The Arlington L4210 is an MC/AC cable connector built to terminate armoured or metal-clad cable into a box, panel, or enclosure code-compliantly. Specified by electricians, residential and commercial and stocked in Canada by Maple Electric Supply for fast contractor and project delivery.
Manufacturer resources: Browse Arlington's official Flex, AC & MC Fittings catalog ↗ for full technical specifications, dimensional drawings, and installation guides.
TL;DR
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What it is: Arlington L4210, an MC/AC cable connector, 4" trade size.
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Best for: mc cable terminations in commercial, ac90 in residential.
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Why this one: Arlington Snap2It snap-in connectors install in seconds without screws or tools.
Quick Specs
Quick reference for the L4210: 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: L4210
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Family: Flex AC MC Fittings
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Material: Zinc Die-Cast
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Trade size: 4"
Best For
Common scopes where the Arlington L4210 (and the rest of the Flex AC MC Fittings line) earns its place on the spec. It's not an exhaustive list, just a fast read on whether this is the right family for your application before you go deeper on the cut sheet.
- MC cable terminations in commercial
- AC90 in residential
- Flex whips to motors
- Industrial machine-tool feeds
Why Contractors Choose It
- Listed for the applications stated on the Arlington spec sheet, so there are no jurisdictional surprises at inspection.
- Snap-on and lock-style options that meet the CEC bonding requirement at the fitting without a separate ground-bushing SKU.
- 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 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 MC/AC cable connectors:
See: Arlington Flex AC MC Fittings collection
Installation Notes
- MC and AC cable connectors must be listed for the cable type. Anti-short bushings required on metal-clad cable per CEC 12-1116.
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Primary code reference: CEC Section 12-1000 (Armoured Cable AC90/ACWU90); CEC 12-1100 (MC Cable).
- 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 Flex AC MC Fittings line. Most are small, and all are avoidable when the right SKU and accessory get pulled at the counter.
- Skipping the anti-short bushing (CEC 12-1116 violation)
- Using AC connector on MC cable (different listings)
- Over-tightening the saddle screw (cuts the jacket)
- Mixing Snap2It and traditional locknut connectors on the same run
Frequently Bought With
- Arlington NM Cable Fittings (anti-short)
- Arlington Grounding
- Arlington EMT Fittings
Sourcing in Ontario
The Arlington L4210 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 MC/AC cable connector reaches the job without customs paperwork on your end.
Frequently Asked Questions
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Is the Arlington L4210 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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What cable type does this connect (AC90, MC, ACWU90, flex)?
Varies by configuration. Check the L4210 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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Trade size?
The L4210 is a 4" trade-size fitting.
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Does it require an anti-short bushing (and is one included)?
The L4210 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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Snap-in (Snap2It), screw-in, or saddle style?
Confirm against the published Arlington L4210 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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Is the body insulated at the throat?
Maple Electric Supply can pull the L4210 spec sheet on request. The answer depends on the specific configuration and the listed conditions of use. Anything that affects code compliance should come straight from the manufacturer's current published documentation.
Stocked in Canada by Maple Electric Supply. Contractor support, bulk pricing on request, local pickup and delivery available.
