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I would like to install this NEMA 14-30R in a surface mount single gang box for my dryer.

Can I put it into this box?

The box has 19 cu-in.

I am not proficient with fill calculations but 3x10AWG + 1x12AWG grounding I would arrive at 17.25 cu-in.

Hence I think it should be good but I want to confirm.

If not, do big stores like Lowe’s or Home Depot have a box that works?

Triplefault
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divB
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3 Answers3

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Will that box work? I guess it probably would. But use a metal box instead. See this post for some reasons why.

Typical is to use a 4" box and a cover such as this one from Home Depot:

cover

manassehkatz-Moving 2 Codidact
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The links you posted include dimensions, and based on those it doesn't seem like it would fit. The outer metal frame seems too big for the box.

  • Receptacle: 2.46" W x 3.69" H x 2.26" D (reference)
  • Box: 4.97" W x 2.3" H x 3.87" D (reference)

+1 to @manassehkatz's suggestion of using a 4" metal box. I've installed a similar sized receptacle before into such a box and it fit very naturally.

The bigger box will also give you more capacity inside to do the wiring. Assuming three #10 live conductors and one #12 ground, this calculator implies you'll need 17.25 cu in for box fill. In practice though that feels like it would be very tight, especially given how big the "device" is compared to a typical 15/20A receptacle, the amount of slack you'll need to leave, and any awkward angles for the wires to approach the device.

peter
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A frame challenge:

Your linked "Carlon" box is a surface mount box. What about replacing both box and insert with a surface-mount 14-30 outlet?

https://www.homedepot.com/p/ELEGRP-30-Amp-125-250V-NEMA-14-30R-Surface-Mount-Power-Outlet-Single-Straight-Blade-Range-Dryer-Outlet-Grounding-Black-2205/317611263

14-30 surface mount outlet

Triplefault
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