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NEMA 4X Enclosures & Boxes

NEMA 4X enclosures provide superior protection in harsh indoor or outdoor environments for electrical and electronic equipment. Meeting NEMA 4X specifications ensure protection against corrosion, splashing, and hose-directed water, rain, and ice. NEMA 4X boxes are independently tested and certified by UL. NEMA 4X electrical enclosures are available in plastic, aluminum, steel, and stainless steel. With a variety of styles and sizes available, NEMA 4X junction boxes are commonly used in industries including telecommunication, alternative energy, agriculture, oil & gas, food & beverage, marine, and more.

What exactly does a NEMA 4X rating signify, and how can you find a reliable NEMA 4X enclosure? Find out more below.

Key Characteristics of NEMA 4X Enclosures

The NEMA rating scale is one of two major tools (alongside the IP rating scale) for evaluating an enclosure’s protective qualities against the ingress of liquids and solids. A NEMA Type 4X enclosure rating is one of the most commonly specified ratings because it offers a robust and versatile set of protective features.

First, a NEMA 4X enclosure is rated for outdoor use, although it can also be used indoors. That means it’s protected against weather conditions like rain, snow, and sleet, as well as splashes from sources such as a hose spray. In addition, a NEMA 4X enclosure provides protection from all kinds of windblown dust and particulates from the environment. Typically, a waterproof silicone gasket is built into the enclosure to seal it against liquids and dust and keep the components safe within.

NEMA 4X enclosures are also resistant to corrosion. This includes multiple potential sources of corrosion, including fresh water, salt water, and (depending on the enclosure materials used) corrosive chemicals. Corrosion resistance can be a critically important property in applications such as marine facilities and chemical manufacturing, making NEMA 4X enclosures a key element in protecting devices in many extreme environments.

Polycase’s NEMA 4X Enclosure Selection

Our enclosure selection includes dozens of models with NEMA 4X ratings. We’ve carefully built our lineup of NEMA 4X models to include options across the full spectrum of enclosure materials and features. Choose from materials such as our 304 stainless steel enclosures and our polycarbonate enclosures, most of which are available with features such as wall mount flanges and PCB mounting bosses.

You’ll also find that our NEMA 4X enclosures are easy to customize to the needs of your application. First, be sure to explore our enclosure customization options, including custom CNC machining and digital printing. Get custom cutouts for cable pass-throughs, switches, and connectors, and have your graphics printed directly onto the enclosure using brilliant UV-resistant inks that resist cracking and fading. Additionally, to maintain the protective qualities of your enclosure around cutout areas, consider our range of NEMA enclosure accessories like vents and cable glands.

Shop our full selection of NEMA 4X enclosures here, or use the filter tools to find the enclosure with the features and materials you’re looking for. For more information on the NEMA 4X rating and how it can be useful to your applications, see our guide to NEMA 4X enclosures.

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  1. Polycase NEMA plastic electronics enclosure New
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    HN-88 Weatherproof Enclosure
    As low as $36.07 per unit
    Internal: 10" x 7.3" x 3.7"
    268 x 185 x 94 mm
    External: 11" x 7.7" x 4.0"
    279 x 197 x 102 mm
    Material: Polycarbonate
  2. Large outdoor rated electrical enclosures
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    HP-111106 Hinged Outdoor Electrical Box
    As low as $49.34 per unit
    Internal: 10" x 10" x 6.0"
    270 x 270 x 152 mm
    External: 11" x 11" x 6.3"
    287 x 287 x 161 mm
    Material: Polycarbonate
  3. AN-16F Natural diecast aluminum enclosure with flanges for wall mounting - 6.29 x 3.93 x 2.37 inches
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    AN-16F Diecast Aluminum NEMA Enclosure
    As low as $27.29 per unit
    Internal: 5.7" x 3.4" x 2.1"
    147 x 87 x 55 mm
    External: 6.2" x 3.9" x 2.3"
    160 x 100 x 60 mm
    Material: Aluminum
  4. plastic junction box with hinged cover, NEMA 4X rated
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    WQ-51 Weatherproof Box
    As low as $31.43 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
  5. ML-34F*15 Gray outdoor waterproof enclosure rated NEMA 4x and NEMA 6P - 4.53 x 3.56 x 2.25 inches
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    ML-34F Outdoor NEMA Enclosure
    As low as $8.67 per unit
    Internal: 4.1" x 3.1" x 1.9"
    105 x 79 x 49 mm
    External: 4.5" x 3.5" x 2.2"
    115 x 90 x 57 mm
    Material: Polycarbonate
  6. Surface mounting outdoor electrical boxes
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    HP-070403 Hinged NEMA Outdoor Enclosure
    As low as $16.03 per unit
    Internal: 6.6" x 3.3" x 3.0"
    168 x 86 x 76 mm
    External: 7.4" x 4.2" x 3.2"
    190 x 107 x 83 mm
    Material: Polycarbonate
  7. American made weatherproof electronics enclosure New
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    HN-57 NEMA 4X Enclosure
    As low as $14.33 per unit
    Internal: 6.3" x 4.5" x 2.7"
    160 x 116 x 70 mm
    External: 6.7" x 5.0" x 3.0"
    171 x 127 x 78 mm
    Material: Polycarbonate
  8. Large outdoor NEMA 4 junction boxes
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    HP-130706 Large Outdoor Junction Box
    As low as $47.63 per unit
    Internal: 12" x 6.6" x 6.0"
    321 x 169 x 152 mm
    External: 13" x 7.2" x 6.3"
    337 x 185 x 161 mm
    Material: Polycarbonate
  9. HD-36F Duo enclosure photo black and gray
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    HD-36F Polycarbonate Waterproof Box
    As low as $7.04 per unit
    Internal: 5.0" x 3.0" x 1.8"
    128 x 77 x 48 mm
    External: 5.5" x 3.5" x 2.3"
    140 x 89 x 60 mm
    Material: Polycarbonate
  10. Polycase waterproof case
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    ZQ-141204 Submersible Electrical Enclosure
    As low as $58.67 per unit
    Internal: 13" x 11" x 4.8"
    346 x 296 x 123 mm
    External: 14" x 12" x 5.2"
    370 x 319 x 133 mm
    Material: Polycarbonate
  11. Large waterproof box
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    HP-151106 Waterproof Electrical Box
    As low as $61.22 per unit
    Internal: 14" x 10" x 6.0"
    367 x 265 x 152 mm
    External: 15" x 11" x 6.3"
    388 x 287 x 161 mm
    Material: Polycarbonate
  12. promo card - ex

