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Outdoor Junction Boxes

Outdoor electrical junction boxes are designed to keep sensitive electrical connections protected and secure in any environment, even underground. Meeting a variety of NEMA and IP ratings ensures our waterproof junction boxes are robust and durable for outdoor use, but they can also be used for indoor applications. Outdoor junction boxes come in a variety of styles including options with hinged covers or knockouts, and options that can be wall mounted or pole mounted. With plastic, aluminum, and steel options available in a variety of sizes, it's easy to find the perfect electrical junction box solution. Read our guide on electrical junction box types.

Looking for tips to help you choose the ideal junction box for your application? Find out more key info on junction boxes below.

Key Features and Applications of Outdoor Junction Boxes

Depending on its size, your facility might have dozens, hundreds, or even thousands of key electrical connections that need protection from environmental conditions. Numerous types of connections require junction boxes — from electrical wiring splices to electrical outlet boxes to switch boxes and beyond. Read our guide on junction box types to learn more about the many specific types of junction boxes on the market, including indoor electrical enclosures, cases for light fixtures, receptacles, and other applications. 

It’s critical to match the design features your application requires to a high-quality junction box that fulfills them. For example, a metal junction box is typically a must-have if your electrical connectors require RFI shielding and/or you’re using a metal-sheathed cable. Meanwhile, a plastic junction box is generally the standard choice for applications with non-metallic cable and cable clamps. However, the PVC boxes common in residential applications often aren’t up to the rigors of outdoor and industrial use, which makes materials like polycarbonate a better choice for heavy-duty applications.

Weather and hazard resistance is also a major factor for junction boxes used in demanding applications. Features such as weatherproof gaskets provide critical protection, and NEMA or IP ratings serve as useful guidelines for finding an enclosure with the right protective features. To learn more about choosing an enclosure with the right protective qualities, check out our guide to evaluating junction boxes.

Choosing an Outdoor Junction Box from Polycase

Polycase offers hundreds of weatherproof box models in different shapes, sizes, styles, and NEMA/IP ratings. From 304 stainless steel to polycarbonate plastic with a fiberglass reinforced base, we provide a broad range of durable material choices. On top of the previously mentioned features, our selection also includes options such as locking box covers for secure access control. 

Browse all of our outdoor junction box enclosures here and find the enclosure that’s just right for your application. Need customized cutouts or printing on your junction box? Get started with an instant quote now on our in-house enclosure customization.

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  1. ML-36F duo image
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    ML-36F Outdoor NEMA Enclosure
    As low as $11.01 per unit
    Internal: 6.0" x 2.8" x 2.5"
    154 x 71 x 65 mm
    External: 6.5" x 3.2" x 3.3"
    165 x 83 x 86 mm
    Material: Polycarbonate
  2. HP-151106 New
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    HP-151106 Waterproof Electrical Box
    As low as $61.60 per unit
    Internal: 14" x 10" x 6.0"
    374 x 273 x 152 mm
    External: 15" x 11" x 6.3"
    388 x 287 x 161 mm
    Material: Polycarbonate
  3. Polycase WQ-55 outdoor hinged electrical enclosure
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    WQ-55 Hinged Waterproof Box
    As low as $27.91 per unit
    Internal: 7.0" x 7.0" x 4.8"
    179 x 179 x 123 mm
    External: 8.2" x 8.2" x 5.1"
    210 x 210 x 131 mm
    Material: Polycarbonate
  4. ZH-141204 New
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    ZH-141204 NEMA-Rated Hinged Junction Box
    As low as $62.02 per unit
    Internal: 14" x 12" x 4.8"
    356 x 305 x 122 mm
    External: 14" x 12" x 5.2"
    370 x 319 x 133 mm
    Material: Polycarbonate
  5. Polycase hinged waterproof electrical enclosure New
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    HP-050403 Hinged Weatherproof Enclosure
    As low as $14.52 per unit
    Internal: 4.6" x 3.6" x 3.0"
    118 x 92 x 76 mm
    External: 5.2" x 4.2" x 3.2"
    133 x 107 x 83 mm
    Material: Polycarbonate
  6. plastic junction box with hinged cover, NEMA 4X rated
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    WQ-51 Weatherproof Box
    As low as $29.10 per unit
    Internal: 9.1" x 5.2" x 4.8"
    232 x 134 x 124 mm
    External: 10" x 6.3" x 5.1"
    260 x 160 x 130 mm
    Material: Polycarbonate
  7. AN-19P Natural diecast aluminum enclosure for electronics - 3.13 x 2.93 x 2.05 inches
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    AN-19P Diecast Aluminum NEMA Enclosure
    As low as $10.49 per unit
    Internal: 2.7" x 2.5" x 1.9"
    69 x 64 x 49 mm
    External: 3.1" x 2.9" x 2.0"
    80 x 74 x 52 mm
    Material: Aluminum
  8. ML-22F*15 Gray outdoor waterproof enclosure rated NEMA 4x and NEMA 6P - 2.63 x 2.63 x 1.63 inches
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    ML-22F Outdoor NEMA Enclosure
    As low as $5.80 per unit
    Internal: 2.2" x 2.2" x 1.3"
    58 x 58 x 35 mm
    External: 2.6" x 2.6" x 1.6"
    67 x 67 x 41 mm
    Material: Polycarbonate
  9. weatherproof plastic junction box NEMA and IP
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    ML-48F Weatherproof NEMA Enclosure
    As low as $12.43 per unit
    Internal: 7.1" x 4.1" x 1.9"
    181 x 105 x 49 mm
    External: 7.6" x 4.6" x 2.2"
    193 x 117 x 57 mm
    Material: Polycarbonate
  10. Polycase NEMA enclosure
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    ZH-141406 Hinged NEMA Enclosure
    As low as $73.27 per unit
    Internal: 13" x 13" x 6.8"
    346 x 346 x 173 mm
    External: 14" x 14" x 7.2"
    371 x 371 x 183 mm
    Material: Polycarbonate
  11. Polycase NEMA rated enclosure New
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    HP-070705 IP66 Junction Box
    As low as $24.76 per unit
    Internal: 6.7" x 6.7" x 5.5"
    172 x 172 x 140 mm
    External: 7.2" x 7.2" x 5.7"
    183 x 183 x 147 mm
    Material: Polycarbonate
  12. outdoor electrical enclosure

