The Arlington 730B is a Brass 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 resources: Browse Arlington's official Grounding catalog ↗ for full technical specifications, dimensional drawings, and installation guides.
TL;DR
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What it is: Arlington 730B: rigid/IMC fitting in Brass, 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 730B: 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: 730B
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Family: Rigid IMC Fittings
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Finish / color: Brass
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Material: Brass
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Trade size: 1/2"
Best For
Common scopes where the Arlington 730B (and the rest of the Rigid IMC Fittings line) earns its place on the spec. It's not an exhaustive list, but 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. It's the same part number you've already spec'd on prior jobs, with the same listings.
- Replacement and add-on availability through a Canadian supply channel means 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. 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 of them 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
For contractors specifying the Arlington 730B on a project, Maple Electric Supply can confirm in-stock counts before you commit on the bid. That's useful when the install window is tight or the substitution clause in the spec is closed. Larger orders qualify for project pricing, and replacement SKUs ship from Ontario stock instead of waiting on a cross-border backorder.
Frequently Asked Questions
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Is the Arlington 730B 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 730B is a 1/2" trade-size fitting.
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Rigid (RMC) or IMC?
Varies by configuration. Check the 730B 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 730B 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 730B 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 730B 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.
Maple Electric Supply stocks rigid/IMC fittings in Ontario. Same-day shipping on in-stock SKUs, contractor pricing on volume orders.
