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. AN-16F
    As low as $22.74 per unit
    6.29 x 3.93 x 2.37 in.
    160 x 100 x 60 mm.
    Material: Aluminum
  2. AN-07F
    As low as $27.15 per unit
    8.76 x 5.75 x 2.17 in.
    223 x 146 x 55 mm.
    Material: Aluminum
  3. AN-19P
    As low as $10.49 per unit
    3.13 x 2.93 x 2.05 in.
    80 x 74 x 52 mm.
    Material: Aluminum
  4. AN-08F
    As low as $31.93 per unit
    8.76 x 5.75 x 3.24 in.
    223 x 146 x 82 mm.
    Material: Aluminum
  5. AN-23P
    As low as $35.85 per unit
    10.24 x 6.30 x 3.56 in.
    260 x 160 x 90 mm.
    Material: Aluminum
  6. AN-23F
    As low as $49.85 per unit
    10.24 x 6.30 x 3.56 in.
    260 x 160 x 90 mm.
    Material: Aluminum
  7. AN-22P
    As low as $33.41 per unit
    7.87 x 4.72 x 2.95 in.
    200 x 120 x 75 mm.
    Material: Aluminum
  8. AN-22F
    As low as $32.29 per unit
    7.87 x 4.72 x 2.95 in.
    200 x 120 x 75 mm.
    Material: Aluminum
  9. AN-21P
    As low as $19.78 per unit
    6.89 x 3.15 x 2.36 in.
    175 x 80 x 60 mm.
    Material: Aluminum
  10. AN-21F
    As low as $28.19 per unit
    6.89 x 3.15 x 2.36 in.
    175 x 80 x 60 mm.
    Material: Aluminum
  11. AN-20P
    As low as $7.12 per unit
    4.04 x 2.07 x 1.00 in.
    103 x 53 x 25 mm.
    Material: Aluminum
  12. Timer Module

    Customized enclosures in as little as 1 week

    Minimal cost. Maximum impact.

    Learn More
  13. AN-20F
    As low as $16.05 per unit
    4.04 x 2.07 x 1.00 in.
    103 x 53 x 25 mm.
    Material: Aluminum
  14. AN-19F
    As low as $18.49 per unit
    3.13 x 2.93 x 2.05 in.
    80 x 74 x 52 mm.
    Material: Aluminum
  15. AN-18P
    As low as $6.17 per unit
    2.19 x 1.61 x 1.22 in.
    56 x 41 x 31 mm.
    Material: Aluminum
  16. AN-18F
    As low as $13.72 per unit
    2.19 x 1.61 x 1.22 in.
    56 x 41 x 31 mm.
    Material: Aluminum
  17. AN-17P
    As low as $24.56 per unit
    6.29 x 3.93 x 3.19 in.
    160 x 100 x 81 mm.
    Material: Aluminum
  18. AN-17F
    As low as $25.07 per unit
    6.29 x 3.93 x 3.19 in.
    160 x 100 x 81 mm.
    Material: Aluminum
  19. AN-16P
    As low as $22.23 per unit
    6.29 x 3.93 x 2.37 in.
    160 x 100 x 60 mm.
    Material: Aluminum
  20. AN-15P
    As low as $12.68 per unit
    5.91 x 2.52 x 1.45 in.
    150 x 64 x 37 mm.
    Material: Aluminum
  21. AN-15F
    As low as $21.66 per unit
    5.91 x 2.52 x 1.45 in.
    150 x 64 x 37 mm.
    Material: Aluminum
  22. AN-14P
    As low as $13.38 per unit
    4.90 x 3.14 x 2.26 in.
    124 x 80 x 57 mm.
    Material: Aluminum
  23. AN-14F
    As low as $13.63 per unit
    4.90 x 3.14 x 2.26 in.
    124 x 80 x 57 mm.
    Material: Aluminum
  24. Timer Module

    Customized enclosures in as little as 1 week

    Minimal cost. Maximum impact.

    Learn More

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Customization Services

CNC Machining

Receive your enclosures with the cutouts you need, so they are ready to go to work for you. 
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Digital Printing

Weatherproof and chemical-resistant ink printed directly onto the enclosure, that won't peel, bubble or scratch.
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Minimal Cost. Maximum Impact.

outdoor waterproof enclosure

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