    ZH SERIES | NO FEET OPTION

    The ZH Series is now available with more mounting options to suit your needs

    SHOP NOW
  13. ZH-100802
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    ZH-100802 Hinged Junction Box
    As low as $45.02 per unit
    Internal: 9.7" x 7.5" x 3.3"
    248 x 191 x 86 mm
    External: 10" x 8.4" x 3.7"
    264 x 213 x 94 mm
    Material: Polycarbonate
  14. HP-110706 New
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    HP-110706 IP66 Hinged Electrical Box
    As low as $44.45 per unit
    Internal: 10" x 6.7" x 6.0"
    273 x 171 x 152 mm
    External: 11" x 7.2" x 6.3"
    287 x 185 x 161 mm
    Material: Polycarbonate
  15. ZQ-141204 New
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    ZQ-141204 Submersible Electrical Enclosure
    As low as $58.67 per unit
    Internal: 14" x 12" x 4.8"
    359 x 308 x 123 mm
    External: 14" x 12" x 5.2"
    370 x 319 x 133 mm
    Material: Polycarbonate
  16. HP-130906 New
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    HP-130906 Weatherproof Electrical Box
    As low as $49.85 per unit
    Internal: 12" x 8.7" x 6.0"
    324 x 222 x 152 mm
    External: 13" x 9.2" x 6.3"
    337 x 236 x 161 mm
    Material: Polycarbonate
  17. large plastic enclosure for outdoor use, weatherproof & waterproof New
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    ML-92F Weatherproof NEMA Enclosure
    As low as $44.57 per unit
    Internal: 11" x 8.5" x 3.9"
    294 x 217 x 99 mm
    External: 12" x 9.0" x 4.2"
    305 x 229 x 108 mm
    Material: Polycarbonate
  18. Polycase hinged waterproof electrical enclosure New
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    HP-060504 IP66 Weatherproof Box
    As low as $16.74 per unit
    Internal: 5.6" x 4.6" x 4.0"
    143 x 118 x 102 mm
    External: 6.2" x 5.2" x 4.2"
    158 x 133 x 109 mm
    Material: Polycarbonate
  19. Polycase WQ-70 outdoor waterproof electrical junction box
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    WQ-70 Hinged Weatherproof Enclosure
    As low as $62.65 per unit
    Internal: 12" x 12" x 5.6"
    313 x 313 x 143 mm
    External: 13" x 13" x 5.9"
    350 x 350 x 152 mm
    Material: Polycarbonate
  20. ZQ-121206
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    ZQ-121206 Electrical Junction Box
    As low as $58.21 per unit
    Internal: 11" x 11" x 6.8"
    296 x 296 x 173 mm
    External: 12" x 12" x 7.2"
    320 x 320 x 183 mm
    Material: Polycarbonate
  21. 6x6x4 electrical enclosure
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    ZH-060604 Hinged Junction Box
    As low as $37.74 per unit
    Internal: 5.7" x 5.7" x 4.8"
    146 x 146 x 124 mm
    External: 6.4" x 6.4" x 5.2"
    163 x 163 x 133 mm
    Material: Polycarbonate
  22. WP-23
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    WP-23 Polycarbonate NEMA Enclosure
    As low as $10.60 per unit
    Internal: 4.1" x 3.2" x 1.9"
    106 x 81 x 49 mm
    External: 4.5" x 3.5" x 2.1"
    115 x 90 x 55 mm
    Material: Polycarbonate