Thomas & Betts 54151AV-25 Ceiling Boxes

Yes. The 54151AV comes with built-in C-3 armored cable clamps, so armored/metal clad cable lands straight in the box with no added connectors. There are two cable knockouts at each end for those clamps. If you are running EMT or rigid instead, each side carries one 1/2 inch conduit knockout, and you would supply the connector for that.

The 54151AV-25 is a 4 in. octagon drawn steel ceiling box with a V bracket and armored cable (C-3) clamps, 1-1/2 in. deep with 15.8 cu in. of volume. For an opening where a paddle fan is going up, a fan-rated support box is the one to specify instead: the RACO 295-1 is a round fan-rated ceiling pan in 4 in. steel from the INSIDER Series, and the Allied Moulded 9304 and PC244OW FlexBox are ceiling fixture support boxes. The Pass & Seymour Reiker is a drop ceiling fan and fixture support box.

The V bracket is a nail-on style bracket attached to the box body for fastening directly to the side of a joist or stud in new construction, which sets the box face at the finished ceiling plane. The bracket is part of the box, not a loose accessory, so this is a new-work box rather than an old-work retrofit box. For a remodel cut-in where you cannot reach framing, a support box designed for existing ceilings such as the Allied Moulded SB-CB Sliderbox is the better route.

Drawn steel with a galvanized finish, and it is UL listed. Being metallic, it bonds through the armored cable armor and the box itself, which is what inspectors expect on an MC or AC run. If your job calls for a nonmetallic box instead (for example on a nonmetallic cable system or where corrosion is a concern), the Allied Moulded 9304 fiberglass reinforced ceiling fixture support box is the nonmetallic equivalent.

For new-construction lighting outlets fed with armored or metal clad cable, yes. Every box arrives with the C-3 clamps and the V nail-on bracket already fitted, so crews are not matching loose connectors or straps on site, and the 4 inch octagon pattern keeps fixture canopies and covers consistent across openings. Note it is not RoHS compliant, which matters only if your specification requires that.

At 1-1/2 inches deep the 54151AV needs that much clear space behind the finished ceiling plus room for the V bracket to land on the side of a joist. In a 2x framed ceiling that is no issue. Where you have furring channel or a shallow cavity and cannot get 1-1/2 inches, a fan/fixture pan style assembly such as the RACO 295-1 4 inch round ceiling pan is the shallower approach.

The 54151AV-25 is steel with a galvanized finish and armored cable (C-3) clamps, so it is matched to armored and metal clad cable runs. Where a nonmetallic box is wanted instead, the Allied Moulded 9304 is a fiberglass reinforced ceiling fixture support box and the SB-CB Sliderbox is a polycarbonate ceiling fixture support box. Those are different wiring methods and different mounting approaches, so confirm the box suits the cable type at the opening before swapping.

The Thomas & Betts 54151AV-25 carries a V bracket, which fixes it to the framing member at the box location. If the fixture has to sit off the joist, the Allied Moulded SB-CB Sliderbox is a polycarbonate ceiling fixture support box and the PC244OW FlexBox is a ceiling fixture support box, both intended for adjustable ceiling fixture support rather than a fixed bracket mount.

The 54151AV-25 is a bracket-mounted 4 in. octagon steel ceiling box, 1-1/2 in. deep, sold each and packed 25 to the outer carton. For a suspended or drop ceiling installation the Pass & Seymour Reiker drop ceiling fan and fixture support box is the product built for that condition. Choose by how the box is being carried at the opening, since the 54151AV-25 relies on its V bracket landing on framing.