Steel City 4" Square Outlet Box, CV Bracket, 1/2" & 3/4" KO

Yes. It is a 4 inch square steel box, 4 by 4 inches at the face, which is the standard footprint for 4S flat covers, single-gang and two-gang plaster/mud rings, and raised device covers. The ring is a separate order, it is not included with the box.

The Steel City 52151 CV 4-inch square box is not weatherproof, so a wet or damp exterior location calls for a box built for it. The Mulberry Royal Mountie is a die-cast aluminum weatherproof 1-gang outlet box, and the Thomas & Betts 2IH3-1 Red-Dot is a 2-gang conduit outlet box with three 1/2-inch hubs for conduit-fed exterior runs. Keep the 52151 CV for interior wall and ceiling mounting.

The 52151 CV is a 4-inch square steel outlet box for ordinary interior wall and ceiling locations. For a classified area, Appleton's explosionproof malleable iron conduit outlet boxes are the alternative: the GRJ series and the universal GRJS series, plus the round GRT75 malleable iron conduit outlet box for smaller single-device taps. Those are conduit-fed castings rather than a bracket-mounted sheet steel box.

CV is Steel City's stud-mount bracket, which fastens to the face and side of a wood stud so the box lands at a fixed setback for the finished wall surface. You nail or screw the bracket rather than the box body, which keeps the box square to the stud. The box itself is 1-1/2 inches deep (38.1mm), so plan your drywall thickness around that setback.

Both are cartons of 25. The L and R suffixes distinguish the bracket orientation on the carton, 52151CV1234-25L and 52151CV1234-25R, so you can order the hand that faces the direction you are framing. A single box is also available as 52151 CV 1/2 3/4. Carton quantity is 25 either way.

Use the steel 52151 CV where you are running EMT or metal-clad cable and need the raceway bonded through the box, or where the spec calls for metallic boxes. For nonmetallic cable in residential framing, a PVC box such as the Cantex EZ Series multi-gang residential outlet box is the usual choice since it needs no bonding and nails straight to the stud. The steel box is also the one to pick if you want the 21 cubic inch capacity of a 4 square rather than a single-gang device box.

The 52151 CV is a single-outlet 4-inch square box 1-1/2 inches deep with 21 cubic inches of volume, sized for standard device work. A dedicated appliance outlet is usually done with a purpose-built box such as the Pass and Seymour P242RRD range and dryer box, a thermoplastic unit made for that receptacle type.

They serve different installs. The Steel City 52151 CV is a 4-inch square steel box with 21 cubic inches of capacity, 11 knockouts, and a CV mounting bracket, listed under UL E2969. The Cantex EZ Box is a PVC multi-gang residential outlet box, so it is a nonmetallic device box for residential rough-in rather than a metal box that accepts conduit or armored cable through knockouts.