The Arlington FS427SCL is a fan/fixture box built to give a fixture or device a flat, sealed, paintable mounting surface on lap or vinyl siding. Specified by builders, electricians, exterior contractors and stocked in Canada by Maple Electric Supply for fast contractor and project delivery.
Manufacturer resources: Browse Arlington's official Fan & Fixture Boxes catalog ↗ for full technical specifications, dimensional drawings, and installation guides.
TL;DR
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What it is: Arlington FS427SCL, fan/fixture box.
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Best for: ceiling fans (verify weight rating!), chandeliers.
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Why this one: Pre-formed J-channel integration and a weather-tight flange come built into the block, so there's no caulking gymnastics required.
Quick Specs
Quick reference for the FS427SCL. These are 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: FS427SCL
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Family: Fan and Fixture Boxes
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Sub-type: Light-fixture box
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Material: Steel
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Weight rating: 50 lbs
Best For
Common scopes where the Arlington FS427SCL (and the rest of the Fan and Fixture Boxes line) earns its place on the spec. 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.
- Ceiling fans (verify weight rating!)
- Chandeliers
- Bathroom exhaust fixtures
- Sloped-ceiling pendants
Why Contractors Choose It
- Listed for the applications stated on the Arlington spec sheet, so there are no jurisdictional surprises at inspection.
- Weight-rated boxes with the bracket geometry land on standard joist spacing, with no field-fabricated supports and no warranty conversations later.
- 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 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 fan and fixture boxes:
See: Arlington Fan and Fixture Boxes collection
Installation Notes
- Ceiling fan boxes must be rated for the fan weight per CEC Section 30. Fire-rated assemblies require fire-rated boxes per local code.
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Primary code reference: CEC Section 30 (Lighting Installations); CEC 12-3000 (Boxes and Fittings).
- 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 Fan and Fixture Boxes line. Most of them are small and avoidable when the right SKU and accessory get pulled at the counter.
- Using a fixture-rated box for a fan (weight failure)
- Skipping fire-rated boxes in a fire-rated assembly
- Forgetting the joist-hanger model for new construction
- Sealing without checking vapor-barrier compatibility
Frequently Bought With
- Arlington Specialty Boxes (box extenders)
- Arlington NM Cable Fittings
- Arlington Conduit Bodies
Sourcing in Ontario
For contractors specifying the Arlington FS427SCL on a project, Maple Electric Supply can confirm in-stock counts before you commit on the bid. That matters 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 FS427SCL 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's the fan weight rating?
Varies by configuration. Check the FS427SCL 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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New construction or retrofit (cut-in)?
The FS427SCL 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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Fire-rated assembly compatible?
Confirm against the published Arlington FS427SCL 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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Air-tight / vapor barrier rated?
Maple Electric Supply can pull the FS427SCL spec sheet on request. The answer depends 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.
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Stud-mount, joist-mount, or pan-style?
Refer to the FS427SCL product page on Arlington's site or contact Maple Electric Supply for a copy of the current spec sheet with all listed ratings. Generic family-level guidance is a starting point, but the SKU-level sheet is what the inspector will reference.
Stocked in Canada by Maple Electric Supply. Contractor support, bulk pricing on request, local pickup and delivery available.
