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Light Speed Delivery - Same-Day or Scheduled

Electrical Boxes

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SKU 235159

Octagon Box 4 in. with 1/2 in. Knockouts

Original price $3.43 - Original price $3.43
Original price
$3.43
$3.43 - $3.43
Current price $3.43
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About This Product Switch and outlet boxes are safeguarded against rust and corrosion through zinc galvanization. This is a 4-inch pre-galvanized s...

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SKU 475977

Square Box 4 in. Metallic with CV Bracket

Original price $8.03 - Original price $8.03
Original price
$8.03
$8.03 - $8.03
Current price $8.03
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About This Product Attaches the 2-Gang Square Electrical Box to a wall stud for containing electrical switch and outlet wiring. This box provides s...

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SKU 429756

Electrical Box Cover Blank Square Metallic 4 in.

Original price $1.54 - Original price $1.54
Original price
$1.54
$1.54 - $1.54
Current price $1.54
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About This Product Cover for integrated wall or ceiling installation with a 4-inch Flat and Blank Square Box Cover. This cover features 4 pre-tappe...

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SKU 393144

Square Cover Metallic Flat 4 in. with 1/2 in. Knockout

Original price $2.10 - Original price $2.10
Original price
$2.10
$2.10 - $2.10
Current price $2.10
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About This Product Protect the contents of an electrical box using the 2-Gang Blank Square Electrical Box Cover. This cover features a 1/2 in. knoc...

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SKU 504564

Metal Round Pancake Box 4 in. 6 cu. in.

Original price $5.67 - Original price $5.67
Original price
$5.67
$5.67 - $5.67
Current price $5.67
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About This Product The 6 cubic inch Round Pancake Ceiling Box supports up to 35 pounds for ceiling fan installations. This ceiling box includes thr...

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SKU 066768

Handy Box Square 2 Device 4 in. 30.3 cu. in.

Original price $14.12 - Original price $14.12
Original price
$14.12
$14.12 - $14.12
Current price $14.12
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About This Product Install electrical outlets and switches onto wood or metal studs using the Handy Box. This electrical box features zinc galvaniz...

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SKU 834347

Ceiling Electrical Box 4 in. Hard Shell PVC New Work 25 cu. in.

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 Non-Metallic Hard-Shell Ceiling Box is built to withstand breaking or cracking, even under harsh conditions. Constructed fro...

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SKU 728580

Electrical Ceiling Box 4 in. Hard Shell PVC New Work with Adjustable Hanger Bar Ground Lug 24.5 cu. in.

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 New Work Round 25 cu. in. Non-Metallic Hard-Shell Ceiling Box is engineered to withstand breaking or cracking, even under se...

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SKU 802105

Electrical Ceiling Box PVC New Work 4 in. 20 cu. in.

Original price $12.42 - Original price $12.42
Original price
$12.42
$12.42 - $12.42
Current price $12.42
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About This Product The 1-Gang 20 cu. in. Ceiling Outlet Box is suitable for a ceiling light or fan. It is intended for use with non-metallic sheath...

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SKU 945708

Handy Box 4 in. x 2-1/8 in. with 3/4 in. Knockouts

Original price $5.08 - Original price $5.08
Original price
$5.08
$5.08 - $5.08
Current price $5.08
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About This Product The 1-Gang Handy Box is equipped with 8 knockouts to provide multiple installation choices. This box is UL listed. It is intende...

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SKU 954164

Steel Octagon Box 4 in. 2-1/8 in. Deep with NM Cable Clamp

Original price $4.81 - Original price $4.81
Original price
$4.81
$4.81 - $4.81
Current price $4.81
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About This Product Safeguard electrical wire connections and household components for switches and outlets with the 4 in. Octagon Electrical Box. T...

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SKU 868426

Handy/Utility Box 4 in. x 2-1/8 in. D

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 This 1-Gang Handy Box is crafted from steel for long-lasting performance. It is designed for indoor use and features 10 knockout...

