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Electrical Boxes

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SKU 158950

Weatherproof Box Extension Ring 2-Gang Metallic Gray

Original price $14.93 - Original price $14.93
Original price
$14.93
$14.93 - $14.93
Current price $14.93
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About This Product Weatherproof extension rings are intended for use in branch circuit wiring in wet, damp, or dry environments. These extension ri...

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SKU 696471

Weatherproof Flat Cover Clear 2-Gang Horizontal/Vertical Non-Metallic (73-in-1-Configurations)

Original price $13.78 - Original price $13.78
Original price
$13.78
$13.78 - $13.78
Current price $13.78
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About This Product Weatherproof nonmetallic flat device covers offer protection for a 2-Gang box in any weather. These flat covers are crafted from...

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SKU 505382

Weatherproof Receptacle Cover 2-Gang Extra Duty Non-Metallic Low Profile While-In-Use Horizontal/Vertical Clear

Original price $30.65 - Original price $30.65
Original price
$30.65
$30.65 - $30.65
Current price $30.65
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About This Product Low-profile, non-metallic while-in-use device covers offer weatherproof protection for active outlets. These covers are construc...

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SKU 922729

Weatherproof In-Use Cover 2-Gang Extra Duty Metallic Gray (73-in-1-Configurations)

Original price $36.20 - Original price $36.20
Original price
$36.20
$36.20 - $36.20
Current price $36.20
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About This Product While-in-use device covers offer weatherproof protection when an outlet is actively in use. These while-in-use covers are constr...

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SKU 554748

Weatherproof In-Use Cover 2-Gang Extra Duty Horizontal/Vertical Non-Metallic Gray (73-in-1-Configurations)

Original price $22.20 - Original price $22.20
Original price
$22.20
$22.20 - $22.20
Current price $22.20
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About This Product The non-metallic while-in-use device covers offer weatherproof protection for outlets in use. These covers are constructed from ...

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SKU 495684

Weatherproof In-Use Cover 2-Gang Extra Duty Horizontal/Vertical Non-Metallic Clear (73-in-1-Configurations)

Original price $31.37 - Original price $31.37
Original price
$31.37
$31.37 - $31.37
Current price $31.37
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About This Product The non-metallic while-in-use device covers offer weather-resistant protection when an outlet is actively being used. These whil...

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SKU 668797

Weatherproof Box 2-Gang Deep Metallic with (5) 1 in. Holes, Gray

Original price $23.92 - Original price $23.92
Original price
$23.92
$23.92 - $23.92
Current price $23.92
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About This Product Weatherproof enclosures are intended for branch circuit wiring in wet, damp, or dry environments. These boxes accommodate recept...

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SKU 187864

Weatherproof Cover 2-Gang Blank Metallic Gray

Original price $5.12 - Original price $5.12
Original price
$5.12
$5.12 - $5.12
Current price $5.12
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About This Product Blank covers are crafted to offer weatherproof shielding when a box serves as a junction. These blank covers attach flat to the ...

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SKU 844968

ENT Box 2-Gang 5/8 in. Mud Ring PVC

Original price $3.27 - Original price $3.27
Original price
$3.27
$3.27 - $3.27
Current price $3.27
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About This Product The 2-Gang box extender is crafted for 2-Gang device installations. Constructed from thermoplastic PVC for longevity, it resists...

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SKU 170350

Electrical Box Cover Blank PVC 2-Gang 4 in.

Original price $3.22 - Original price $3.22
Original price
$3.22
$3.22 - $3.22
Current price $3.22
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About This Product The 2-Gang blank box cover is perfect for concealing boxes for potential future use. Constructed from sturdy PVC, this blank cov...

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SKU 314891

Metal Square Mud Ring 2-Gang 4 in. 4.3 cu. in. Pre-Galvanized - 5/8 in. Raised

Original price $2.91 - Original price $2.91
Original price
$2.91
$2.91 - $2.91
Current price $2.91
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About This Product The 2-Gang Square Mud Ring installs on top of 4-inch square electrical boxes to align with the surface. This item is raised by 5...

