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RACO 8189 4-Inch Square Junction Box, 1-1/2" Deep
The RACO 8189 (RAC8189) is a 4-inch square junction box with a 1-1/2" deep body, engineered to serve as a reliable enclosure point for electrical wiring connections and splices. Sized as a standard 4SQ box, model 8189 delivers a compact, widely compatible footprint used across residential, commercial, and industrial wiring systems. The 1-1/2" depth of this RACO box provides practical volume for conductor connections while maintaining a low-profile installation that fits common wall and ceiling cavities. As part of the RACO electrical box family, the 8189 is built to the sizing conventions electricians rely on for consistent, code-familiar installations.
Key Features
- 4-Inch Square Footprint: The RACO 8189 is configured as a 4SQ box, matching the standard 4-inch square format used throughout the electrical trade.
- 1-1/2" Depth: A 1-1/2" deep body (1-1/2D) provides working space for conductors, splices, and device connections within the enclosure.
- Standard Square Box Configuration: The 4-inch square shape is compatible with commonly available covers, mud rings, and device plates sized for 4SQ boxes.
- Junction and Splice Point: Provides an enclosed, accessible location for branch-circuit wiring connections and splices.
- RACO Model 8189: Identified by manufacturer model number 8189 (RAC8189), part of the RACO line of electrical boxes.
- Versatile Mounting: The compact 4-inch square, 1-1/2" deep design suits a range of new construction and retrofit wiring applications.
Technical Specifications
- Refer to manufacturer documentation for complete technical specifications.
Typical Applications
- Electrical Wiring Junctions and Splices
- Device, Outlet, and Switch Box Installations
- Lighting Fixture and Ceiling Box Mounting
- Residential and Commercial Electrical Systems
- New Construction and Renovation Wiring Projects
Why RACO?
RACO is a well-established name in electrical boxes and fittings, relied upon by electrical contractors for consistent sizing and dependable performance. The 8189 4-inch square, 1-1/2" deep box carries that standard forward, offering a straightforward enclosure for wiring connections on both new installations and upgrade work. Choosing a RACO box like the 8189 means working with a format that fits industry-standard covers, plates, and mounting hardware, helping keep installations efficient and code-familiar.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- RACO-20260916
- Product Type:
- Junction Box
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Group:
- Boxes & Enclosures
RACO RACO8189 – Frequently Asked Questions
1) Will standard 4-inch square covers and mud rings fit the RACO 8189 box?
Yes. The 8189 is built to the standard 4SQ format, so covers, mud rings, and device plates sized for 4-inch square boxes fit it. That is the practical reason most electricians stick with the 4SQ footprint: the cover and ring inventory already on the truck works with it.
2) Is a 1-1/2 inch deep 4-square box deep enough, or should I use a deeper box?
The 8189 runs a 1-1/2 inch deep body, which is the common depth for 4-square work and keeps the box shallow enough for typical wall and ceiling cavities while still leaving working room for splices and device connections. If you are stacking several circuits or large conductors and need more cubic volume, step up to a deeper 4-square such as the Orbit 4SDB Series square deep box instead.
3) Does the RACO 8189 come with a cover?
No cover is part of the 8189 itself; it is the box only, and you add a flat cover, mud ring, or device plate sized for a 4-inch square box. If you want a junction box that ships with its cover, the Cantex 5133690 4-1/8 inch junction box includes a cover and a 1/2 inch knockout.
4) Can I use the RACO 8189 outdoors or in a wet location?
The 8189 is a standard indoor-type 4-square enclosure for branch-circuit junctions and splices in residential, commercial, and industrial wiring. For a sealed outdoor or washdown enclosure, use a rated non-metallic or gasketed box instead, such as the Rittal 80181 JB Series hinged-cover box rated IP66/NEMA 4X, or the Carlon E987R polycarbonate screw-cover box.
5) I need more conductor volume than a 1-1/2 inch deep 4-inch square box gives me. What should I use instead?
