Skip to content
Light Speed Delivery - Same-Day or Scheduled
Light Speed Delivery - Same-Day or Scheduled

Electrical Boxes

Filters

SKU 675965

Weatherproof Box Metallic 1-Gang Gray with (3) 3/4 in. Holes

Original price $10.84 - Original price $10.84
Original price
$10.84
$10.84 - $10.84
Current price $10.84
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Weatherproof boxes are intended for application in branch circuit wiring across wet, damp, or dry environments. These boxes acco...

View full details
SKU 397102

Weatherproof Box Metallic 1-Gang White with (3) 1/2 in. Holes

Original price $7.19 - Original price $7.19
Original price
$7.19
$7.19 - $7.19
Current price $7.19
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Weatherproof enclosures are intended for branch circuit wiring in wet, damp, or dry environments. These boxes accommodate recept...

View full details
SKU 404904

Weatherproof Box 1-Gang Metallic Gray with (3) 1/2 in. Holes

Original price $7.19 - Original price $7.19
Original price
$7.19
$7.19 - $7.19
Current price $7.19
Buy More Pay Less
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Weather-resistant boxes are intended for use in branch circuit wiring in wet, damp, or dry environments. These boxes accommodate...

View full details
SKU 713546

Weatherproof Box 1-Gang Metallic with (3) 1/2 in. Holes, Bronze

Original price $7.19 - Original price $7.19
Original price
$7.19
$7.19 - $7.19
Current price $7.19
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Weatherproof enclosures are intended for branch circuit wiring in wet, damp, or dry environments. These enclosures accommodate r...

View full details
SKU 470039

Weatherproof Box Metallic 1-Gang with (3) 1 in. Holes Gray

Original price $20.50 - Original price $20.50
Original price
$20.50
$20.50 - $20.50
Current price $20.50
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Weatherproof enclosures are intended for application in branch circuit wiring in wet, damp, or dry environments. These enclosure...

View full details
SKU 637856

Weatherproof Flat Cover 1-Gang Horizontal/Vertical Non-Metallic (24-in-1-Configurations) Clear

Original price $9.64 - Original price $9.64
Original price
$9.64
$9.64 - $9.64
Current price $9.64
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Weatherproof nonmetallic flat device covers offer protection against the elements for a 1-Gang box. These flat weatherproof cove...

View full details
SKU 709734

Weatherproof Flat Cover White Horizontal/Vertical Metallic 1-Gang (24-in-1-Configurations)

Original price $7.22 - Original price $7.22
Original price
$7.22
$7.22 - $7.22
Current price $7.22
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Metallic flat device covers offer weather-resistant protection for an outlet. These flat covers are crafted from metal for enhan...

View full details
SKU 924270

Weatherproof Metallic Flat Cover 1-Gang Horizontal/Vertical (24-in-1-Configurations) Gray

Original price $7.22 - Original price $7.22
Original price
$7.22
$7.22 - $7.22
Current price $7.22
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Metallic flat device covers offer weather-resistant protection for an outlet. These flat covers are constructed from metal, ensu...

View full details
SKU 885320

Weatherproof Cover Flat Bronze Horizontal/Vertical Metallic 1-Gang (24-in-1-Configurations)

Original price $7.22 - Original price $7.22
Original price
$7.22
$7.22 - $7.22
Current price $7.22
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Metallic flat device covers offer weather-resistant protection for an outlet. These flat covers are constructed from metal for o...

View full details
SKU 702298

Electrical Box 1-Gang FSS - Gray

Original price $10.84 - Original price $10.84
Original price
$10.84
$10.84 - $10.84
Current price $10.84
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product The 1-Gang FSS Electrical Box is a surface-mounted electrical enclosure crafted from sturdy PVC plastic, featuring two conduit e...

View full details
SKU 268769

Electrical Box 1-Gang FSCC

Original price $11.93 - Original price $11.93
Original price
$11.93
$11.93 - $11.93
Current price $11.93
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Improve your electrical setups with type FSE and type FSCC exposed boxes. These electrical conduit fittings are built for streng...

View full details
SKU 186355

Weatherproof Receptacle Cover 1-Gang Extra Duty Non-Metallic Low Profile While-In-Use Horizontal/Vertical Gray

Original price $14.47 - Original price $14.47
Original price
$14.47
$14.47 - $14.47
Current price $14.47
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product The low-profile non-metallic while-in-use device covers offer weather-resistant protection when an outlet is active. These while...

View full details
SKU 914568

Weatherproof Receptacle Cover 1-Gang Horizontal/Vertical Extra Duty Non-Metallic Low Profile While-In-Use with GFCI Gray

Original price $46.44 - Original price $46.44
Original price
$46.44
$46.44 - $46.44
Current price $46.44
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Low-profile non-metallic while-in-use device cover kits offer weatherproof protection for active outlets. These while-in-use cov...

