Steel City 52151 CVN 4-Inch Square Steel Outlet Box, 21 in³, Non-Metallic Cover

The 52151 CVN measures 4 inches by 4 inches by 1-1/2 inches deep, which is the standard 4-square footprint used with 4-inch square covers and plaster rings. Interior volume is 21 cubic inches.

A non-metallic cover ships with it, which is what the CVN suffix indicates. You do not need to buy a separate blank cover for a junction or splice application. It is sold each.

The box has 11 knockouts, in combination 1/2 and 3/4 inch sizes, so you can land either trade size of conduit or a 1/2 or 3/4 inch cable connector without an adapter.

At 21 cubic inches, box fill works out to nine 12 AWG conductors or eleven 14 AWG, before you deduct for devices, clamps and grounds (a device counts as two conductors, all grounds together count as one). That makes the 52151 CVN comfortable for a multi-circuit splice point where a 18 cubic inch box runs out of room.

The 52151 CVN is a 4 inch square steel box, 4 inches high by 4 inches wide by 1-1/2 inches deep, 21 cubic inches, supplied with a non-metallic cover and built for dry interior work. For an exposed exterior location, use a weatherproof box instead, such as the Mulberry Royal Mountie die-cast aluminum weatherproof outlet box in 1-gang, or the Thomas and Betts 2IH3-1 Red-Dot 2-gang conduit outlet box with three 1/2 inch hubs.

The 52151 CVN is a standard steel 4 inch square outlet box listed to UL E2969 for general wiring, not for classified locations. For hazardous areas, use an explosionproof malleable iron conduit outlet box: the Appleton GRJ series, the Appleton GRJS universal series, or the Appleton GRT75 round malleable iron conduit outlet box.

Yes. The Steel City 52151 CVN carries UL listing E2969, which is what an inspector or a spec writer on a commercial or institutional job will be looking for on a steel outlet box.

Pick the steel 52151 CVN where you are running EMT or metal-clad cable and using the raceway as the equipment ground, or where the job spec calls for metallic boxes. A non-metallic box like the Cantex EZ Series PVC multi-gang residential box suits PVC conduit and nonmetallic cable in residential work, where you carry a separate ground conductor. For hazardous locations neither applies, you would be looking at an explosionproof malleable iron box such as the Appleton GRJ Series.

Not as it ships. It comes with a non-metallic blank cover, which is for splices and junction points. To make it a device outlet you add a 4-inch square plaster ring or device cover sized to your wall finish depth and device count, which also reduces the usable fill below the box's 21 cubic inches.

They serve different installs. The 52151 CVN is a steel box in a 4 inch square single-gang-style footprint, 21 cubic inches, with 11 knockouts and a non-metallic cover. The Cantex EZ Box is a PVC multi-gang residential outlet box. Choose the steel 52151 CVN where a metal box and knockout entries for conduit or cable connectors are wanted; choose PVC where a nonmetallic multi-gang device box suits the wall.

The 52151 CVN uses knockouts, 11 of them in 1/2 and 3/4 inch sizes, so conduit or cable enters through a connector. If the job calls for factory threaded hubs, the Thomas and Betts 2IH3-1 Red-Dot is a 2-gang conduit outlet box with three 1/2 inch hubs, and the Appleton GRT75 is a round malleable iron conduit outlet box.

Yes, country of origin on the 52151 CVN is the United States, which matters if you are buying under a domestic-preference or Buy American procurement requirement.