The Arlington 505 is a rigid/IMC fitting built to thread, terminate, and adapt rigid metal or IMC conduit runs. Specified by industrial electricians, service-entrance installers and stocked in Canada by Maple Electric Supply for fast contractor and project delivery.
Manufacturer spec sheet: Download the official Arlington spec sheet (PDF) ↗
TL;DR
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What it is: Arlington 505: rigid/IMC fitting, 1-1/2" trade size.
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Best for: service entrance runs, outdoor exposed conduit.
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Why this one: Heavy zinc and aluminum bodies built for the toughest commercial and industrial duty.
Quick Specs
Quick reference for the 505, covering the points contractors and purchasers check first when matching a part to a project drawing or a takeoff line. Full installation and listing detail lives on the Arlington spec sheet.
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Arlington part number: 505
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Family: Rigid IMC Fittings
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Material: Zinc Die-Cast
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Trade size: 1-1/2"
Best For
Common scopes where the Arlington 505 (and the rest of the Rigid IMC Fittings line) earns its place on the spec. It's not an exhaustive list, but it's a fast read on whether this is the right family for your application before you go deeper on the cut sheet.
- Service entrance runs
- Outdoor exposed conduit
- Heavy industrial
- Mast-to-meter feeds
Why Contractors Choose It
- Listed for the applications stated on the Arlington spec sheet, so there are no jurisdictional surprises at inspection.
- Threaded into the same NPT spec the conduit was reamed to, with bonding paths that hold up to service-entrance amperage.
- Distributed by a Canadian-owned stocking dealer. Maple Electric Supply ships from Ontario, so the SKU lands on site without cross-border duty calcs or week-long customs holds.
- Backed by Arlington's North American manufacturing footprint: the same part number you've already spec'd on prior jobs, with the same listings.
- Replacement and add-on availability runs through a Canadian supply channel, so short-notice job sites can pull additional units without re-engineering the order.
Choose the Right Model
Compare with sibling Arlington rigid/IMC fittings:
See: Arlington Rigid IMC Fittings collection
Installation Notes
- Rigid metal conduit fittings must be threaded and listed. Reducing washers must match conduit size per CEC 12-1106.
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Primary code reference: CEC Section 12-1100 (Rigid Metal Conduit); CEC 12-1106 (Couplings and Connectors).
- Verify the Arlington listing on the current spec sheet matches your local AHJ's adopted code edition, since provincial amendments to the CEC can override the federal base text.
- Confirm trade size, mounting style, and accessory pairing against the project drawings before ordering in volume. Maple Electric Supply's counter staff can pull the cut sheet on request.
- Installation must be completed by a qualified electrician where required by local code; the homeowner / unlicensed scope is narrower in Ontario than in several US jurisdictions.
Common Mistakes to Avoid
Patterns we see on returns, callbacks, and inspection re-visits around the Rigid IMC Fittings line. Most are small and avoidable when the right SKU and accessory get pulled at the counter.
- Using EMT fittings on rigid (different thread)
- Skipping the reducing washer at panel knockouts
- Forgetting the entrance cap on the weather-side
- Not bonding through the threaded connection
Frequently Bought With
- Arlington EMT Fittings
- Arlington Mast Parts
- Arlington Conduit Bodies
Sourcing in Ontario
The Arlington 505 is part of Maple Electric Supply's stocking program. Orders for in-stock SKUs ship same-day from our Ontario warehouse. Larger project quantities can be quoted with contractor pricing; we pull from Arlington's North American inventory pool directly, not through a US re-shipper, so the rigid/IMC fitting reaches the job without customs paperwork on your end.
Frequently Asked Questions
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Is the Arlington 505 UL and/or CSA listed?
Arlington components are listed for the applications stated by the manufacturer. Always verify the listing on the product's spec sheet against your jurisdiction's adopted code.
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Is this part made in the USA?
Arlington Industries manufactures the bulk of its catalog in the United States. Confirm origin on the current spec sheet if it matters for your project.
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Trade size?
The 505 is a 1-1/2" trade-size fitting.
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Rigid (RMC) or IMC?
This varies by configuration, so check the 505 datasheet for the exact dimensions, ratings, and accessory list before ordering in volume. Arlington updates spec sheets periodically, so spec the live version from the manufacturer's site for the current job.
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Reducing washer or full fitting?
The 505 datasheet is the authoritative source on this. Arlington publishes torque specs, listed conductor ranges, and accepted accessories per part number, and those values shift between revisions even when the SKU stays the same.
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Material: zinc, steel, or aluminum?
Confirm against the published Arlington 505 cut sheet; values shift between configurations even inside the same family. Maple Electric Supply can email a current copy on request and flag any recent revisions that changed listed ratings.
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Listed for grounding?
Maple Electric Supply can pull the 505 spec sheet on request. Answers here depend on the specific configuration and the listed conditions of use, and anything that affects code compliance should come straight from the manufacturer's current published documentation.
Buy Arlington rigid/IMC fittings from a Canadian distributor. Maple Electric Supply ships from Ontario stock; technical support included.
