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Light Speed Delivery - Same-Day or Scheduled
Light Speed Delivery - Same-Day or Scheduled

Electrical Boxes

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SKU 596247

Box Cover Square 4 in. for Single Toggle Switch Receptacle

Original price $4.06 - Original price $4.06
Original price
$4.06
$4.06 - $4.06
Current price $4.06
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About This Product Utilize the 2-Gang Toggle Cover to enclose a single toggle switch within an electrical box. This steel cover is coated with zinc...

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SKU 592513

Weatherproof Box Round Non-Metallic 4 in. with (5) 1/2 in. Holes White

Original price $13.60 - Original price $13.60
Original price
$13.60
$13.60 - $13.60
Current price $13.60
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About This Product Non-metallic weather-resistant boxes are designed to safeguard branch circuits in wet, damp, or dry environments. The powder coa...

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SKU 166041

Weatherproof Box Round Non-Metallic 4 in. with (5) 1/2 in. Holes, Gray

Original price $13.60 - Original price $13.60
Original price
$13.60
$13.60 - $13.60
Current price $13.60
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About This Product Non-metallic weatherproof enclosures are designed to safeguard branch circuits in wet, damp, or dry environments. The powder coa...

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SKU 956755

Weatherproof Extension Ring Round Metallic 4 in. with (4) 1/2 in. Holes Gray

Original price $9.48 - Original price $9.48
Original price
$9.48
$9.48 - $9.48
Current price $9.48
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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 919019

Weatherproof Cover Round Metallic White with (3) 1/2 in. Holes 4 in.

Original price $8.02 - Original price $8.02
Original price
$8.02
$8.02 - $8.02
Current price $8.02
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About This Product Single-gang round lamp holder covers are crafted to accommodate lamps with a 1/2-inch hub base. Made from high-quality die-cast ...

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SKU 449220

Weatherproof Cover Round Metallic with (3) 1/2 in. Holes Gray 4 in.

Original price $7.09 - Original price $7.09
Original price
$7.09
$7.09 - $7.09
Current price $7.09
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About This Product Single-gang round lamp holder covers are crafted to support lamps featuring a 1/2-inch hub base. Constructed from high-quality d...

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SKU 154860

Weatherproof Cover Round Metallic 4 in. Bronze with (3) 1/2 in. Holes

Original price $8.02 - Original price $8.02
Original price
$8.02
$8.02 - $8.02
Current price $8.02
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About This Product Single-gang round lamp holder covers are crafted to accommodate lamps featuring a 1/2-inch hub base. Constructed from high-grade...

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SKU 871305

Weatherproof Box Round Metallic with (5) 3/4 in. Holes Gray 4 in.

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 Weather-resistant boxes are crafted for branch circuit wiring applications in wet, damp, or dry environments. These boxes enclos...

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SKU 021271

Weatherproof Box Round Metallic 4 in. with (5) 1/2 in. Holes, White

Original price $8.86 - Original price $8.86
Original price
$8.86
$8.86 - $8.86
Current price $8.86
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About This Product Weather-resistant boxes are crafted for branch circuit wiring in various environments, including wet, damp, or dry areas. These ...

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SKU 048333

Weatherproof Box Round Metallic 4 in. with (5) 1/2 in. Holes, Gray

Original price $7.82 - Original price $7.82
Original price
$7.82
$7.82 - $7.82
Current price $7.82
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About This Product Weatherproof boxes are crafted for branch circuit wiring in wet, damp, or dry environments. These boxes can accommodate receptac...

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SKU 527273

Weatherproof Box Round Metallic 4 in. with (5) 1/2 in. Holes, Bronze

Original price $9.48 - Original price $9.48
Original price
$9.48
$9.48 - $9.48
Current price $9.48
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About This Product Weatherproof enclosures are intended for branch circuit wiring in wet, damp, or dry environments. These enclosures accommodate r...

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SKU 714096

Junction Box 4 in. Round

Original price $14.77 - Original price $14.77
Original price
$14.77
$14.77 - $14.77
Current price $14.77
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About This Product Upgrade your electrical conduit system with conduit bodies. These fittings are made from sturdy PVC, ensuring strong protection ...

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SKU 139774

Weatherproof Cover Round Blank Non-Metallic 4 in. Gray

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 PVC blank weatherproof covers are intended for wiring applications in wet, damp, or dry environments. These covers can also be u...