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SKU 885919

Metal Electrical Box 1-Gang New Work Handy/Utility 4 in. x 2 1/8 in. x 2 1/8 in. 14.5 cu. in. with 3/4 in. Knockouts

Original price $5.57 - Original price $5.57
Original price
$5.57
$5.57 - $5.57
Current price $5.57
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About This Product Metallic outlet boxes offer modern and effective solutions for electrical rough-in work. Creative bracket designs make it easier...

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SKU 286687

Steel Octagon Box 4 in. with C-5 Cable Clamp 15.8 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 4 in. pre-galvanized steel octagonal box. 1-1/2 in. deep, 15.8 cu. in. Fabricated design featuring 1/2 in. knockouts and a non-m...

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SKU 285101

Octagon Box 4 in. 1-1/2 in. Deep with V-Bracket

Original price $4.76 - Original price $4.76
Original price
$4.76
$4.76 - $4.76
Current price $4.76
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About This Product The 4-inch Octagon Box with V Bracket is constructed from steel for long-lasting performance. It includes 8 knockouts to enable ...

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SKU 364761

Octagon Box Non-Metallic 4 in. 1-1/2 in. with V Bracket Cable Clamps Box

Original price $7.80 - Original price $7.80
Original price
$7.80
$7.80 - $7.80
Current price $7.80
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About This Product 4-inch pre-galvanized steel octagonal box. 1-1/2 inches deep, with a capacity of 15.8 cubic inches. Features drawn construction ...

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SKU 795370

Handy Box 2-Gang Square 30.3 cu. in.

Original price $14.24 - Original price $14.24
Original price
$14.24
$14.24 - $14.24
Current price $14.24
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About This Product The 2-Gang 30.3 cu. in. Square Handy Box includes fourteen 1/2 in. knockouts for connecting electrical conduits. This box is equ...

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SKU 449174

Weatherproof Box Closure Plug Metallic Gray 3/4 in. (4-Pack)

Original price $4.81 - Original price $4.81
Original price
$4.81
$4.81 - $4.81
Current price $4.81
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About This Product Threaded sealing plugs are designed to close off unused outlets. These plugs are compatible with weatherproof boxes and can also...

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SKU 826926

FSE Box 3/4 in. 2-Gang

Original price $11.93 - Original price $11.93
Original price
$11.93
$11.93 - $11.93
Current price $11.93
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About This Product 2-Gang, surface-mounted electrical enclosure featuring a single conduit entrance hub and lacking an outlet hub. Designed for con...

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SKU 705143

Electrical Box 2-Gang FSC 3/4 in.

Original price $12.63 - Original price $12.63
Original price
$12.63
$12.63 - $12.63
Current price $12.63
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About This Product 2-Gang, surface-mounted electrical enclosure featuring one conduit entrance hub on each of the two opposing walls of the enclosu...

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SKU 831054

FSS Box 1-Gang 3/4 in.

Original price $11.38 - Original price $11.38
Original price
$11.38
$11.38 - $11.38
Current price $11.38
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About This Product The 3/4 inch 1-Gang FSS Box Body is a versatile, high-quality electrical fitting suitable for both indoor and outdoor applicatio...

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SKU 526612

Round Electrical Box 3.5 in. Hard Shell PVC 14 cu. in.

Original price $6.49 - Original price $6.49
Original price
$6.49
$6.49 - $6.49
Current price $6.49
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About This Product The Super Blue New Work Round 14.5 cu. in. Non-Metallic Hard-Shell Ceiling Box is built to withstand breaking or cracking, even ...

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SKU 727809

Electrical Switch and Outlet Box 3-Gang 55 cu. in. PVC Old Work

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 Zip Box 3-Gang 55 cu. in. Old Work Non-Metallic Switch and Outlet Box is intended for use with non-metallic sheathed cable, ...

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SKU 066717

Electrical Box New Work 3-Gang Adjustable 49 cu. in. PVC

Original price $17.97 - Original price $17.97
Original price
$17.97
$17.97 - $17.97
Current price $17.97
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About This Product The 49 cu. in. PVC 3-Gang Wall Box Adjust-a-box with an Adjustable Bracket for Vertical Mounting is designed to enable depth adj...

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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.