NEMA 3 Enclosures

NEMA 3 boxes and enclosures protect electrical equipment in indoor and outdoor settings. Enclosures meeting NEMA Type 3 standards are designed to withstand windblown dust, rain, sleet and sometimes ice formation (depending on which version of the NEMA 3 standard they meet). Our NEMA 3 enclosures are molded from impact-resistant polycarbonate plastic and we have an array of sizes to choose from. Styles include a hinged or screw-on cover with the ability to surface mount or pole mount enclosures.

A full line of NEMA accessories is available to complete your NEMA 3 enclosure or junction box solution. Learn more about NEMA 3 enclosures below.

NEMA 3 Enclosures: Basic Facts

The National Electrical Manufacturers Association maintains the NEMA rating scale to provide information on the protective qualities of electrical enclosures. (Our complete guide to the NEMA rating system includes a full rundown of each NEMA enclosure type.)

NEMA 3 is one of the most common ratings in enclosures designed for outdoor use. Most NEMA 3 models are built with a waterproof gasket that keeps out water and solid particulates (although some NEMA 3R enclosures aren’t). You can count on a NEMA 3 enclosure for a high degree of protection against:

  • Adverse weather including rain, snow and sleet
  • Light splashing with water
  • Falling dirt and windblown dust
  • Accidental contact with personnel

The NEMA 3 rating also has several variants with different protective characteristics, including NEMA 3R, NEMA 3S, NEMA 3X and various combinations like NEMA 3RX. For more information on these ratings, see our guide to NEMA 3 vs. NEMA 3R enclosures.

Choosing Your NEMA 3 Enclosure

Polycase is a go-to source for reliable outdoor enclosures designed to protect your most sensitive electrical components, with dozens of high-quality NEMA 3 rated models available. Many of our NEMA 3 enclosures also feature higher ratings that offer additional protection, such as NEMA 4X for corrosion resistance and NEMA 6P for submersion resistance. All of our NEMA enclosures are UL Listed to ensure impeccable reliability and compliance.

Our enclosures also come with a variety of features and configurations to further increase their versatility and protection. From wall mount flanges to knockouts to hinged and screw cover enclosures, you’ll find the features you’re looking for in Polycase’s NEMA 3 enclosure selection. Need something customized? Our in-house customization services offer both CNC machining and digital printing, making it incredibly simple to get an enclosure that meets your needs.

Browse all of our NEMA 3 enclosures here, or see all of our outdoor enclosures to discover additional options for your outdoor application, including stainless steel and aluminum enclosures.

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  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. electronic enclosure with graphics

    Take your enclosure from plain to powerful

    with CNC machining and digital printing services from Polycase

    Learn More
  13. 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
  14. 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
  15. ML-48F
    As low as $12.43 per unit
    7.61 x 4.61 x 2.26 in.
    193 x 117 x 57 mm.
    Material: Polycarbonate
  16. ML-47F
    As low as $13.81 per unit
    7.61 x 4.61 x 3.09 in.
    193 x 117 x 78 mm.
    Material: Polycarbonate
  17. ZH-080604
    As low as $42.06 per unit
    8.40 x 6.40 x 5.22 in.
    213 x 163 x 133 mm.
    Material: Polycarbonate
  18. ZQ-080604
    As low as $39.94 per unit
    8.40 x 6.40 x 5.22 in.
    213 x 163 x 133 mm.
    Material: Polycarbonate
  19. ZH-080804
    As low as $48.37 per unit
    8.40 x 8.40 x 5.22 in.
    213 x 213 x 133 mm.
    Material: Polycarbonate
  20. ZQ-080804
    As low as $45.97 per unit
    8.40 x 8.40 x 5.22 in.
    213 x 213 x 133 mm.
    Material: Polycarbonate
  21. ML-57F
    As low as $15.79 per unit
    8.74 x 5.24 x 2.26 in.
    222 x 133 x 57 mm.
    Material: Polycarbonate
  22. ML-58F
    As low as $18.04 per unit
    8.75 x 5.25 x 3.30 in.
    222 x 133 x 84 mm.
    Material: Polycarbonate
  23. ML-70F
    As low as $25.30 per unit
    10.00 x 7.00 x 4.06 in.
    254 x 178 x 103 mm.
    Material: Polycarbonate
  24. electronic enclosure with graphics

    Take your enclosure from plain to powerful

    with CNC machining and digital printing services from Polycase

    Learn More

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Customization Services

Polycarbonate enclosure with digital printing

CNC Machining

Guaranteed accuracy, no scrap, with 1-3 week lead times; saving you time and money. It's that simple.
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Digital Printing

Enhance your product, impress your customers with high-quality graphics printed directly on the enclosure.
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