    SURFACE MOUNTING ELECTRICAL BOXES

    Made in the USA, the HD Series offers premium protection against all weather conditions, and unwanted tampering. With hidden cover screws, and convenient surface-mounting flanges, this series is a go-to for outdoor electronics.

    SHOP NEMA RATED HD SERIES
  13. Polycase waterproof electrical enclosure
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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
  14. ZH-141204
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    ZH-141204 NEMA-Rated Hinged Junction Box
    As low as $62.02 per unit
    Internal: 13" x 11" x 4.8"
    346 x 296 x 123 mm
    External: 14" x 12" x 5.2"
    370 x 319 x 133 mm
    Material: Polycarbonate
  15. HP-110706
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    HP-110706 IP66 Hinged Electrical Enclosure
    As low as $44.45 per unit
    Internal: 10" x 6.4" x 6.0"
    265 x 164 x 152 mm
    External: 11" x 7.2" x 6.3"
    287 x 185 x 161 mm
    Material: Polycarbonate
  16. Watertight plastic electronics enclosure New
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    HN-45 IP-Rated Electronic Enclosure
    As low as $10.20 per unit
    Internal: 4.5" x 3.3" x 1.8"
    116 x 84 x 48 mm
    External: 5.0" x 3.7" x 2.5"
    127 x 95 x 65 mm
    Material: Polycarbonate
  17. Medium sized weatherproof junction boxes
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    HP-090403 Waterproof Hinged Enclosure
    As low as $18.05 per unit
    Internal: 8.6" x 4.1" x 3.0"
    219 x 105 x 76 mm
    External: 9.2" x 4.7" x 3.2"
    234 x 120 x 83 mm
    Material: Polycarbonate
  18. Polycase NEMA rated enclosure
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    HP-070705 IP66 Junction Box
    As low as $24.76 per unit
    Internal: 6.6" x 6.6" x 5.5"
    169 x 169 x 140 mm
    External: 7.2" x 7.2" x 5.7"
    183 x 183 x 147 mm
    Material: Polycarbonate
  19. NEMA 4X electronic enclosures made in the USA New
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    HN-68 Waterproof Enclosure
    As low as $18.07 per unit
    Internal: 7.3" x 5.3" x 3.0"
    185 x 135 x 77 mm
    External: 7.7" x 5.7" x 3.3"
    197 x 146 x 84 mm
    Material: Polycarbonate
  20. Polycase hinged waterproof electrical enclosure
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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"
    117 x 91 x 76 mm
    External: 5.2" x 4.2" x 3.2"
    133 x 107 x 83 mm
    Material: Polycarbonate
  21. Polycase hinged waterproof electrical enclosure
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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"
    142 x 117 x 102 mm
    External: 6.2" x 5.2" x 4.2"
    158 x 133 x 109 mm
    Material: Polycarbonate
  22. ML-45F*15 Gray waterproof NEMA enclosure for electronics - 5.5 x 4.13 x 2.44 inches
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    ML-45F Outdoor NEMA Enclosure
    As low as $11.28 per unit
    Internal: 5.0" x 3.6" x 2.1"
    129 x 93 x 54 mm
    External: 5.5" x 4.1" x 2.4"
    140 x 105 x 62 mm
    Material: Polycarbonate
  23. Polycase hinged waterproof electrical enclosure
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    HP-070504 NEMA Electrical Box
    As low as $18.86 per unit
    Internal: 6.6" x 4.6" x 4.0"
    168 x 117 x 102 mm
    External: 7.2" x 5.2" x 4.2"
    183 x 133 x 109 mm
    Material: Polycarbonate
  24. promo card - ex

    SURFACE MOUNTING ELECTRICAL BOXES

    Made in the USA, the HD Series offers premium protection against all weather conditions, and unwanted tampering. With hidden cover screws, and convenient surface-mounting flanges, this series is a go-to for outdoor electronics.

    SHOP NEMA RATED HD SERIES

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