Step up to a deep 4-inch square box such as the Orbit 4SDB series, a welded steel square deep box with 1 inch knockouts. The RACO 8189 is a 1-1/2 inch deep body, which is sized for splices and device connections in a low-profile wall or ceiling cavity; when the conductor count or the fixture canopy needs more room, the deep square box keeps the same 4SQ footprint and cover compatibility while adding depth.
6) Is a Carlon E987R a substitute for the RACO 8189?
No, they solve different problems. The Carlon E987R is a 6 by 6 by 4 inch polycarbonate screw-cover junction box, a sealed non-metallic enclosure with its own cover, while the RACO 8189 is a 4-inch square steel-trade-standard 4SQ box 1-1/2 inch deep that takes separately ordered 4SQ covers, mud rings, and device plates. If the drawing calls for a 4SQ box behind a device plate, the E987R will not accept that trim or fit the same cavity.
7) What should I use instead of the RACO 8189 for a wet or washdown location?
For an enclosure rated for washdown, the Rittal 80181 JB series hinged-cover junction box is rated IP66/NEMA 4X. The RACO 8189 is a 4-inch square 1-1/2 inch deep box intended as an enclosed splice and device point in residential, commercial, and industrial wiring inside wall and ceiling cavities, so a rated enclosure is the right call where the box is exposed to spray.
8) What is the exact part number to order this RACO 4-inch square box?
Order RACO model 8189. It is also referenced in the trade as RAC8189, and it is a single-model item, so there are no finish or size options to pick.
9) Can I use the RACO 8189 as a ceiling box for a light fixture?
Yes, the 8189 is used for lighting fixture and ceiling box mounting along with device, outlet, and switch box installs. For a fixture you will pair it with the appropriate 4-square fixture cover or mud ring, which is ordered separately.
10) For standardizing 4-inch square boxes across a multi-building facility, how do the RACO 8189 and Orbit D4SB compare?
Both land on the same 4-inch square, 1-1/2 inch deep format, so a facility standardized on 4SQ trim can stock either without changing covers or mud rings. The RACO 8189 is ordered by its single model number 8189, while the Orbit D4SB is a drawn steel box supplied in packs of 100 - and the Orbit 4SDB is the welded steel deep version if some of your openings need added volume on the same footprint.
11) Can I use a Cantex PVC junction box in place of the RACO 8189 on a nonmetallic run?
On a nonmetallic system you can look at the Cantex E983G non-metallic PVC junction box family, or the Cantex 5133690 4-1/8 inch junction box, which comes with a 1/2 inch knockout and a cover included. The difference that matters on the job: the RACO 8189 is a 4-inch square box sized to the 4SQ convention for standard covers, mud rings, and device plates ordered separately, while the Cantex 5133690 ships as a box-and-cover unit with a single 1/2 inch knockout, so verify your raceway size and whether you need device-plate trim before swapping.
12) I want a junction box that arrives with its cover already included. What are my options versus the RACO 8189?
The Cantex 5133690 4-1/8 inch junction box includes a cover and a 1/2 inch knockout, and the Carlon E987R is a screw-cover box with the cover as part of the enclosure. The RACO 8189 is a 4-inch square 1-1/2 inch deep box built to fit industry-standard 4SQ covers, plates, and mounting hardware, which are specified to suit the application - blank cover, mud ring, or device plate - rather than being fixed to the box.
13) Where can I get the manufacturer spec sheet for the RACO 8189?
RACO publishes a dedicated spec sheet for the 8189 at https://hubbellcdn.com/specsheet/RACO-8189-SPEC-EN.pdf. Use it for knockout layout, gauge, and cubic-inch capacity when a submittal or inspector asks for it.
14) Is the RACO 8189 suitable for retrofit work, not just new construction?
Both. The 4-inch square, 1-1/2 inch deep body is used in new construction and renovation wiring, and the shallow depth is what makes it workable in existing wall and ceiling cavities where a deep box will not seat.
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Does the RACO RACO8189 come with a warranty?
Absolutely. The RACO RACO8189 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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