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CNC Machining & Graphics  | Instant online pricing on custom enclosures that ship in as little as 1 week. View Capabilities

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. HD-22F Black Enclosure
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    HD-22F NEMA Polycarbonate Enclosure
    As low as $3.88 per unit
    Internal: 2.1" x 2.1" x 1.3"
    55 x 55 x 34 mm
    External: 2.6" x 2.6" x 1.6"
    67 x 67 x 41 mm
    Material: Polycarbonate
  2. Polycase waterproof electrical enclosure
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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
  3. ZH-040404
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    ZH-040404 Hinged NEMA Enclosure
    As low as $26.47 per unit
    Internal: 3.7" x 3.7" x 4.0"
    95 x 95 x 102 mm
    External: 4.4" x 4.4" x 4.3"
    112 x 112 x 110 mm
    Material: Polycarbonate
  4. ZQ-040404-13 electrical junction box
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    ZQ-040404 Electrical Junction Box
    As low as $25.06 per unit
    Internal: 3.7" x 3.7" x 4.0"
    95 x 95 x 102 mm
    External: 4.4" x 4.4" x 4.3"
    112 x 112 x 110 mm
    Material: Polycarbonate
  5. Polycase NEMA electronic enclosure
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    ML-24F Outdoor NEMA Enclosure
    As low as $7.99 per unit
    Internal: 4.1" x 2.2" x 1.7"
    105 x 57 x 44 mm
    External: 4.5" x 2.6" x 2.0"
    114 x 67 x 52 mm
    Material: Polycarbonate
  6. Polycase plastic waterproof electronic enclosure
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    ML-44F Outdoor NEMA Enclosure
    As low as $11.10 per unit
    Internal: 4.0" x 4.0" x 2.1"
    103 x 103 x 54 mm
    External: 4.5" x 4.5" x 2.4"
    114 x 114 x 62 mm
    Material: Polycarbonate
  7. Polycase plastic waterproof electronic enclosure
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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
  8. HD-24F Duo enclosure photo black and gray
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    HD-24F NEMA Polycarbonate Enclosure
    As low as $5.46 per unit
    Internal: 4.1" x 2.1" x 1.2"
    106 x 54 x 30 mm
    External: 4.6" x 2.6" x 1.6"
    118 x 67 x 41 mm
    Material: Polycarbonate
  9. HD-25F Duo enclosure photo black and gray
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    HD-25F NEMA Polycarbonate Enclosure
    As low as $5.72 per unit
    Internal: 4.1" x 2.1" x 1.9"
    106 x 54 x 49 mm
    External: 4.6" x 2.6" x 2.3"
    118 x 67 x 60 mm
    Material: Polycarbonate
  10. HD-44F Duo enclosure photo black and gray
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    HD-44F NEMA Polycarbonate Enclosure
    As low as $7.64 per unit
    Internal: 4.1" x 4.1" x 1.9"
    106 x 106 x 48 mm
    External: 4.6" x 4.6" x 2.3"
    118 x 118 x 60 mm
    Material: Polycarbonate
  11. HN-45-03 Black flanged enclosure for electronics made in the USA
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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
  12. Timer Module

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  13. HP-050403-03
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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
  14. HD-35F Duo enclosure photo black and gray
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    HD-35F NEMA Polycarbonate Enclosure
    As low as $6.71 per unit
    Internal: 5.0" x 3.0" x 1.1"
    128 x 77 x 29 mm
    External: 5.5" x 3.5" x 1.5"
    140 x 89 x 38 mm
    Material: Polycarbonate
  15. 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
  16. Polycase NEMA electronic enclosure
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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
  17. ML-46F*15 Gray outdoor NEMA 4x enclosure for electronics - 6.13 x 4.63 x 2.44 inches
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    ML-46F Outdoor NEMA Enclosure
    As low as $12.02 per unit
    Internal: 5.6" x 4.2" x 2.1"
    145 x 107 x 54 mm
    External: 6.1" x 4.6" x 2.4"
    156 x 118 x 62 mm
    Material: Polycarbonate
  18. HP-060504-03
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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
  19. 6x4x4 waterproof electrical enclosure
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    ZH-060404 Hinged Plastic Enclosure
    As low as $33.45 per unit
    Internal: 5.7" x 3.7" x 4.0"
    146 x 95 x 102 mm
    External: 6.4" x 4.4" x 4.3"
    163 x 112 x 110 mm
    Material: Polycarbonate
  20. ZQ-060404-13 electrical junction box
    Add to Compare Add to Wish List
    ZQ-060404 Electrical Junction Box
    As low as $31.68 per unit
    Internal: 5.7" x 3.7" x 4.0"
    146 x 95 x 102 mm
    External: 6.4" x 4.4" x 4.3"
    163 x 112 x 110 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. ZQ-060604-13 NEMA rated electrical junction box
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    ZQ-060604 Waterproof Junction Box
    As low as $35.79 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
  23. Polycase plastic electronic enclosure
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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
  24. Timer Module

    CNC MACHINING | DIGITAL PRINTING

    Quote and order online in minutes while cutting costs, saving time, and eliminating the third-party hassle.

    CREATE YOUR CUSTOM QUOTE

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