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SKU 692327

Weatherproof Cover Round Blank Metallic 4 in. Gray

Original price $4.04 - Original price $4.04
Original price
$4.04
$4.04 - $4.04
Current price $4.04
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About This Product Blank covers are crafted to offer weather-resistant protection when a box is utilized for junction purposes. These blank covers ...

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SKU 358758

Ceiling Fan/Light Fixture Side Mount Box Metallic Round 4 in. x 2-1/8 in. Deep 21.5 cu. in. for Old/New Work

Original price $13.37 - Original price $13.37
Original price
$13.37
$13.37 - $13.37
Current price $13.37
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About This Product The 21.5 cu. in. Fan Box enables you to securely install your ceiling fan or light fixture without needing to access the attic. ...

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SKU 487016

Ceiling Fan/Light Fixture Box and Brace Kit Metallic 4 in. Round 2-1/8 in. Deep 21.5 cu. in. for Old/New Work

Original price $28.49 - Original price $28.49
Original price
$28.49
$28.49 - $28.49
Current price $28.49
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About This Product This 21.5 cu. in. ceiling fan brace with a 2-1/8 in. box is perfect for new builds or remodels, allowing you to safely install y...

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SKU 385077

Ceiling Fan/Light Fixture Saddle Mount Box Non-Metallic 4 in. Round 16 cu. in.

Original price $11.08 - Original price $11.08
Original price
$11.08
$11.08 - $11.08
Current price $11.08
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About This Product The 16 cu. in. Non-Metallic Ceiling Fan/Fixture Saddle Mount Box lets you securely install a fan or light fixture during either ...

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SKU 116303

Ceiling Fan/Light Fixture Side Mount Box Round Non-Metallic 4 in. 11.8 cu. in. with Cover

Original price $7.18 - Original price $7.18
Original price
$7.18
$7.18 - $7.18
Current price $7.18
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About This Product The 11.8 cu. in. Non-Metallic Ceiling Fan/Fixture Side Mount Box with Cover enables you to securely install a fan or light fixtu...

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SKU 619746

Ceiling Fan/Light Fixture Pancake Box Metallic 4 in. Round 1/2 in. Deep 5.9 cu. in. for Old/New Work

Original price $5.76 - Original price $5.76
Original price
$5.76
$5.76 - $5.76
Current price $5.76
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About This Product This 5.9 cu. in. ceiling fan box enables you to securely install a fan or lighting fixture during construction. Perfect for use ...

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SKU 827186

Ceiling Fan/Light Fixture Box Metallic Round 4 in. 1-1/2 in. Deep 15.3 cu. in. for Old/New Work

Original price $6.56 - Original price $6.56
Original price
$6.56
$6.56 - $6.56
Current price $6.56
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About This Product This 15.3 cubic inch ceiling fan box enables secure installation of a fan or lighting fixture during construction. It features a...

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SKU 837855

Ceiling Fan/Light Fixture Box and Brace Kit 4 in. Round 1-1/2 in. Deep Metallic for Old/New Work 15.3 cu. in.

Original price $22.60 - Original price $22.60
Original price
$22.60
$22.60 - $22.60
Current price $22.60
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About This Product This new or remodeled ceiling fan brace, with a capacity of 15.3 cu. in. and a 1-1/2 in. box, enables you to securely install yo...

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SKU 417929

Ceiling Fan/Light Fixture Box and Brace Kit for New Work Metallic 4 in. Round 1-1/2 in. Deep 15.3 cu. in.

Original price $12.31 - Original price $12.31
Original price
$12.31
$12.31 - $12.31
Current price $12.31
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About This Product This 15.3 cu. in. ceiling fan brace for new construction, featuring a 1-1/2 in. box, allows for the safe installation of ceiling...

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SKU 506188

Electrical Box Cover Round Blank Blue PVC 4 in.

Original price $2.53 - Original price $2.53
Original price
$2.53
$2.53 - $2.53
Current price $2.53
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About This Product The round blank box cover is designed to cover 4 in. round switch or outlet boxes. Made of durable PVC which is non-corrosive a...

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SKU 235159

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

Original price $2.88 - Original price $2.88
Original price
$2.88
$2.88 - $2.88
Current price $2.88
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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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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.