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SKU 086307

Electrical Box PVC New Work 2-Gang 38 cu. in. ENT

Original price $10.33 - Original price $10.33
Original price
$10.33
$10.33 - $10.33
Current price $10.33
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About This Product The Combination 2-Gang box/four square is crafted for use with electrical non-metallic tubing. The 38 cu. in. box accommodates t...

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SKU 113834

Electrical Switch and Outlet Box 2-Gang 35 cu. in. New Work Hard Shell PVC

Original price $5.73 - Original price $5.73
Original price
$5.73
$5.73 - $5.73
Current price $5.73
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About This Product The 2-Gang 35 cu. in. Non-Metallic Hard-Shell Switch and Outlet Box is engineered to withstand breaking or cracking, even under ...

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SKU 200533

Electrical Box PVC New Work 2-Gang with Adjustable Bracket 34 cu. in.

Original price $11.48 - Original price $11.48
Original price
$11.48
$11.48 - $11.48
Current price $11.48
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About This Product The 34 cubic inch PVC 2-Gang Wall Box Adjust-a-box with Adjustable Bracket for Vertical Mount is built to permit depth adjustmen...

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SKU 123564

Electrical Switch and Outlet Box 2-Gang 34 cu. in. Old Work Hard Shell PVC

Original price $10.78 - Original price $10.78
Original price
$10.78
$10.78 - $10.78
Current price $10.78
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About This Product The Super Blue Old Work 2-Gang 34 cu. in. Non-Metallic Hard-Shell Switch and Outlet Box is built to withstand breaking or cracki...

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SKU 600251

Electrical Switch and Outlet Box 2-Gang 32 cu. in. PVC New Work

Original price $7.47 - Original price $7.47
Original price
$7.47
$7.47 - $7.47
Current price $7.47
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About This Product The 2-Gang 34 cu. in. Non-Metallic Switch and Outlet Box is crafted for use with non-metallic sheathed cable following article 3...

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SKU 374081

Electrical Box PVC New Work 2-Gang with Bracket 32 cu. in.

Original price $5.04 - Original price $5.04
Original price
$5.04
$5.04 - $5.04
Current price $5.04
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About This Product The 2-Gang 32 cu. in. Non-Metallic Switch and Outlet Box is crafted for use with non-metallic sheathed cable, adhering to Articl...

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SKU 107856

Electrical Switch and Outlet Box 2-Gang Blue PVC New Work 32 cu. in.

Original price $2.84 - Original price $2.84
Original price
$2.84
$2.84 - $2.84
Current price $2.84
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About This Product The Zip Box 2-Gang 32 cu. in. Non-Metallic Switch and Outlet Box is crafted for use with non-metallic sheathed cables, adhering ...

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SKU 732670

Electrical Switch and Outlet Box 2-Gang 25 cu. in. PVC Old Work

Original price $6.42 - Original price $6.42
Original price
$6.42
$6.42 - $6.42
Current price $6.42
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About This Product The Zip Box 2-Gang 25 cu. in. Old Work Non-Metallic Switch and Outlet Box is intended for use with non-metallic sheathed cable, ...

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SKU 221374

Wall Box 2-Gang 21 cu. in. Square

Original price $3.22 - Original price $3.22
Original price
$3.22
$3.22 - $3.22
Current price $3.22
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About This Product The 2-Gang 21 cu. in. Square Wall Box features 17 knockouts on all its sides and bottom for connecting metal conduits. This wall...

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SKU 674681

Electrical Switch and Outlet Box 2-Gang 18 cu. in. PVC New Work

Original price $5.73 - Original price $5.73
Original price
$5.73
$5.73 - $5.73
Current price $5.73
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About This Product The 2-Gang 18 cu. in. Non-Metallic Switch and Outlet Box is intended for use with non-metallic sheathed cable, following the gui...

