Same Day Shipping 

On in-stock orders placed by 3:00pm EST (Monday-Friday)

RoHS & Reach Compliant 1-440-934-0444

Resources
Contact
My Account
My Cart
Toggle Nav Polycase Logo Toggle Nav
Menu
Account
Search
Advanced Search
  • My Compare ()

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.

62 Items

/
All
Sort By
Filter By
View as Grid List
Page
1 of 3
  1. Small black plastic waterproof enclosure
    Add to Compare Add to Wish List
    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. IP66 rated weatherproof enclosure
    Add to Compare Add to Wish List
    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
  3. black waterproof junction box with extra deep cover
    Add to Compare Add to Wish List
    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
  4. HD-35FMMT Black NEMA 6P rated waterproof polycarbonate enclosure for electronics - 5.5 x 3.5 x 1.5 inches
    Add to Compare Add to Wish List
    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
  5. HD-36F Duo enclosure photo black and gray
    Add to Compare Add to Wish List
    HD-36F Black 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
  6. HD-44FMMT Black NEMA 6P rated waterproof polycarbonate enclosure for electronics - 4.63 x 4.63 x 2.36 inches
    Add to Compare Add to Wish List
    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
  7. HD-45 enclosures for outdoor use
    Add to Compare Add to Wish List
    HD-45F Black Waterproof Box
    As low as $8.02 per unit
    Internal: 6.1" x 4.1" x 1.9"
    156 x 106 x 48 mm
    External: 6.6" x 4.6" x 2.3"
    168 x 119 x 60 mm
    Material: Polycarbonate
  8. Outdoor weatherproof black plastic box
    Add to Compare Add to Wish List
    HD-46F NEMA Polycarbonate Enclosure
    As low as $7.63 per unit
    Internal: 6.1" x 4.1" x 1.1"
    156 x 106 x 29 mm
    External: 6.6" x 4.6" x 1.6"
    168 x 119 x 41 mm
    Material: Polycarbonate
  9. HD-58F Duo enclosure photo black and gray
    Add to Compare Add to Wish List
    HD-58F NEMA Polycarbonate Enclosure
    As low as $11.30 per unit
    Internal: 7.5" x 4.7" x 2.3"
    191 x 121 x 59 mm
    External: 8.0" x 5.2" x 2.7"
    203 x 133 x 69 mm
    Material: Polycarbonate
  10. Polycase hinged waterproof electrical enclosure New
    Add to Compare Add to Wish List
    HP-050403 Hinged Weatherproof Enclosure
    As low as $14.52 per unit
    Internal: 4.6" x 3.6" x 3.0"
    118 x 92 x 76 mm
    External: 5.2" x 4.2" x 3.2"
    133 x 107 x 83 mm
    Material: Polycarbonate
  11. Polycase hinged waterproof electrical enclosure New
    Add to Compare Add to Wish List
    HP-060504 IP66 Weatherproof Box
    As low as $16.74 per unit
    Internal: 5.6" x 4.6" x 4.0"
    143 x 118 x 102 mm
    External: 6.2" x 5.2" x 4.2"
    158 x 133 x 109 mm
    Material: Polycarbonate
  12. outdoor electrical enclosure

    AMERICAN MADE | HP SERIES

    Engineered for reliability, the HP Series offers the weatherproof protection you need at a price you want. Available in black or gray, with an optional clear cover and various external mounting styles to best suit your project.

    SHOP THE HP SERIES
  13. Polycase hinged waterproof electrical enclosure New
    Add to Compare Add to Wish List
    HP-070504 NEMA Electrical Box
    As low as $18.86 per unit
    Internal: 6.6" x 4.6" x 4.0"
    169 x 118 x 102 mm
    External: 7.2" x 5.2" x 4.2"
    183 x 133 x 109 mm
    Material: Polycarbonate
  14. Polycase NEMA rated enclosure New
    Add to Compare Add to Wish List
    HP-070705 IP66 Junction Box
    As low as $24.76 per unit
    Internal: 6.7" x 6.7" x 5.5"
    172 x 172 x 140 mm
    External: 7.2" x 7.2" x 5.7"
    183 x 183 x 147 mm
    Material: Polycarbonate
  15. Polycase waterproof electrical enclosure New
    Add to Compare Add to Wish List
    HP-100604 Low-Profile NEMA Enclosure
    As low as $26.96 per unit
    Internal: 9.6" x 5.6" x 4.0"
    245 x 143 x 102 mm
    External: 10" x 6.2" x 4.2"
    260 x 158 x 109 mm
    Material: Polycarbonate
  16. HP-110706 New
    Add to Compare Add to Wish List
    HP-110706 IP66 Hinged Electrical Box
    As low as $44.45 per unit
    Internal: 10" x 6.7" x 6.0"
    273 x 171 x 152 mm
    External: 11" x 7.2" x 6.3"
    287 x 185 x 161 mm
    Material: Polycarbonate
  17. HP-130906 New
    Add to Compare Add to Wish List
    HP-130906 Weatherproof Electrical Box
    As low as $49.85 per unit
    Internal: 12" x 8.7" x 6.0"
    324 x 222 x 152 mm
    External: 13" x 9.2" x 6.3"
    337 x 236 x 161 mm
    Material: Polycarbonate
  18. Large waterproof box New
    Add to Compare Add to Wish List
    HP-151106 Waterproof Electrical Box
    As low as $61.60 per unit
    Internal: 14" x 10" x 6.0"
    374 x 273 x 152 mm
    External: 15" x 11" x 6.3"
    388 x 287 x 161 mm
    Material: Polycarbonate
  19. ML-22F*15 Gray outdoor waterproof enclosure rated NEMA 4x and NEMA 6P - 2.63 x 2.63 x 1.63 inches
    Add to Compare Add to Wish List
    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
  20. ML-24F*1508 Gray with Clear Cover outdoor waterproof enclosure rated NEMA 4x and NEMA 6P - 4.5 x 2.63 x 2.05 inches
    Add to Compare Add to Wish List
    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
  21. ML-34F*15 Gray outdoor waterproof enclosure rated NEMA 4x and NEMA 6P - 4.53 x 3.56 x 2.25 inches
    Add to Compare Add to Wish List
    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
  22. ML-36F duo image
    Add to Compare Add to Wish List
    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
  23. ML-44F*15 Gray outdoor waterproof box rated NEMA 4x and NEMA 6P - 4.5 x 4.5 x 2.44 inches
    Add to Compare Add to Wish List
    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
  24. outdoor electrical enclosure

    AMERICAN MADE | HP SERIES

    Engineered for reliability, the HP Series offers the weatherproof protection you need at a price you want. Available in black or gray, with an optional clear cover and various external mounting styles to best suit your project.

    SHOP THE HP SERIES

62 Items

/
All
Sort By
Filter By
View as Grid List
Page
1 of 3

You added product to the Comparison List

Close
Shop By
Category
+ Show All
Color
Clear Cover
Series
+ Show All
Size
Inches Millimeters
Length
+/-
min - max
Width
+/-
min - max
Height
+/-
min - max
Length
+/-
Width
+/-
Height
+/-
Please Fill Input Values
Apply
Compare Products
  1. Remove This Item
Compare
Clear All
You have no items to compare.

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.
Learn More

Digital Printing

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

Let us take your enclosure project to the next level.

Get Instant quote

We use cookies to ensure that we give you the best experience on our website. To learn more, go to the Privacy Page.

Close