The Arlington RTS402 is a mast component built to solve a niche install requirement, such as cable support, conduit sleeve, low-voltage management, or a finishing component. Specified by electricians, builders, AV installers and stocked in Canada by Maple Electric Supply for fast contractor and project delivery.
Manufacturer resources: Browse Arlington's official Specialty Boxes catalog ↗ for full technical specifications, dimensional drawings, and installation guides.
TL;DR
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What it is: Arlington RTS402, mast component, 947/8" trade size.
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Best for: new service mast installs, service riser replacements.
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Why this one: Arlington's deep catalog of small accessories that finish a job cleanly.
Quick Specs
Quick reference for the RTS402. 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: RTS402
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Family: Mast Parts
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Trade size: 947/8"
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Weight rating: 2000 lbs
Best For
Common scopes where the Arlington RTS402 (and the rest of the Mast Parts 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.
- New service mast installs
- Service riser replacements
- Manufactured-home services
- Pole-top utility taps
Why Contractors Choose It
- Listed for the applications stated on the Arlington spec sheet, with no jurisdictional surprises at inspection.
- Service-mast geometry and fastener detail that satisfies the local utility's connection standard, not just the bonding inspector.
- 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 mast components:
See: Arlington Mast Parts collection
Installation Notes
- Service mast assemblies must comply with utility supply authority requirements and CEC 6-112. Mast height and bracing per local utility standards.
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Primary code reference: CEC Section 6-112 (Service Equipment); CEC 26-700 (Outdoor).
- 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 Mast Parts line, most of them small and all of them avoidable when the right SKU and accessory get pulled at the counter.
- Skipping utility approval before install
- Using residential mast on commercial amperage
- Forgetting the weatherhead at the top
- Not bonding the mast per CEC 10
Frequently Bought With
- Arlington Rigid IMC Fittings
- Arlington Conduit Bodies
- Arlington Grounding
Sourcing in Ontario
For contractors specifying the Arlington RTS402 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 RTS402 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 service amperage does this support (100A, 200A)?
Varies by configuration. Check the RTS402 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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Conduit trade size?
The RTS402 is a 947/8" trade-size fitting.
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Galvanized steel or aluminum?
The RTS402 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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Includes weatherhead, straps, and entrance components?
Confirm against the published Arlington RTS402 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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Utility-approved for service entrance use?
Maple Electric Supply can pull the RTS402 spec sheet on request. Answers here depend 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.
