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RACO 779 4 in. Square 2-Device Cover, 3/4 in. Raised, Drawn Construction
The RACO 779 is a 4 in. square 2-device cover engineered to close out standard 4 in. square electrical boxes while accommodating two wiring devices in a single, clean opening. This cover features a 3/4 in. raised profile that provides extra clearance for device bodies, wire connections, and switch or receptacle mounting yokes. Manufactured using a drawn construction process rather than a welded assembly, the RACO 779 delivers a seamless, uniform cover with no weld seams to corrode or weaken over time. The cover is cULus Listed, giving electricians and contractors confidence that it meets recognized safety standards for commercial and residential electrical work.
Key Features
- Trade Size: Sized at 4 in. to fit standard 4 in. square electrical boxes used throughout residential and commercial wiring systems.
- Device Configuration: 2-device opening allows two switches, receptacles, or other wiring devices to be mounted within a single cover for space-efficient installations.
- Raised Profile: 3/4 in. raised design creates additional interior clearance for device bodies and conductor connections, reducing crowding inside the box.
- Durable Drawn Construction: Manufactured through a drawn process rather than welding, producing a one-piece cover with consistent wall thickness and no weld seams.
- Square Profile: Square shape matches standard 4 in. square box openings for a flush, finished appearance.
- Cover Function: Serves as a device cover/closure plate for square electrical boxes, protecting wiring devices and connections from the surrounding environment.
Certifications & Compliance
- cULus Listed
Technical Specifications
- Product Type: Cover
- Product Size: 4 in
- Product Shape: Square
- Drawn or Welded: Drawn
- Certified Listed: cULus Listed
Typical Applications
- Commercial and Industrial Electrical Installations
- Junction and Outlet Box Cover Applications
- Two-Device Switch and Receptacle Installations
- Surface-Mounted Wiring Device Enclosures
- New Construction and Electrical Renovation Projects
Why RACO?
RACO builds the 779 cover with drawn construction to deliver a seamless, one-piece design that avoids the weak points common to welded seams. Paired with a 3/4 in. raised profile for practical device clearance and a cULus Listing for code-compliant performance, this 4 in. square 2-device cover reflects the reliable, professional-grade quality electrical contractors count on from RACO for everyday box and device closures.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- RACO-20260916
- Product Type:
- Raised Device Cover
- Product Size:
- 4 in
- Product Shape:
- Square
- Drawn or Welded:
- Drawn
- Certified Listed:
- cULus Listed
- Department:
- Electrical
- Product Subgroup:
- Box Covers
- Product Group:
- Boxes & Enclosures
RACO 779 – Frequently Asked Questions
1) Will the RACO 779 cover fit a standard 4 in. square electrical box?
Yes. The RACO 779 is a 4 in. square cover made to close out standard 4 in. square boxes, matching the box opening for a flush fit. It is a raised device cover, so it mounts to the box ears like any other 4 in. square cover and brings the device openings forward 3/4 in.
2) Can I mount two switches or receptacles in the RACO 779?
That is exactly what it is for. The 779 is a 2-device cover, so two wiring devices (two switches, two receptacles, or one of each) mount in the single opening on one 4 in. square box. If you only need one device on the box, a 1-device raised cover is the right part instead.
3) Is the RACO 779 listed for commercial electrical work?
The 779 is cULus Listed, which covers it for both the US and Canada on commercial and residential installations. If your inspector or spec sheet calls for a listed box cover, that listing is the mark they are looking for.
4) Do I need a raised cover or a flat cover for a 4 in. square box with two devices?
Go raised when the box is crowded. The 779 adds 3/4 in. of depth, which gives device bodies, yokes and wire connections room that a flat cover does not. A flat device cover sits tight to the box face and works only where conductor count and device depth leave the box roomy. The raised version also adds 3/4 in. of projection off the surface, so check your trim or wall finish allows it.
5) Is the RACO 779 cover drawn or welded, and does it matter for a damp or corrosive location?
Drawn, not welded. The 779 is formed as one piece with consistent wall thickness, so there are no weld seams that can corrode or crack. In a garage, plant floor, or anywhere with washdown or chemical exposure, that one-piece body is the practical reason an electrician picks a drawn cover over a welded one.
6) What part number do I order for the RACO 4 in. square two-gang 3/4 in. raised cover?
Order RACO 779. That single model number covers it: 4 in. square, 2-device, 3/4 in. raised, drawn. There are no finish or size options to specify.
7) Can the RACO 779 be used on a surface-mounted box in an exposed ceiling or plant area?
Yes, surface-mounted wiring device enclosures are one of its intended uses, along with junction and outlet box closures in commercial and industrial installations. Mounted on a surface 4 in. square box, the cover closes the box and holds the two devices while protecting the connections inside.
8) Will the RACO 779 work for standardizing two-gang outlets across a building?
It works well as a standard line item for a facility. One part number, 779, handles every 4 in. square box that needs two devices with extra interior clearance, so a property manager or MRO buyer can stock a single cover instead of mixing one-gang and two-gang raised covers. The flat device plate still goes over the devices separately.
How fast can I get the RACO 779 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the RACO 779 come with a warranty?
Absolutely. The RACO 779 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the RACO 779?
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selection,
installation tips, and troubleshooting. Contact Us
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