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RACO 689 Gangable 1-Gang Masonry Box, 3-1/2 in. Deep, Ten TKO's
The RACO 689 is a 1-Gang masonry box built for mounting switches and receptacles directly into block or brick wall construction. This steel electrical box is gangable, allowing installers to combine multiple boxes side by side for multi-device installations, and it measures 3-1/2 in. deep to provide generous interior wiring space. Ten TKO's (knockouts) give electricians flexible, field-selectable entry points for conduit or cable, and the box carries a UL Listing for code-compliant commercial and residential masonry wiring projects.
Key Features
- 3-1/2 in. Deep Design: The RACO 689 offers a 3-1/2 in. box depth, providing ample interior volume for conductors, devices, and wire connections.
- Gangable Construction: This 1-Gang box is gangable, so multiple units can be joined together on the job site to create 2-gang, 3-gang, or larger multi-device masonry boxes as needed.
- Ten TKO's: Ten knockouts (TKO's) give installers multiple field-selectable entry points for conduit or cable, simplifying rough-in on masonry wall installations.
- Durable Steel Construction: Classified as a steel box and cover product, the RACO 689 is built for long-term durability in demanding masonry wall applications.
- 1-Gang Configuration: Sized for a single device, with the option to gang additional boxes for wider device plates and multi-switch/receptacle setups.
- UL Listed: Independently listed for safety and code compliance in commercial and residential electrical work.
Certifications & Compliance
- UL Listed
Technical Specifications
- Product Type: Steel Boxes and Covers
- Product Depth: 3.5 in
- Gangable: Yes
- Certified Listed: UL Listed
Typical Applications
- Masonry Wall Electrical Box Installations
- New Construction Block and Brick Wall Wiring
- Single and Multi-Gang Switch or Receptacle Mounting
- Commercial and Residential Masonry Construction
- Conduit and Cable Rough-In Using Field-Selectable Knockouts
Why RACO?
RACO builds the RACO 689 from durable steel with a gangable 1-Gang design and ten TKO's, giving electricians a versatile, job-ready masonry box for demanding wall construction. The UL Listing backs the box for code-compliant performance, making it a dependable choice for professional electrical installations where reliable device mounting in masonry walls is required.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- RACO-20260916
- Product Type:
- Switch Box
- Product Depth:
- 3.5 in
- Gangable:
- Yes
- Certified Listed:
- UL Listed
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Group:
- Boxes & Enclosures
RACO 689 – Frequently Asked Questions
1) Can the RACO 689 masonry box be ganged for multi-gang switch or receptacle installs?
Yes. The RACO 689 is a gangable 1-gang masonry box, so you can remove the side plates and join units to build 2-gang, 3-gang or wider assemblies on the job for multi-device plates.
2) Is the RACO 689 meant for block and brick walls or for stud framing?
It is a masonry box, built to be set into concrete block or brick wall construction for switches and receptacles. For steel or wood stud framing, a stud-mount box is the right call instead, for example the Thomas and Betts Steel City Adjust-A-Box LXWOWC-25 gangable switch box in pre-galvanized steel, or the non-metallic Cantex EZ20SB EZ Box for steel studs.
3) How deep is the RACO 689 masonry box, and will it fit a standard 4 inch block course?
Box depth is 3-1/2 inches, which is the usual depth used with nominal 4 inch masonry units so the box face sits flush at the wall surface. The depth also gives you room behind the device for conductors and splices.
4) What is the closest steel gangable alternative to the RACO 689 for a single device?
The Thomas & Betts LXWOWC-25 Steel City Adjust-A-Box is a 1-gang gangable switch box in pre-galvanized steel, so it matches the RACO 689 on steel construction, single-gang sizing, and the ability to join boxes side by side for multi-device runs. The difference is the application: the RACO 689 is a masonry box 3-1/2 in. deep intended for block and brick wall construction, while the Adjust-A-Box is a stud-wall box with an adjustable mounting bracket. For a block wall rough-in, the 689 is the one that sets into the masonry course.
5) Should I use the RACO 689 or a non-metallic box in a steel stud partition?
For a steel stud partition, the Cantex EZ20SB EZ Box is the 1-gang non-metallic box built specifically for steel studs. The RACO 689 is a steel masonry box designed to be set into block or brick wall construction, so it is the wrong form factor for a stud cavity. Pick the 689 where the device lands in masonry and the EZ20SB where it lands in a steel-framed partition.
6) How many conduit entries does the RACO 689 have, and do I need to pick the locations before ordering?
Ten TKO's (tapered knockouts) are provided, and they are field-selectable, so you knock out only the ones your conduit or cable run needs at rough-in. Nothing to specify on the order.
7) Is the RACO 689 UL Listed for commercial electrical work?
The 689 masonry box is UL Listed, which is what inspectors look for on commercial and residential device boxes.
8) Is the RACO 689 steel or plastic, and does that matter for grounding?
It is a steel box. A steel box bonds through the raceway or cable armor and the box itself becomes part of the grounding path, unlike non-metallic boxes such as the Allied Moulded P-181 FlexBox thermoplastic box or the fiberglass 2302-NKV, where every ground must be carried on a wire.
9) Can I use the RACO 689 for a single receptacle in a block wall and add a second device later?
Yes on both counts. One 689 handles a single device, and because the box is gangable you can add another 689 alongside it later to carry a two-device plate, as long as the masonry opening is cut to suit.
10) If I need a two-gang opening, can I use the RACO 689 or should I buy a 2-gang box?
The RACO 689 is gangable, so two boxes can be joined on the job site to create a 2-gang masonry opening for a wider device plate. If the wall is not masonry, a factory 2-gang box such as the Allied Moulded 2302-NKV fiberglass reinforced 2-gang switch box gives you the two-device opening in one piece. Choose by wall type first: masonry takes the ganged 689, framed walls can take the molded 2-gang.
11) Is the Allied Moulded P-181 FlexBox a substitute for the RACO 689?
No. The P-181 FlexBox is a 1-gang thermoplastic residential switch and receptacle box rated at 18 cu. in., intended for frame construction. The RACO 689 is a steel masonry box 3-1/2 in. deep that mounts into block or brick and is gangable for multi-device runs. They share the single-device gang size and nothing else about the mounting method, so the P-181 does not drop into a masonry course.
12) Which of these boxes should I standardize on for a facility with both block and drywall partitions?
Most facilities end up carrying two: the RACO 689, a UL Listed steel gangable masonry box 3-1/2 in. deep, for the block and brick walls, plus a framed-wall box such as the Thomas & Betts LXWOWC-25 Steel City Adjust-A-Box 1-gang gangable steel box or the Cantex EZ20SB non-metallic steel stud box for the partitions. Keeping both as 1-gang gangable types means device spacing and plate sizing stay consistent across wall types.
13) What is the manufacturer part number for the RACO 3-1/2 inch deep masonry box?
The part number is RACO 689. There is a single model, so a quote or a standing order only needs that number.
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Does the RACO 689 come with a warranty?
Absolutely. The RACO 689 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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