Hubbell RACO 512 Electrical Box 12.5 cu in 1 Gang Steel

Single-gang steel switch box

The Hubbell RACO 512 is a one-gang electrical box built from steel with a 12.5 cu in capacity. It is intended for residential or light-commercial switch installations where a metallic enclosure is required. The grey finish matches standard fittings and the UL listing confirms compliance with relevant safety standards. This box suits electricians and DIYers running non-metallic sheathed cable into a single switch location.

Knockout and clamp constraints

The box provides a single 1/2 in. knockout on the back and none on the sides, so cable entry is limited to that rear opening. Integral KO clamps and NMSC clamps are included to secure the cable without separate fittings. No side knockouts means lateral conduit or cable runs cannot be accommodated without field modification. The 2-1/2 in. nominal depth fits standard stud cavities but restricts device depth.

12.5 cu in. capacity decides fit

The 12.5 cubic-inch volume determines how many conductors and devices the box can legally contain under fill calculations. Exceeding this limit violates code and creates a fire hazard, so the installer must count every wire, clamp and the switch itself before closing the wall. If the circuit demands more volume, this box cannot be used and a larger enclosure is required.