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Rectangular steel extension ring with eight half-inch knockouts, drawn construction, one-gang handy box type

Hubbell Incorporated

Hubbell Incorporated RACO 665 Extension Ring 1 Gang Steel 13 cu in

SKU CH-5VRV-S7E3Z

Steel extension ring adds 13 cu in capacity to a single-gang handy box with eight 1/2 in knockouts and keyhole mounting for two-hour fire-rated walls

  • TypeElectrical Boxes & Covers
  • 13 cu. in. capacity for extra wiring space
  • Drawn steel construction resists deformation
  • Eight 1/2 in. knockouts simplify cable entry
  • Keyhole slots speed up mounting
  • Acceptable for 2-hour fire-rated walls

Extension Ring 13 cu in

The RACO 665 is a one-gang steel extension ring designed to increase the capacity of an existing handy box. It provides additional wiring space for electrical installations in residential or commercial settings. The drawn steel construction offers durability for standard duty applications. This component is intended for electricians and installers extending box depth.

Drawn steel eight knockouts

Under sustained load the steel body maintains its shape and protects conductors inside the 13 cu. in. volume. Eight 1/2 in. knockouts allow multiple conduit entries without weakening the sidewall. Keyhole mounting slots speed up alignment on the base box. The assembly is acceptable for use in two-hour fire rated walls.

Adds depth to handy box

This ring replaces the need for a deeper single-piece box when only extra cubic inches are required. The upgrade is worth it when the existing handy box is already mounted and conduit runs are fixed. It is not for installers who need a larger gang size or a different knockout pattern.

Highlights

  • 13 cu. in. capacity for extra wiring space
  • Drawn steel construction resists deformation
  • Eight 1/2 in. knockouts simplify cable entry
  • Keyhole slots speed up mounting
  • Acceptable for 2-hour fire-rated walls

Specifications

BrandRACO
TypeElectrical Boxes & Covers

Questions about this item

Does the steel extension ring generate any noise or heat when energized all day?

The RACO 665 is a passive steel enclosure with no moving parts or electrical components, so it produces no noise or heat during continuous operation.

What existing wiring components are required before installing this 13 cu. in. extension ring?

You need a compatible 4 in. x 2 in. handy box or device box already mounted, plus conductors sized for the circuit and appropriate 1/2 in. knockout fittings or cable clamps.

Will this 1-gang ring fit onto older handy boxes that have different knockout patterns?

The ring matches standard 4 in. x 2 in. handy box dimensions and uses key-hole mounting, so it aligns with legacy boxes of the same footprint regardless of knockout layout.

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