Hubbell Incorporated RACO 128 Extension Ring 2 Gangs Steel Octagon Box Type

Extension Ring for Two-Gang Octagon Boxes

This RACO 128 extension ring adds 15.5 cubic inches of capacity to an existing octagon box, creating extra wiring room for two-gang device installations. The drawn steel construction features rounded edges that protect conductor insulation during pulls. It mounts directly onto a standard octagon box to extend depth without changing the footprint. The ring suits residential and light-commercial rough-in work where additional device space is required.

Verify Box Compatibility and Knockout Needs

Confirm the existing octagon box accepts a two-gang extension ring and that the mounting holes align with the 4-inch by 4-inch dimensions. The ring provides four 1/2-inch side knockouts for conduit or cable entry; plan conduit runs to match these locations. No bracket or clamp is included, so the host box must supply secure mounting. Ensure local code permits the added volume for the conductor count you intend to install.

Steel Construction and Daily Installation

The drawn steel body with rounded edges resists deformation when screws are driven and reduces the risk of nicked wires during future maintenance. Four side knockouts allow flexible conduit alignment but require manual removal with a screwdriver or knockout tool. Because no integral bracket or clamp ships with the ring, installers must rely on the host box screws for mechanical support. The 1-1/2-inch depth adds useful working space without protruding excessively into the wall cavity.