Mulberry 30333 Powdered Die-Ca...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$14.69
Mulberry 30333 Powdered Die-Cast Aluminum Box Extension, 4-Inch x 1-1/2-Inch

Mulberry 30333 Powdered Die-Cast Aluminum Box Extension, 4-Inch x 1-1/2-Inch

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Model: 30333

In Stock (leaves warehouse same day if ordered before 3pm ET)

$14.69
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Mulberry 30333 Powdered Die-Cast Aluminum Box Extension, 4-Inch x 1-1/2-Inch

The Mulberry 30333 Box Extension is a powdered die-cast aluminum extension ring designed to add extra depth and volume to existing electrical boxes. When device wiring, splices, or additional conductors leave a standard box too shallow for code-compliant fill, this extension mounts to the existing enclosure to increase usable space without requiring a full box replacement. Measuring 4-Inch x 1-1/2-Inch, the Mulberry 30333 adds 15.3-Cubic-Inch of interior capacity, giving installers extra room to work while keeping the original box in place. Constructed from rugged powdered die-cast aluminum, this extension is built to withstand the wear and tear of everyday job-site installation, whether in new construction or renovation work.

Key Features

  • Trade Size: 4-Inch x 1-1/2-Inch dimensions provide the added depth needed to bring a shallow electrical box up to code-compliant volume.
  • Volume Capacity: 15.3-Cubic-Inch of additional interior space accommodates extra wiring, devices, and conductor fill.
  • Durable Construction: Powdered die-cast aluminum body offers corrosion resistance and long-term durability for demanding installation environments.
  • Box Extension Function: Mounts directly to existing electrical boxes, extending usable depth without the cost or labor of a full box replacement.
  • Lightweight Aluminum Build: Die-cast aluminum construction keeps the extension lightweight for easier handling while maintaining structural strength.
  • Versatile Fit: Compatible with standard electrical box configurations that require added depth for device or wiring clearance.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Electrical Box Depth and Volume Extension
  • Commercial and Industrial Electrical Installations
  • Junction Box and Device Box Modifications
  • New Construction and Renovation Projects
  • Conduit Routing and Wiring Device Clearance
  • Panel and Enclosure Volume Adjustments

Why Mulberry?

Mulberry's 30333 Box Extension is manufactured from powdered die-cast aluminum, giving it the strength and corrosion resistance electrical professionals expect from a component that stays in the wall or panel for the life of the installation. With 4-Inch x 1-1/2-Inch dimensions and 15.3-Cubic-Inch of added interior capacity, it provides a practical, straightforward way to bring an existing electrical box into compliance without a full replacement. Choose Mulberry for electrical box accessories built to perform reliably on demanding commercial and industrial job sites.

Manufacturer Resources

Mulberry Full Line Catalog

Product Specs

list_batch:
MUL-20260919
Product Type:
Box Extension
Product Finish:
Powder-Coated
Department:
Electrical
Product Subgroup:
Enclosure Accessories
Product Material:
Die-Cast Aluminum
Product Group:
Boxes & Enclosures

Mulberry 30333 – Frequently Asked Questions

1) Will the Mulberry 30333 box extension fit a standard 4-inch square electrical box?
The Mulberry 30333 is a 4-inch x 1-1/2-inch extension ring, so it mounts to 4-inch electrical boxes of that footprint and adds 1-1/2 inches of depth. It fastens to the existing enclosure rather than replacing it, so the original box, conduit, and cable entries all stay put.
2) How much box fill volume does a 30333 extension ring add for conductor count calculations?
It adds 15.3 cubic inches of interior volume. That is the number you add to the existing box volume when you run your fill calculation, which is usually what gets a shallow device box back into compliance after extra conductors, splices, or a larger device went in.
3) Is a box extension or a complete box replacement the right fix for a box that is too shallow?
If the existing box is sound and in the right place, the extension is the lower-labor route: the 30333 bolts onto the enclosure, adds 15.3 cubic inches, and leaves the wiring and conduit undisturbed. Replace the box instead when the box itself is damaged, mislocated, or when you need the device face to sit flush with a finished surface the extension would push it past, since the ring projects 1-1/2 inches.
4) What is the Mulberry part number for the 4-inch by 1-1/2-inch aluminum box extension?
Order it as Mulberry 30333. That single model number covers the 4-inch x 1-1/2-inch powder-coated die-cast aluminum extension, so there is no finish or depth suffix to specify.
5) Does a box extension go on before or behind the device, and does it change how the wiring device mounts?
The extension stacks on the front of the existing box, and the wiring device then mounts to the extension rather than the original box. That is the point of it: the device and its conductors sit in the added 15.3 cubic inches of space instead of being crammed against the splices behind them. Account for the 1-1/2 inches of added depth when you set your finish wall or cover plate.
6) Will a die-cast aluminum box extension hold up in a damp or corrosive area?
The 30333 body is die-cast aluminum with a powder-coated finish, which is the combination electricians use where steel would start rusting, such as parking structures, mechanical rooms, and exterior walls. Aluminum also keeps the ring light enough to hold one-handed while you start the screws.
How fast can I get the Mulberry 30333 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Mulberry 30333 come with a warranty?
Absolutely. The Mulberry 30333 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Mulberry 30333?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Mulberry 30333 from ZenSupply?
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