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US duplex receptacle wall plate: opening numbers
What size is the opening in a US duplex receptacle wall plate? · Standard part · basis: Arrow Hart / Hubbell Wallplate Dimensional Information (J-2); the opening drawing could not be read, so numbers only
Also called: duplex outlet cover dimensions, duplex receptacle plate opening size, outlet plate size
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 3 in table
Notes
- The catalog prints three duplex opening numbers: 0.76 in (19.4 mm), 1.31 in (33.3 mm) and 2.65 in (67.4 mm). The text of the page does not say which number belongs to which part of the outline, so Xem publishes no file: guessing the outline would break the true-size rule.
- A retailer describes the opening as 1-1/8 in high by 1-11/32 in wide at the widest point of each half, with flat tops and bottoms. That differs from the catalog, so measure your own plate before designing a cover.
- Plate outlines, gang spacing and screw spacing are the same as on the toggle and Decora plate pages. Duplex plates use one centre screw into the receptacle.
- Plate thickness, edge radii and bevel are not published.
US duplex receptacle wall plate: opening numbers size chart
| parameter | value |
|---|---|
| opening numbers as printed | 0.76 in (19.4 mm), 1.31 in (33.3 mm), 2.65 in (67.4 mm) |
| outline, gang spacing | see the toggle plate page |
| device mounting-strap hole spacing, box ears | 3-9/32 in (83.3 mm) |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Arrow Hart / Hubbell Wiring (via Elliott Electric) | Wallplate Dimensional Information, catalog pages J-2 and J-3 | web | Publisher's page; dimensions are facts |
| Kyle Switch Plates | Screw hole spacing on electrical wall plate covers | web | Publisher's page; dimensions are facts |
Xem scan
File coming
No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=wall-plate-duplex-us
Questions
How wide is a duplex outlet plate opening?
The catalog prints 2.65 in (67.4 mm) overall, 1.31 in (33.3 mm) and 0.76 in (19.4 mm) without saying which feature is which.