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NEMA 3X Enclosures

NEMA 3X enclosures and junction boxes are designed for indoor or outdoor applications to protect electrical components. NEMA 3X standards offer internal equipment protection against solid objects, damage from corrosion and ice formation and the harmful effects of rain or water ingress. Molded from durable polycarbonate plastic, NEMA 3X enclosures are available in a range of sizes and styles. Looking for a different NEMA rating? View all NEMA enclosures here.

Need a quick summary of how a NEMA 3X enclosure works and how it compares to other NEMA enclosure types? Click “Read More” to learn all about NEMA 3X.

What Is a NEMA 3X Enclosure?

The NEMA 3X rating is part of the NEMA enclosure rating system, a rating scale established by the National Electrical Manufacturers Association for evaluating the protective performance of electrical enclosures. The NEMA system rates enclosures on how well they resist a variety of environmental conditions. These conditions can include anything from light splashing of water to falling dirt and windblown dust to rain, sleet and snow. Some ratings even protect against corrosive agents.

Any NEMA 3 enclosure offers a strong degree of protection from the ingress of water and dust. A rating in the NEMA 3 family (such as NEMA 3X and NEMA 3R) indicates that an enclosure model is suitable for both indoor use and general outdoor use.

Like most other NEMA 3 enclosures, NEMA 3X enclosures are made with a gasket that allows them to effectively keep out water and dust. This makes them popular for sensitive applications such as power distribution, control panels or communications equipment that require excellent protection for sensitive connectors and components.

In addition, NEMA 3X enclosures offer corrosion protection that helps protect devices from the harmful effects of corrosive agents, such as salt water and industrial chemicals. (NEMA ratings that include an X, such as NEMA 4X, always indicate a degree of corrosion resistance.)

NEMA 3X Enclosures from Polycase

Each of the enclosures on this page has been UL tested to meet NEMA 3X standards. Polycase offers NEMA 3X enclosures in durable polycarbonate plastic with many different options based on your performance needs. Use the filter options on the side of this page to look for the features your application requires.

You’ll notice that our NEMA 3X enclosures offer compliance with a variety of other common NEMA standards, such as NEMA 3R, NEMA 4 and NEMA 6P. We design our enclosures to satisfy multiple NEMA enclosure types, allowing us to offer better value to our customers and more sophisticated protection for your devices.

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  1. HD-22F
    As low as $3.88 per unit
    2.63 x 2.63 x 1.63 in.
    67 x 67 x 41 mm.
    Material: Polycarbonate
  2. ML-22F
    As low as $5.80 per unit
    2.63 x 2.63 x 1.63 in.
    67 x 67 x 41 mm.
    Material: Polycarbonate
  3. ZH-040404
    As low as $27.91 per unit
    4.40 x 4.40 x 4.33 in.
    112 x 112 x 110 mm.
    Material: Polycarbonate
  4. ZQ-040404
    As low as $26.50 per unit
    4.40 x 4.40 x 4.33 in.
    112 x 112 x 110 mm.
    Material: Polycarbonate
  5. ML-24F
    As low as $7.99 per unit
    4.50 x 2.63 x 2.05 in.
    114 x 67 x 52 mm.
    Material: Polycarbonate
  6. ML-44F
    As low as $11.10 per unit
    4.50 x 4.50 x 2.44 in.
    114 x 114 x 62 mm.
    Material: Polycarbonate
  7. ML-34F
    As low as $8.67 per unit
    4.53 x 3.56 x 2.25 in.
    115 x 90 x 57 mm.
    Material: Polycarbonate
  8. HD-24F
    As low as $5.46 per unit
    4.63 x 2.63 x 1.63 in.
    118 x 67 x 41 mm.
    Material: Polycarbonate
  9. HD-25F
    As low as $5.72 per unit
    4.63 x 2.63 x 2.37 in.
    118 x 67 x 60 mm.
    Material: Polycarbonate
  10. HD-44F
    As low as $7.64 per unit
    4.63 x 4.63 x 2.36 in.
    118 x 118 x 60 mm.
    Material: Polycarbonate
  11. HP-050403
    As low as $14.52 per unit
    5.22 x 4.22 x 3.28 in.
    133 x 107 x 83 mm.
    Material: Polycarbonate
  12. outdoor waterproof enclosure

    Save time and money with Polycase customization services

    pricing in 90 seconds

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  13. HD-35F
    As low as $6.71 per unit
    5.50 x 3.50 x 1.50 in.
    140 x 89 x 38 mm.
    Material: Polycarbonate
  14. HD-36F
    As low as $7.04 per unit
    5.50 x 3.50 x 2.36 in.
    140 x 89 x 60 mm.
    Material: Polycarbonate
  15. ML-45F
    As low as $11.28 per unit
    5.50 x 4.13 x 2.44 in.
    140 x 105 x 62 mm.
    Material: Polycarbonate
  16. ML-46F
    As low as $12.02 per unit
    6.13 x 4.63 x 2.44 in.
    156 x 118 x 62 mm.
    Material: Polycarbonate
  17. HP-060504
    As low as $16.74 per unit
    6.22 x 5.22 x 4.28 in.
    158 x 133 x 109 mm.
    Material: Polycarbonate
  18. ZH-060404
    As low as $34.89 per unit
    6.40 x 4.40 x 4.33 in.
    163 x 112 x 110 mm.
    Material: Polycarbonate
  19. ZQ-060404
    As low as $33.12 per unit
    6.40 x 4.40 x 4.33 in.
    163 x 112 x 110 mm.
    Material: Polycarbonate
  20. ZH-060604
    As low as $39.18 per unit
    6.40 x 6.40 x 5.22 in.
    163 x 163 x 133 mm.
    Material: Polycarbonate
  21. ZQ-060604
    As low as $37.23 per unit
    6.40 x 6.40 x 5.22 in.
    163 x 163 x 133 mm.
    Material: Polycarbonate
  22. ML-36F
    As low as $11.01 per unit
    6.50 x 3.25 x 3.39 in.
    165 x 83 x 86 mm.
    Material: Polycarbonate
  23. HD-46F
    As low as $7.63 per unit
    6.63 x 4.68 x 1.63 in.
    168 x 119 x 41 mm.
    Material: Polycarbonate
  24. outdoor waterproof enclosure

    Save time and money with Polycase customization services

    pricing in 90 seconds

    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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