Hubbell Incorporated RACO 779 Mud Ring 2 Gang Galvanized Zinc Square Box

2-Gang Plaster Ring for Electrical Boxes

The RACO 779 is a double-gang mud ring designed to extend a square electrical box for plaster or drywall finishes. It provides a 9.00 cubic inch capacity for wiring devices and connections. The ring is keyed for plaster application and features a centre-blanked design with tapped ears for secure device mounting. It suits electricians and renovators finishing walls where a standard box sits recessed.

9.00 Cubic Inch Capacity and Device Space

The 9.00 cubic inch volume accommodates the conductors and devices typical of a two-gang installation such as switches or receptacles. The 3/4 inch raise brings the mounting plane flush with thick wall finishes, preventing devices from sitting too deep. When the box fills with multiple cables or larger smart devices, the fixed capacity becomes the limiting factor and cannot be expanded.

Galvanised Zinc Construction with Tapped Ears

The galvanised zinc body resists corrosion in damp or exterior wall cavities. Tapped ears accept standard device screws directly, removing the need for separate mounting brackets. The square 4 by 4 inch footprint matches common box dimensions, while the centre-blanked opening allows flexible device placement. The rigid metal ring holds its shape during plaster work, keeping the device openings true.