets, which suits EMT, MC, or armored cable where the metal raceway is part of the grounding path. For nonmetallic cable in residential framing, a PVC box like the Cantex EZ Series multi-gang residential box is the usual choice.

Yes. The 52151B1234 is the box body with brackets only, so you add the 4-square cover that matches your device, flat blank, single or two gang device ring, or a raised ring sized to your wall finish depth.

The 52151B1234 is a general-purpose 4 inch square box with 21 cubic inches of volume, 1/2 and 3/4 inch eccentric knockouts and two brackets; it is sized for standard device and junction duty rather than a dedicated appliance receptacle assembly. For a range or dryer drop, the Pass and Seymour P242RRD is a thermoplastic range and dryer box purpose-built for that application.

Yes. The Steel City 52151B1234 is a steel box with two mounting brackets, 15 knockouts and 21 cubic inches of volume, typical of commercial metal-raceway and MC-cable work. For nonmetallic residential rough-in the Cantex EZ Box is a PVC multi-gang residential outlet box, and the Pass and Seymour P242RRD is a thermoplastic range and dryer box. Note that nonmetallic boxes do not provide the metal raceway bonding path the steel 52151B1234 does.

The Steel City 52151B1234 uses combination 1/2 and 3/4 inch eccentric knockouts, so connectors are added at the entries you open. If the job calls for factory threaded entries instead, the Thomas and Betts 2IH3-1 Red-Dot is a 2-gang conduit outlet box with three 1/2 inch hubs and is supplied in packs of 100, and the Appleton GRT75 is a malleable iron round conduit outlet box.

The 52151B1234 is sold each. If you need bulk for a large rough-in, some comparable boxes are packaged in cartons instead, the Thomas & Betts 2IH3-1 for instance is a pack of 100.