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RACO 518S Gangable Switch Box, 2-1/2 in. Deep with STAB-IT Series Connector
The RACO 518S is a 2-1/2 in. deep gangable switch box built for fast, reliable rough-in wiring on switch and receptacle installations. It features a factory-installed STAB-IT Series connector for quick, tool-free cable entry, integral plaster ears for a flush, secure mount in finished wall assemblies, and an 8 in. #12 copper pigtail already installed for simplified grounding and device hookup. As a gangable box, the 518S can be combined side-by-side with additional gangable boxes to build multi-gang switch and outlet assemblies without extra hardware. This box is UL Listed, giving electricians and contractors confidence that it meets recognized safety standards for residential and commercial electrical rough-in work.
Key Features
- Trade Size: 2-1/2 in. deep box profile provides ample interior volume for device and conductor fill in switch and receptacle boxes.
- Gangable Design: Box sides are removable so multiple 518S boxes can be ganged together to form multi-device wall assemblies.
- STAB-IT Series Connector: Integrated STAB-IT connector allows quick, tool-free cable insertion, speeding up rough-in installation.
- Plaster Ears: Built-in plaster ears hold the box flush against drywall or plaster for a clean, secure finished-wall mount.
- Pre-Installed Pigtail: 8 in. #12 copper pigtail comes factory-installed for straightforward grounding and device termination.
- UL Listed: Certified for use in electrical installations that require recognized safety compliance.
Certifications & Compliance
- UL Listed
Technical Specifications
- Product Depth: 2.5 in
- Series: STAB-IT® Series
- Certified Listed: UL Listed
Typical Applications
- Switch and Receptacle Rough-In Wiring
- Multi-Gang Wall Device Assemblies
- New Construction Electrical Installations
- Remodel and Renovation Wiring Projects
- Drywall and Plaster Wall Installations
Why RACO?
RACO switch boxes like the 518S are engineered with practical jobsite features—gangable sides, plaster ears, a STAB-IT connector, and a pre-installed copper pigtail—that reduce installation time while supporting code-compliant results. The UL Listed rating gives electrical contractors and facility teams confidence in using the 518S for dependable, professional-grade switch and receptacle box installations.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- RACO-20260916
- Product Depth:
- 2.5 in
- Series:
- STAB-IT® Series
- Certified Listed:
- UL Listed
- Product Type:
- Switch Box
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Group:
- Boxes & Enclosures
RACO 518S – Frequently Asked Questions
1) Can the RACO 518S switch box be ganged together for a two or three gang assembly?
Yes. The 518S has removable sides, so you can gang boxes side by side to build two, three or more gang switch and receptacle assemblies without buying extra hardware. Each box you add is another 518S, so plan the opening width around the number of devices you need before you nail the first one in.
2) How deep is the RACO 518S and is it deep enough for a wall with 2x4 studs?
The 518S is a 2-1/2 in. deep box. That fits inside a nominal 2x4 stud wall, which gives 3-1/2 inches of depth, with room behind the box. The extra depth over a shallower box matters when you are stacking conductors, pigtails and a device in the same box.
3) What is the STAB-IT connector on the RACO 518S and do I still need separate cable clamps?
The STAB-IT connector is factory installed in the box and takes the cable by pushing it in, no tool and no separate connector to buy. That is the point of the S suffix on the 518S. You are not adding clamps or NM connectors at the box for those entries.
4) What is the closest gangable steel alternative to the RACO 518S switch box?
The Thomas & Betts LXWOWC-25 Steel City Adjust-A-Box is the nearest match in construction and ganging: it is a 1-gang gangable switch box in pre-galvanized steel, so like the RACO 518S it can be combined side by side to build multi-device wall assemblies. The difference is the feature set the 518S carries at the box - a factory-installed STAB-IT Series connector for tool-free cable entry, integral plaster ears, and an 8 in. #12 copper pigtail already installed - while the Adjust-A-Box is built around a depth-adjustable body.
5) Can I use the RACO 518S in steel stud framing, or is there a box made for that?
The Cantex EZ20SB EZ Box is the one specified for that framing - it is a 1-gang non-metallic box built for steel studs. The RACO 518S is a gangable switch box with integral plaster ears that pull it flush to drywall or plaster in finished wall assemblies, and it is UL Listed for residential and commercial rough-in. If the job is metal studs, the EZ20SB is the purpose-built choice; for ganged device assemblies in wood-framed or plaster walls, the 518S is the fit.
6) I need a 2-gang switch box in one piece instead of ganging two boxes together - what should I use?
Use the Allied Moulded 2302-NKV, a fiberglass reinforced 2-gang electrical switch box that arrives as a single two-device enclosure. The RACO 518S takes the other approach: it is a single gangable box whose sides are removable so two or more are joined on the stud to build a multi-gang assembly. Pick the 2302-NKV when you want one body and one set of fasteners; pick the 518S when gang count varies opening to opening.
7) Does the RACO 518S come with a ground pigtail already in it?
It does. An 8 in. #12 copper pigtail is installed at the factory, so grounding and device termination is a matter of making up the splice rather than drilling and running a ground screw.
8) Will the 518S mount flush with drywall or does it need a separate bracket?
Integral plaster ears are part of the box, and they set it flush against the finished drywall or plaster surface when you nail or screw it to the stud. No add-on ring or bracket is needed for a standard flush device mount.
9) Is the RACO 518S UL Listed for commercial work, or residential only?
The 518S is UL Listed and is used for residential and commercial electrical rough-in. That is the box-level listing an inspector or an institutional spec typically asks for; the rest of the assembly still has to be installed to code for the occupancy.
10) Should I use a metal gangable switch box or a non-metallic one?
A gangable steel box like the RACO 518S makes sense when you need to build multi-gang assemblies on wood studs and want a metal enclosure with a bonding pigtail. If you are running non-metallic cable and want a fixed single-gang nail-on with a set volume, a non-metallic box is simpler: ZenSupply carries the Allied Moulded P-181 FlexBox 1-gang thermoplastic box at 18 cu. in. and the Allied Moulded 2302-NKV fiberglass 2-gang box. Non-metallic boxes do not gang, so the gang count is fixed when you choose the box.
11) What part number do I order for the RACO 2-1/2 inch deep gangable switch box?
Order it as RACO 518S. That is the manufacturer part number, and the single model offered for this 2-1/2 in. deep gangable box with the STAB-IT connector.
How fast can I get the RACO 518S delivered?
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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 518S come with a warranty?
Absolutely. The RACO 518S is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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