Thomas & Betts 54171NV-25 Ceiling Boxes

Yes. The 54171NV comes with built-in non-metallic cable clamps (C-5 type) and is specified for use with non-metallic sheathed cable, so you don't need separate NM connectors. There are two cable knockouts at each end for the clamps.

It has an integral V bracket, so it nails directly to the face of a stud or joist in new work. No bar hanger or separate mounting ears required. For retrofit into a finished ceiling with no accessible framing, a bracketed box like this is the wrong choice; use an old-work or adjustable support box instead.

No fan rating is carried on the 54171NV, so treat it as a standard lighting outlet box, not a fan support box. If you need to hang a paddle fan, go to a fan-rated product: ZenSupply carries the RACO 295-1 round fan-rated ceiling pan in 4 inch steel, the Allied Moulded 9304 fiberglass ceiling fixture support box, and the Pass & Seymour Reiker drop fan and fixture support box.

The 54171NV-25 is a 4 inch octagon drawn steel ceiling box with a V bracket and non-metallic cable clamps, built for non-metallic sheathed cable runs feeding luminaires. If the opening needs a fan-rated support, the RACO 295-1 is a 4 inch round steel fan-rated ceiling pan in the THE INSIDER series, and the Pass & Seymour Reiker drop box is sold as a ceiling fan and fixture support box. For a fan location, specify one of those instead.

Yes, within limits. Each side carries one 1/2 inch conduit knockout, so you can bring 1/2 inch raceway in from either side. For anything larger than 1/2 inch you'd need a different box, since no bigger knockouts are provided.

The 54171NV is drawn steel with a galvanized finish, which is what most commercial and multi-family specs call for and what you want where the box is part of a metal-clad or grounded steel system, or where the fixture load and heat make a metal enclosure preferable. Non-metallic is the alternative for residential NM work and where you want a non-conductive enclosure: ZenSupply carries the Allied Moulded PC244OW FlexBox and the polycarbonate Sliderbox SB-CB.

The 54171NV-25 mounts on a V bracket, which assumes a joist or framing member at the box location. When the fixture has to land between members, the Allied Moulded SB-CB Sliderbox is a polycarbonate ceiling fixture support box designed to be positioned along its support, and the Allied Moulded PC244OW FlexBox is another ceiling fixture support option. Confirm the span and the fixture weight against the support you select.

The 54171NV-25 is a drawn 4 inch octagon 2-1/8 inches deep with 22.5 cubic inches of volume, two cable knockouts at each end and one 1/2 inch conduit knockout each side. The RACO 295-1 is a 4 inch round steel fan-rated ceiling pan, a shallow pan-style body rather than a deep drawn box, so if your conductor count is driving box fill, size the fill against the deeper octagon.

The Thomas & Betts 54171NV-25 is steel with a galvanized finish, a 4 inch octagon drawn body. The Allied Moulded 9304 is fiberglass reinforced and the SB-CB Sliderbox is polycarbonate, so neither provides a metallic enclosure. The RACO 295-1 is a steel ceiling pan if you need metal in a fan-rated form.

Pricing unit of measure is each, and the standard outer carton holds 25 boxes. So a full carton is 25, which is how most contractors and MRO buyers take it for a repetitive lighting rough-in.

No. The 54171NV galvanized steel ceiling box is not RoHS compliant, which matters if you're buying against a sustainability or restricted-substance spec. Buyers with that requirement should look at a non-metallic alternative and verify its compliance documentation.

Yes. The 54171NV is a 4 inch round/octagon box, which is the standard footprint for 4 inch octagon covers, fixture straps, and most lighting canopies. Same hole pattern as any other 4 inch octagon, so it standardizes cleanly across a building's lighting outlets.