Mulberry 30278 Anodized Alumin...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2.36
Mulberry 30278 Anodized Aluminum 1-Gang Weatherproof Blank Wallplate

Mulberry 30278 Anodized Aluminum 1-Gang Weatherproof Blank Wallplate

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Model: 30278Z
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$2.36
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Mulberry 30278 Anodized Aluminum 1-Gang Weatherproof Blank Wallplate

The Mulberry 30278 is a 1-Gang weatherproof flat blank cover engineered from anodized aluminum to seal unused device openings in outdoor and wet-location electrical boxes. Its low-profile, flat design mounts flush to standard single-gang weatherproof enclosures, keeping moisture, dust, and debris out of the box while providing a clean, finished appearance on any exterior wall. With no device cutout, it is ideal for capping spare knockouts or openings that are not currently in use. This anodized aluminum blank wallplate is available in Bronze, Gray, and White finishes, giving contractors a matching weatherproof cover option for any exterior color scheme.

Key Features

  • 1-Gang Configuration: Sized to fit standard single-gang weatherproof electrical boxes and enclosures.
  • Durable Construction: Anodized aluminum body resists corrosion, pitting, and weathering for long-term outdoor performance.
  • Blank Cover Design: Solid, cutout-free plate seals unused or spare device openings against moisture and debris.
  • Weatherproof Protection: Engineered for reliable performance in outdoor and wet-location electrical installations.
  • Flat, Low-Profile Finish: Flush-mount styling provides a clean, finished look on any weatherproof box.
  • Finish Options: Available in Bronze, Gray, and White anodized finishes to match a range of exterior color schemes.
  • Low-Maintenance Finish: The anodized surface resists fading and staining, holding its appearance with minimal upkeep in exterior environments.

Certifications & Compliance

  • Weatherproof Rated for Outdoor and Wet-Location Use

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Outdoor and Wet-Location Electrical Installations – sealing device boxes against the elements.
  • Weatherproof Device Box Covers – capping single-gang enclosures on exterior walls.
  • Sealing Unused or Spare Device Openings – closing off knockouts with no active device.
  • Exterior Residential and Commercial Wiring – patios, entryways, and utility areas.
  • Renovation and New Construction Weatherproof Coverage – finishing exterior boxes to code.
  • Retrofit Applications – replacing damaged or missing weatherproof blank covers.

Why Mulberry?

Mulberry builds electrical wiring devices and covers for demanding outdoor and commercial environments. The anodized aluminum construction of the 30278 delivers corrosion resistance and durability across its Bronze, Gray, and White finish options, making it a reliable choice for professionals who need dependable weatherproof coverage over time. The flat, blank profile keeps installations simple, giving contractors a straightforward way to seal unused openings without compromising the weatherproof integrity of the enclosure.

Manufacturer Resources

Mulberry Full Line Catalog

Product Specs

Product Group:
Wiring Devices
Configuration:
1-Gang
Department:
Electrical
Product Type:
Wallplate
Product Material:
Anodized Aluminum
Product Subgroup:
Wallplates