View full details
SKU 190653

Weatherproof In-Use Cover Kit 1-Gang Extra Duty Metallic Gray 12-in-1-Configurations

Original price $45.86 - Original price $45.86
Original price
$45.86
$45.86 - $45.86
Current price $45.86
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product The metallic while-in-use device cover kit offers weatherproof protection when an outlet is actively being used. These while-in-...

View full details
SKU 638355

Weatherproof In-Use Cover Gray 1-Gang Extra Duty Metallic (12-in-1-Configurations)

Original price $20.50 - Original price $20.50
Original price
$20.50
$20.50 - $20.50
Current price $20.50
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Metallic while-in-use device covers offer weather-resistant protection when an outlet is actively being utilized. These while-in...

View full details
SKU 793140

Weatherproof Cover Kit 1-Gang Extra Duty Horizontal/Vertical Non-Metallic In-Use Clear (16-in-1-Configurations)

Original price $48.16 - Original price $48.16
Original price
$48.16
$48.16 - $48.16
Current price $48.16
Buy More Pay Less
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product non-metallic while-in-use device covers offer weather-resistant protection when an outlet is actively being used. These while-in...

View full details
SKU 901613

Weatherproof In-Use Cover Non-Metallic Horizontal/Vertical 1-Gang Extra Duty White (16-in-1-Configurations)

Original price $15.67 - Original price $15.67
Original price
$15.67
$15.67 - $15.67
Current price $15.67
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Non-metallic while-in-use device covers offer weather-resistant protection when an outlet is actively being used. These while-in...

View full details
SKU 688447

Weatherproof In-Use Cover 1-Gang Extra Duty Horizontal/Vertical Non-Metallic Gray (16-in-1-Configurations)

Original price $15.67 - Original price $15.67
Original price
$15.67
$15.67 - $15.67
Current price $15.67
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Non-metallic while-in-use device covers offer weatherproof protection when an outlet is actively in use. These while-in-use cove...

View full details
SKU 918847

Weatherproof In-Use Cover Horizontal/Vertical Non-Metallic Extra Duty 1-Gang Clear (16-in-1-Configurations)

Original price $13.26 - Original price $13.26
Original price
$13.26
$13.26 - $13.26
Current price $13.26
Buy More Pay Less
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product non-metallic while-in-use device covers offer weatherproof protection for outlets during use. These while-in-use covers are cons...

View full details
SKU 093027

Weatherproof In-Use Cover 1-Gang Extra Duty Horizontal/Vertical Non-Metallic (16-in-1-Configurations) Bronze

Original price $15.67 - Original price $15.67
Original price
$15.67
$15.67 - $15.67
Current price $15.67
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product The non-metallic while-in-use device covers offer weatherproof protection when an outlet is actively being used. These while-in-...

View full details
SKU 854030

Weatherproof In-Use Cover Extra Duty Horizontal Metallic 1-Gang Gray (12-in-1-Configurations)

Original price $21.71 - Original price $21.71
Original price
$21.71
$21.71 - $21.71
Current price $21.71
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Metallic while-in-use device covers offer weather-resistant protection when an outlet is actively being used. These while-in-use...

View full details
SKU 499298

Weatherproof In-Use Cover Non-Metallic Horizontal/Vertical Expandable Extra Duty 1-Gang White (16-in-1 Configurations)

Original price $12.05 - Original price $12.05
Original price
$12.05
$12.05 - $12.05
Current price $12.05
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Low-profile non-metallic while-in-use device covers offer weatherproof protection for active outlets. These while-in-use covers ...

View full details
SKU 263799

Weatherproof In-Use Cover Non-Metallic 1-Gang Expandable Extra Duty Horizontal/Vertical Gray (16-in-1 Configurations)

Original price $12.05 - Original price $12.05
Original price
$12.05
$12.05 - $12.05
Current price $12.05
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Low-profile non-metallic while-in-use device covers offer weatherproof protection for outlets that are actively in use. These wh...

View full details
SKU 478958

Weatherproof In-Use Cover Bronze 1-Gang Non-Metallic Expandable Extra Duty Horizontal/Vertical (16-in-1 Configurations)

Original price $12.05 - Original price $12.05
Original price
$12.05
$12.05 - $12.05
Current price $12.05
In stock

Delivery

Today within 4 hours or scheduled 2-hour window

About This Product Low-profile non-metallic while-in-use device covers offer weatherproof protection when an outlet is operational. These while-in-...

View full details

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.