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SKU 970944

PVC ENT Box 2-Gang 1/2 in. Mud Ring

Original price $2.97 - Original price $2.97
Original price
$2.97
$2.97 - $2.97
Current price $2.97
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About This Product The 2-Gang box extender is compatible with various wallboard thicknesses. It is designed for use with a 2-Gang device. Made from...

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SKU 844252

Electrical Ceiling Box PVC New Work 18 cu. in.

Original price $4.45 - Original price $4.45
Original price
$4.45
$4.45 - $4.45
Current price $4.45
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About This Product The 1-Gang 18 cu. in. Non-Metallic Ceiling Box is intended for use with non-metallic sheathed cable, following article 314 of th...

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SKU 975452

Ceiling Box PVC 18 cu. in.

Original price $4.58 - Original price $4.58
Original price
$4.58
$4.58 - $4.58
Current price $4.58
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About This Product Install dependable new electrical ceiling boxes quickly and easily with our electrical ceiling box equipped with clamps and wire...

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Electrical Boxes: What You Need to Know

Electrical boxes, also referred to as conduit fittings or enclosures, are essential components for securing and routing electrical wiring in both indoor and outdoor environments. Available in waterproof options, these boxes are designed to resist moisture ingress and protect internal wiring from rain, splashes, or damp conditions, ensuring long-term safety and performance. Sizes range from ¼ inch to 12 inches, and shapes include both round and square formats to match various mounting requirements.

Type:

  • Boxes & Brackets: Used to house electrical connections and support wiring infrastructure. They offer stability and protection for both conduit and wiring assemblies in walls and ceilings.
  • Covers: Designed to seal conduit openings and protect internal wiring from dust and moisture. They are essential for safety, insulation, and code compliance in open junctions.
  • Weatherproof Boxes: Built to endure moisture, dirt, and corrosion in outdoor and damp locations. They are commonly used in exposed electrical systems, especially in residential and light commercial construction.

Shape:

  • Round: Typically used for lighting fixtures and ceiling fan boxes. Their curved design fits standard round electrical applications and promotes balanced weight distribution.
  • Square: Ideal for mounting switches and outlets, especially in drywall or masonry walls. Their boxy shape provides more internal space for wire connections and flexibility in installation.

At Supply Ontime, we offer reliable materials designed to meet your project’s needs. With same-day delivery across the Greater Los Angeles area, we make it easy to keep your projects on schedule. Order Electrical Boxes now and get them delivered today!

Electrical Boxes FAQ

Are weatherproof electrical boxes required in Los Angeles?

Weatherproof electrical boxes are required anywhere wiring is exposed outdoors in Los Angeles. For receptacles, extra-duty in-use covers are typically required to protect devices while cords are plugged in, helping boxes stay compliant and safe in wet or coastal conditions. Their job is to shield connections from rain, dust, and moisture, which is especially important in coastal areas where salt air accelerates corrosion. Common materials include heavy-duty PVC, polycarbonate, and die-cast metal, paired with gasketed “in-use” covers that keep devices protected even while cords are plugged in. Always follow the latest code and listing requirements for the specific location.

What sizes of electrical boxes are available for delivery in Los Angeles?

The sizes of electrical boxes available for delivery in Los Angeles span a wide range and are rated by volume (cubic inches) to ensure there is enough free space for conductors and devices. Common volumes include 18, 20, 22, and 25 cu in for single-gang boxes, with deeper or multi-gang options for added devices and conductor counts. Choosing the correct size prevents overcrowding, supports proper heat dissipation, and helps meet code fill calculations—especially important when adding GFCI/Smart switches or pigtails during remodels.

Frequently asked question

Yes, electrical boxes can be delivered the same day in Los Angeles. Supply Ontime offers fast drop-offs—often within a few hours when in stock—or you can book a scheduled two-hour window to match inspection times or crew starts. Delivery choices include Truck Bed Delivery, Curbside Delivery, and White Gloves Delivery (first-door placement), so materials reach homes, apartments, and active jobsites without disrupting the schedule.