Mulberry 30278Z – Frequently Asked Questions

1) Will the Mulberry 30278 blank cover fit a standard single-gang weatherproof box?
Yes. The Mulberry 30278 is a 1-gang flat blank cover sized for standard single-gang weatherproof boxes and enclosures. It mounts flush to the box face. If your enclosure is a two-gang body, this plate will not cover it.
2) Can a blank weatherproof cover be used outdoors in a wet location?
The Mulberry 30278 is built for outdoor and wet-location electrical installations. It is a solid plate with no device cutout, so it seals the opening against moisture, dust, and debris on exterior boxes at patios, entryways, and utility areas.
3) I need to cap an unused outdoor box opening. Is a blank plate the right part, or do I need a while-in-use cover?
If there is no device in the box and none planned, a blank is what you want. The Mulberry 30278 has no cutout at all, so it closes off spare or unused device openings and keeps the enclosure sealed. A while-in-use or flip-lid cover is only needed when a receptacle or switch is actually installed and has to stay accessible.
4) If the box has a toggle switch in it instead of being empty, what plate replaces the Mulberry 30278?
The Mulberry 30278 is a blank, cutout-free cover, so it will not work over an active device. For a single-gang toggle switch opening, the Pass & Seymour TP1LA TradeMaster 1-Gang Toggle Switch Wall Plate is a nylon plate with a toggle cutout, and the TP1RED is the same TradeMaster toggle plate in red. Both are switch plates rather than weatherproof blanks, so keep them to dry interior locations and stay with the 30278 anodized aluminum blank where the box is outdoors or in a wet location.
5) What do I use if the outdoor box has a duplex receptacle rather than a blank?
The Mulberry 30278 has no device cutout at all, so it only suits openings with nothing in them. Where a duplex receptacle is present, the Bryant P8 Series 1-Gang Duplex Wallplate is a single-gang plate cut for a duplex device. The 30278 remains the anodized aluminum weatherproof blank for capping unused single-gang exterior openings.
6) What colors does the Mulberry 30278 weatherproof blank plate come in, and what are the part numbers?
Three anodized finishes. Gray is part number 30278, White is 30278W, and Bronze is 30278Z. Ordering by the suffix is the safest way to get the right color on a jobsite where the exterior trim has to match.
7) Is an aluminum blank cover better than plastic for a coastal or exposed exterior wall?
The 30278 body is anodized aluminum, which resists corrosion, pitting, and weathering, and the anodized surface resists fading and staining with minimal upkeep. That is the reason to spec it over a thermoplastic blank on walls that take direct sun and driven rain.
8) Can the Mulberry 30278 replace a damaged or missing weatherproof blank cover on an existing box?
That is one of its intended uses. The 30278 is a flat, low-profile blank for retrofit on existing single-gang weatherproof enclosures as well as new construction, so a cracked or missing exterior blank can be swapped out without changing the box.
9) Is the Bryant NP26W a substitute for the Mulberry 30278?
Both are single-gang wallplates. The Bryant NP26W is an HWS Series P26W 1-gang plate; the Mulberry 30278 is an anodized aluminum blank with no cutout, offered in Bronze, Gray, and White for outdoor and wet-location boxes. If the requirement is specifically a blank anodized aluminum cover for an exterior enclosure, order the 30278 and its color variants (30278 Gray, 30278W White, 30278Z Bronze) rather than cross-shopping by gang count alone.
10) I need to cover a two-gang exterior opening - does the Mulberry 30278 stack or is there a wider plate?
The Mulberry 30278 is a 1-Gang configuration and does not cover a two-gang box. For a two-gang opening, the Pass & Seymour Trademaster Two-Gang Combination Wallplate in nylon spans two gangs, though it is a combination plate with device cutouts rather than a blank. Use the 30278 only on single-gang weatherproof enclosures.
11) What is the difference between the Mulberry 30278 and a thermoset or nylon plate like the Pass & Seymour SPJ?
Material and coverage. The Mulberry 30278 is anodized aluminum, which resists corrosion, pitting, and fading outdoors, and it is a solid blank with no opening. The Pass & Seymour SPJ Series is a junior-jumbo thermoset plate with a toggle switch opening, so it both accepts a device and uses a molded rather than metal body. For exterior walls, entryways, and utility areas where the box is empty, the 30278 is the anodized aluminum blank.
12) Will a flat blank cover stick out from the wall?
No. The 30278 is a flat, low-profile plate that mounts flush to the weatherproof box, so it sits tight to the enclosure rather than projecting like a lift-lid or bubble cover.
13) Can I use a data jack plate on the exterior box instead of the Mulberry 30278?
Only if the box is terminating low-voltage cable. The Eaton 35324W wallplate carries a 4-conductor Type 625B4 data/voice modular jack, so it is a communications plate, not a seal. The Mulberry 30278 has no cutout and is built to keep moisture, dust, and debris out of an unused single-gang weatherproof box, which is the job on a spare or capped exterior opening.
14) For a mid-size device on an interior wall, is there an alternative to the Mulberry 30278 blank?
Yes. The Bryant PJ Series is an M-size wallplate for wiring devices, sized for the device rather than blank. The Mulberry 30278 is a flat, low-profile blank in anodized aluminum intended for flush mounting on single-gang weatherproof enclosures, so pick the PJ when a device is present and the 30278 when the opening is to be sealed.
How fast can I get the Mulberry 30278Z 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 30278Z come with a warranty?
Absolutely. The Mulberry 30278Z 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 30278Z?
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 30278Z from ZenSupply?
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