RACO 155 4 in. Drawn Steel Oct...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$10.93
RACO 155 4 in. Drawn Steel Octagon Box with TS Bracket & AC/MC/Flex Clamps

RACO 155 4 in. Drawn Steel Octagon Box with TS Bracket & AC/MC/Flex Clamps

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Model: RACO155

In Stock (leaves warehouse same day if ordered before 3pm ET)

$10.93
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RACO 155 4 in. Drawn Steel Octagon Box with TS Bracket & AC/MC/Flex Clamps

The RACO 155 is a 4 in. octagon box built from drawn steel, engineered as a durable enclosure for junction and outlet wiring in residential and commercial electrical systems. This box measures 1-1/2 in. deep and features two 1/2 in. knockouts for conduit or cable entry, along with integrated AC/MC/Flex clamps that allow direct termination of armored cable, metal-clad cable, or flexible conduit without additional connectors. A TS bracket, designed for mounting to metal or wood studs, simplifies installation in new construction or remodel framing. The RACO 155 is UL Listed for code-compliant electrical work.

Key Features

  • Trade Size: 4 in. octagon box sized for standard junction and outlet box applications.
  • Durable Construction: Drawn steel body provides consistent wall strength and long-term durability.
  • Box Depth: 1-1/2 in. deep to accommodate wiring and device connections.
  • Knockouts: Two 1/2 in. knockouts provide convenient entry points for conduit or cable.
  • Wiring System Compatibility: Integrated AC/MC/Flex clamps secure armored cable, metal-clad cable, or flexible conduit directly to the box.
  • Mounting Bracket: TS bracket type supports fast, secure installation on metal or wood studs.

Certifications & Compliance

  • UL Listed

Technical Specifications

  • Product Type: Steel Boxes and Covers
  • Product Size: 4 in
  • Product Depth: 1.5 in
  • Drawn or Welded: Drawn
  • Bracket Type: TS, for Metal or Wood Studs
  • Wiring System: Armored Cable/Metal Clad/MCI-A/Flex
  • Knockouts: 1/2 in
  • Certified Listed: UL Listed

Typical Applications

  • Junction and Outlet Box Installations
  • Residential and Commercial Wiring Systems
  • New Construction and Remodel Framing (Metal or Wood Studs)
  • Armored Cable, MC Cable, and Flexible Conduit Wiring
  • Ceiling and Wall Electrical Box Applications

Why RACO?

RACO electrical boxes are built from drawn steel for consistent strength and long-term durability in demanding installations. The RACO 155 combines a compact 4 in. octagon design with integrated AC/MC/Flex clamps and a TS mounting bracket for efficient, code-compliant installation. Backed by UL Listing, RACO products deliver the dependable performance trusted by electrical professionals on residential and commercial jobs.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
RACO-20260916
Product Type:
Ceiling Box
Product Size:
4 in
Product Depth:
1.5 in
Drawn or Welded:
Drawn
Bracket Type:
TS, for Metal or Wood Studs
Wiring System:
Armored Cable/Metal Clad/MCI-A/Flex
Knockouts:
1/2 in
Certified Listed:
UL Listed
Department:
Electrical
Product Subgroup:
Electrical Boxes
Product Group:
Boxes & Enclosures

RACO RACO155 – Frequently Asked Questions

1) Can I terminate MC cable directly into the RACO 155 octagon box without separate connectors?
Yes. The RACO 155 has integrated clamps rated for Armored Cable, Metal Clad, MCI-A and Flex, so AC, MC or flexible conduit lands straight in the box with no added cable connectors. If you are pulling NM (Romex) instead, this is the wrong box clamp type and you want an NM-clamp or clampless box with a separate connector.
2) Will the RACO 155 mount to metal studs or only wood framing?
Both. The 155 ships with a TS bracket made for metal or wood studs, so it works in steel-framed commercial partitions and in wood-framed residential work without changing hardware.
3) How deep is the RACO 155 4 in. octagon box, and is there room for several MC cables and a fixture whip?
It is a 4 in. octagon at 1-1/2 in. deep. That is the standard shallow-to-medium octagon depth, fine for a junction point or a ceiling fixture outlet with a few conductors, but if you are splicing multiple MC runs plus a device you should step up to a deeper box to stay inside box-fill limits.
4) Is the RACO 155 box UL Listed for commercial inspection?
Yes, the 155 is UL Listed, which is what an inspector looks for on a steel outlet or junction box in residential and commercial wiring.
5) Does the RACO 155 come with a cover?
No. The 155 is the box with its TS bracket and AC/MC/Flex clamps only. A 4 in. octagon blank, round or fixture-stud cover is ordered separately, and standard 4 in. octagon covers are the correct pattern for it.
6) Can I use the RACO 155 for an old-work retrofit in an existing finished ceiling?
Not well. The TS bracket is for attaching to a stud or joist during framing, which means new construction or an opened-up remodel. For an existing finished surface with no accessible framing you want an old-work or retrofit box with wing clips instead.
7) Is a drawn steel octagon box stronger than a welded one for a ceiling fixture?
Drawn construction means the 155 body is formed from a single piece of steel rather than welded from panels, so wall thickness is consistent and there are no seams to split. For ceiling outlet and junction use that is the construction most electricians prefer.
8) What is the exact RACO part number to order this 4 in. octagon box with clamps and bracket?
Order RACO 155. That single part number covers the 4 in. drawn steel octagon box, 1-1/2 in. deep, with the TS bracket and AC/MC/Flex clamps built in.
How fast can I get the RACO RACO155 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 RACO155 come with a warranty?
Absolutely. The RACO RACO155 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 RACO155?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the RACO RACO155 from ZenSupply?
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