Extension ring for  4 In. Octagon Box, 2-1/8 in. Deep, 21 Cu. In., with Concentric, 1/2 & 3/4 in. KO (50-Pack)
Extension ring for  4 In. Octagon Box, 2-1/8 in. Deep, 21 Cu. In., with Concentric, 1/2 & 3/4 in. KO (50-Pack)
Hubbell

Hubbell 55171K Extension ring for 4 In. Octagon Box, 2-1/8 in. Deep, 21 Cu. In., with Concentric, 1/2 & 3/4 in. KO (50-Pack)

  • MPN: 55171K
  • UPC: 626463002254
  • PPN: HBL-55171K
  • UNSPSC: 39121308

CAD

$6.77

/ EA

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Spec sheet

Description

This extension ring is designed to enhance the functionality of a 4-inch octagon box, featuring a depth of 2-1/8 inches and a generous volume of 21 cubic inches for versatile wiring applications. Crafted from durable steel, it includes concentric knockouts for both 1/2 and 3/4 inch conduits, accommodating various installation needs. With its single gang configuration and CSA certification, you can be confident in its safety and compliance for your electrical projects. Supplied in a convenient 50-pack, this accessory is an essential component for ensuring secure and efficient electrical connections in residential or commercial settings.

Features

  • Absolutely. The Hubbell TradeSelect 55171K delivers an additional 21 cubic inches of interior volume, allowing you to easily accommodate extra conductor splices, large fixture leads, or deeper electrical devices. By adding a substantial 2-1/8 inches of extra depth to your existing system, it completely eliminates the intense labor and downtime associated with tearing out and replacing an overfilled box during a retrofit or renovation.
  • Designed as a direct fit for standard 4-inch octagon boxes, this single-gang extension ring mounts seamlessly onto your existing rough-in infrastructure. Its precise drawn-steel construction features self-tapping combination screw heads that virtually eliminate the risk of cross-threading or stripping during overhead ceiling and wall lighting fixture installations.
  • This steel extension ring provides maximum versatility on the job site by featuring two standard 1/2-inch knockouts on the side along with two 1/2-inch and 3/4-inch concentric combination knockouts on the ends. These dual-sized concentric KOs permit clean, direct conduit entries for multiple run configurations, ensuring you do not have to swap out components if your field routing plans change at the last minute.
  • Rest assured that your projects will remain fully up to code, as the Hubbell Canada 55171K is officially CSA Certified to meet rigorous industry standards for safety and performance. Built from rugged, durable steel with high structural integrity, this ring guarantees reliable grounding continuity and resilient physical protection inside commercial, institutional, and residential dry indoor environments.

Documentation & Downloads

Specifications

Additional

Size
4 in.
Volume
21 cu. in.
Material
Steel
Number of Gangs
1-Gang
Depth2-1/8 in.
Knockouts1/2 in, 3/4 in
Weight0.4 lb
ComplianceCSA Certified

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